ordal_1983
==========

M\. A\. Ordal, L\. L\. Long, R\. J\. Bell, S\. E\. Bell, R\. R\. Bell, R\. W\. Alexander, Jr\., and C\. A\. Ward, "Optical properties of the metals Al, Co, Cu, Au, Fe, Pb, Ni, Pd, Pt, Ag, Ti, and W in the infrared and far infrared", Appl\. Opt\. 22, 1099\-1119 \(1983\)

`Source record <https://github.com/LupoLab/optmat/blob/main/src/optmat/data/sources/ordal_1983.toml>`__ · :doc:`Catalogue </the-data/sources>` · :doc:`Review register </register>`

DOI: `10\.1364/AO\.22\.001099 <https://doi.org/10.1364/AO.22.001099>`__

**Source kind:** compilation

**Recorded technique:** A compilation, not a measurement\: 'Infrared optical constants collected from the literature are tabulated' \(abstract, p\. 1099\)\. Tables 1\-12 \(pp\. 1103\-1118\) give, for each of twelve metals, blocks of omega \(cm\-1\), lambda \(um\), \-epsilon\_1, epsilon\_2, n and k to three significant figures, one block per original source, each under its reference line\. 'All data in the form of n and k were changed to epsilon\_1 and epsilon\_2' \(Sec\. III, p\. 1116\)\. The authors then fitted the Drude model, Eq\. \(2\), by eye to the compiled epsilon of Au, Ag, Cu, Al, Pb and W \(Table 13, p\. 1118\)\: omega\_tau from Eq\. \(12\), omega\_tau = omega epsilon\_2 / \(1 \- epsilon\_1\), and omega\_p from Eq\. \(13\), omega\_p^2 = \(1 \- epsilon\_1\)\(omega^2 \+ omega\_tau^2\), at several omega, keeping 'the curve with the best eyeball fit to the data'; for Au and Pb, omega\_tau instead from Brandli and Sievers's far\-infrared surface resistance, Eq\. \(14\), with omega\_p from the near\-infrared fit \(p\. 1118\)\.

**Materials in structured entries:** Ag, Al, Au, Cu

**Dataset quantities:** extinction\_coefficient, permittivity\_imaginary, permittivity\_real, refractive\_index

**Contents:** 72 datasets; 4 formulas.

Curation notes
--------------

Journal pages 1099\-1119 = PDF pages 1\-21 \(0003\-6935/83/071099\-21\)\. PDF page 22 is not part of this paper\: three photographs of a lens\-polishing set\-up \('6 Close\-up of polishing setup', '7 Interferogram \.\.\.', '8 Grinding the cone \.\.\.'\) from another article of the issue\. Identity checked against the first page \(the library flags warnings on the bibliographic record only\)\.

WHAT IS TABULATED\. Tables 1 Al, 2 Cu, 3 Au, 4 Pb, 5 Ag, 6 Co, 7 Fe, 8 Ni, 9 Pd, 10 Pt, 11 Ti and 12 W, each a run of blocks from different authors, printed one after another with a caption per block \('TABLE 2\. Cu, COPPER \(Continued\)'\) and the block's reference line\. The data of Al, Cu, Au and Ag are datasets here, one per metal, quantity and block \(18 blocks, 245 rows, 72 datasets\)\: n and k use = reproduced \(every value is another author's\), epsilon\_1 and epsilon\_2 use = check \(Ordal et al\.'s conversion of the same n and k\), all with reproduced\_from naming the block's source \(the curated id where there is one, otherwise the reference line as printed\)\. lambda \(= 1e4 / omega\) has no dataset and stays in printed\. The fourth column is headed \-epsilon\_1 \(checked on the images\)\: stored as printed with scale = \-1\. No uncertainty is given for any block, and nothing is said about the samples \(film or bulk, preparation\) or the methods of the originals\: for those see the originals\. The figures' captions \(Figs\. 1\-12, pp\. 1100\-1102\) name the sources the same way\.

WHICH BLOCK IS WHICH\. The library splits the tables into 39 blocks \(155 files\) and its captions are not reliable \(tools/extract/ordal\_1983\.py lists the cases\)\: the assignment here was read from the page images, where each caption and reference line sits directly above its block\. The library's 'TABLE 3\. Au, GOLD' \(tbl\_6418218be243\) is copper after Dold and Mecke; gold starts with the next block \(Bennett and Bennett, tbl\_d345d262b8b8\)\.

CHECKS \(2026\-09\-28\)\. Every row of the 18 blocks, and of the other 21, satisfies epsilon\_1 = n^2 \- k^2 and epsilon\_2 = 2nk, and lambda = 1e4 / omega, to within the printed rounding of the cells \(the bound from half a unit in the last digit of each\)\. The worst row per table\: Table 1 \(Al\), Shiles block at 6\.45E\+03 cm\-1, \-epsilon\_1 printed 252 against k^2 \- n^2 = 253\.9 \(0\.91 of the bound\); Table 2 \(Cu\), Lenham and Treherne at 5\.00E\+02, 13500 against 13401 \(0\.57\); Table 3 \(Au\), Weaver et al\. at 1\.21E\+03, 3070 against 3077\.6 \(0\.72\); Table 5 \(Ag\), Bennett and Bennett at 8\.33E\+02, epsilon\_2 1280 against 1283 \(0\.47\)\. Unlike Ordal et al\. \(1988; ordal\_1988, 51 errata\), no \|epsilon\| is printed ten times too small, and no erratum is needed\. The cells were compared with the images block by block\.

THE SOURCES \(as the blocks and Refs\. 7\-11 give them\)\: \- Al \(Table 1, Fig\. 1, Ref\. 7\)\: Shiles, Sasaki, Inokuti and Smith 1980 \(323\-16100 cm\-1; the values of Weaver et al\.'s tabulation, Physics Data 18\-2, p\. 79\); Bennett and Bennett 1966 \(313\-1250 cm\-1; a Drude curve, below\); Schulz 1954 \(10500\-25000 cm\-1, 0\.95\-0\.40 um\)\. \- Cu \(Table 2, Fig\. 2, Ref\. 8\)\: Schulz 1954 \(10500\-22200\); Lenham and Treherne 1966 \(500\-2500\); Robusto and Braunstein 1981 \(15600\-25000\); Hagemann, Gudat and Kunz 1975 \(807\-16100; the DESY report's rows, hagemann\_1974\); Dold and Mecke 1965 \(1000\-8000\)\. \- Au \(Table 3, Fig\. 3, Ref\. 9\)\: Bennett and Bennett 1966 \(313\-3330; a Drude curve\); Schulz 1954 \(10500\-22200\); Motulevich and Shubin 1965 \(833\-10000\); Padalka and Shklyarevskii 1961 \(909\-10000\); Bolotin et al\. 1962 \(1050\-4000\); Brandli and Sievers 1972 \(31\.4\-150, the far infrared\); Weaver et al\. 1981 \(807\-16100\)\. \- Ag \(Table 5, Fig\. 5, Ref\. 11\)\: Bennett and Bennett 1966 \(313\-5000; a Drude curve\); Schulz 1954 \(10500\-25000\); Hagemann et al\. 1975 \(807\-16100\)\. The blocks overlap and disagree\: at 1000 cm\-1 \(10 um\) gold's n \+ ik is 7\.62 \+ 71\.5i \(Bennett\), 11\.5 \+ 67\.5i \(Motulevich\), 7\.41 \+ 53\.4i \(Padalka\) and, at 1050 cm\-1, 10\.9 \+ 50\.6i \(Bolotin\); the authors do not choose between them\.

BENNETT AND BENNETT'S BLOCKS ARE A DRUDE CURVE\. The introduction says Bennett and Bennett showed that the Drude model fits the reflectance of Au, Ag and Al at 3\-30 um 'with one adjustable parameter; i\.e\., the Drude model parameters were obtained from the dc resistivity and fitted with one free electron per atom for gold and silver and 2\.6 free electrons per atom for aluminum' \(p\. 1099; Ref\. 5\: omega\_tau estimated at 145, 216 and 663 cm\-1 for Ag, Au and Al\)\. Every row of the three Bennett blocks gives, by Eqs\. \(12\) and \(13\), the same omega\_tau and omega\_p to the printed rounding \(Al 657\-669 and 118,200\-119,100 cm\-1; Au 214\-217 and 72,500\-73,000; Ag 144\.8\-146\.1 and 72,360\-72,710\)\: the blocks are that model, not measured points\.

HAGEMANN'S AND WEAVER'S BLOCKS\. The Hagemann blocks cite the JOSA paper \(hagemann\_1975, figures only\) but are the DESY report's printed rows \(hagemann\_1974\) at 0\.1\-2\.0 eV, n and k rounded \(n to two decimals\) and epsilon recomputed from them\. The Weaver block of gold is Weaver et al\.'s gold table \(weaver\_1981\), agreeing with the Babar\-Weaver file's copy \(sheet JHW\-Au\-ZAED\) at every common energy; epsilon is again recomputed from the rounded n and k\. See the datasets' notes for the numbers\.

TABLE 13 \(p\. 1118\)\: Drude parameters fitted to the compiled epsilon, the formulas below for Al, Cu, Au and Ag\. Columns\: omega\_f, 'the frequency at which the fit is forced'; omega\_tau and omega\_p of the IR fit; \-epsilon\_1\(0\) = \(omega\_p / omega\_tau\)^2; omega\_tau 'from dc resistivities and omega\_p' \(Ref\. 19, the AIP Handbook\); omega\_tau at the crossover \-epsilon\_1 = epsilon\_2\. Pb\: 5\.00x10^1, 1\.45x10^3, 6\.20x10^4, 1\.33x10^3, 1\.35x10^3, 1\.55x10^3; W\: 8\.06x10^2, 4\.33x10^2, 4\.84x10^4, 1\.25x10^4, 2\.16x10^2, 4\.30x10^2 \(same order, cm\-1\)\. The Al, Au and Ag fits reproduce Bennett and Bennett's Drude curves \(to 0\.1\-5 %\), not Shiles's Al \(30\-40 % away at 1000\-5000 cm\-1\) nor Weaver's Au\. The authors 'disclaim any physical significance for the Drude model' \(p\. 1118\)\. Ordal et al\. 1985 \(ordal\_1985\) revise these\: Cu \(omega\_tau 73\.2, omega\_p 59,600\), Pb \('a numerical error in our earlier tabulation'\) and slightly Al, Au, Ag and W; it also corrects this paper's Eq\. \(5\) \(epsilon\_inf misplaced in omega\_p\) and Eq\. \(10\) \(the surface impedance's sign convention; Eq\. \(11\), and so the numbers, unchanged\)\.

THE OTHER METALS \(not registered; not transcribed\)\. Every row consistent as above\. Pb \(Table 4, pp\. 1107\-1108\)\: Brandli and Sievers 1972 \(6\.25\-121 cm\-1, 14 rows\); Golovashkin and Motulevich 1968 \(833\-22200, 32\)\. Co \(Table 6, pp\. 1109\-1110\)\: Kirillova and Charikov 1964 \(500\-4000, 19\); Johnson and Christy 1974 \(5160\-53200, 49\); Weaver, Colavita, Lynch and Rosei 1979 \(807\-16100, 18\)\. Fe \(Table 7, p\. 1111\)\: Weaver, Colavita, Lynch and Rosei 1979 \(807\-16100, 31\); Bolotin, Kirillova and Mayevskiy 1969 \(526\-10000, 21\)\. Ni \(Table 8, p\. 1112\)\: Lynch, Rosei and Weaver 1971 \(807\-12900, 50\); Johnson and Christy 1974 \(5160\-20200, 16\)\. Pd \(Table 9, p\. 1113, printed sideways\)\: Weaver and Benbow 1975 \(807\-16100, 15\); Bolotin, Kirilova, Nomerovannaya and Noskov 1967 \(556\-3330, 13; not among the library's tables\); Johnson and Christy 1974 \(5160\-48200, 44; the library merges it with Weaver and Benbow's into one 12\-column table without a CSV\)\. Pt \(Table 10, p\. 1114\)\: Weaver 1975 \(807\-16100, 14\); Weaver, Lynch and Olson 1974 \(806\-16100, 29\)\. Ti \(Table 11, pp\. 1115\-1116\)\: Kirillova and Charikov 1964 \(500\-4000, 24\); Lynch, Olson and Weaver 1975 \(807\-1690, 6\); Johnson and Christy 1974 \(5160\-12200, 8\); Kirillova and Charikov 1963 \(2500\-8330, 19\); Bolotin et al\. 1962 \(1000\-5000, 17\), whose rows from 1180 to 4000 cm\-1 repeat the Kirillova and Charikov 1964 block's \(identical but for a unit in the last digit at 2220 cm\-1; a probable compilation error\)\. W \(Table 12, pp\. 1117\-1118\)\: Nomerovannaya, Kirillova and Noskov 1964 \(500\-10000, 48 \+ 19 rows over two blocks, the second without a reference line\); Weaver, Lynch and Olson 1975 \(484\-16100, 19; epsilon\_1 positive at 1\.21E\+04 and 1\.61E\+04, printed \-epsilon\_1 = \-4\.33 and \-4\.61\)\.

FIGURES 1\-12 \(pp\. 1100\-1102\)\: \-epsilon\_1 and epsilon\_2 against omega \(log\-log\) for each metal, the blocks' data as symbols and, for Al, Cu, Au, Pb, Ag and W, the Drude curve of Table 13 as a line; not digitised\.

**Recorded bibliographic identity status:** VALIDATED\_WITH\_WARNINGS. This concerns identification of the source; it does not establish the scientific correctness of its contents.

Datasets
--------

ordal\_1983/n\_Al\_shiles
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Al_shiles",
     "material": "Al",
     "file": "Al/ordal_1983__n_Al_shiles.csv",
     "table": "tbl_fd6106702469",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "shiles_1980",
       "weaver_1981"
     ]
   }

Table 1, p\. 1103 \(first block of Table 1, 'TABLE 1\. Al, ALUMINUM'\)\: n of aluminium, 323\-16100 cm\-1 \(31\-0\.62 um\), 26 rows, from 'E\. Shiles, T\. Sasaki, M\. Inokuti, and D\. Y\. Smith, Phys\. Rev\. B 22, 1612 \(1980\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. The values are Weaver et al\.'s tabulation of Shiles et al\.'s analysis \(Physics Data 18\-2, p\. 79; shiles\_1980 says its tabulation is given elsewhere\), rounded to three figures at omega = E \(eV\) x 8065\.5\: at 0\.040 eV the scan prints n = 98\.595, k = 203\.701, epsilon\_1 = \-31773, epsilon\_2 = 40168, here 98\.6, 204, 3\.18E\+04, 4\.02E\+04 \(checked at 0\.040\-0\.062 eV against the scan of that page on J\. H\. Weaver's website, 2026\-09\-28\)\.

ordal\_1983/k\_Al\_shiles
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Al_shiles",
     "material": "Al",
     "file": "Al/ordal_1983__k_Al_shiles.csv",
     "table": "tbl_fd6106702469",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "shiles_1980",
       "weaver_1981"
     ]
   }

Table 1, p\. 1103 \(first block of Table 1, 'TABLE 1\. Al, ALUMINUM'\)\: k of aluminium, 323\-16100 cm\-1 \(31\-0\.62 um\), 26 rows, from 'E\. Shiles, T\. Sasaki, M\. Inokuti, and D\. Y\. Smith, Phys\. Rev\. B 22, 1612 \(1980\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. See the n dataset's notes\.

ordal\_1983/eps1\_Al\_shiles
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Al_shiles",
     "material": "Al",
     "file": "Al/ordal_1983__eps1_Al_shiles.csv",
     "table": "tbl_fd6106702469",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "shiles_1980",
       "weaver_1981"
     ]
   }

Table 1, p\. 1103 \(first block of Table 1, 'TABLE 1\. Al, ALUMINUM'\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 26 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Al\_shiles
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Al_shiles",
     "material": "Al",
     "file": "Al/ordal_1983__eps2_Al_shiles.csv",
     "table": "tbl_fd6106702469",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "shiles_1980",
       "weaver_1981"
     ]
   }

Table 1, p\. 1103 \(first block of Table 1, 'TABLE 1\. Al, ALUMINUM'\)\: epsilon\_2, 26 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Al\_bennett
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Al_bennett",
     "material": "Al",
     "file": "Al/ordal_1983__n_Al_bennett.csv",
     "table": "tbl_c2e00320bb13",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "H. E. Bennett and J. M. Bennett, Optical Properties and Electronics Structure of Metals and Alloys, ed. F. Abeles (North-Holland, 1966), p. 175"
     ]
   }

Table 1, p\. 1103 \(second block, 'TABLE 1\. Al, ALUMINUM \(Continued\)'\)\: n of aluminium, 313\-1250 cm\-1 \(32\-8 um\), 25 rows, from 'H\. E\. Bennett and J\. M\. Bennett, Optical Properties and Electronics Structure of Metals and Alloys, ed\. F\. Abeles \(North\-Holland, 1966\), p\. 175' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. A DRUDE CURVE, NOT MEASURED POINTS\: every row gives, by Ordal's Eqs\. \(12\)\-\(13\), omega\_tau = 657\-669 cm\-1 and omega\_p = 118,200\-119,100 cm\-1, constant to the printed rounding, i\.e\. Bennett and Bennett's Drude model \(Ordal's Ref\. 5\: omega\_tau estimated at 663 cm\-1 for Al; the model 'fitted with \.\.\. 2\.6 free electrons per atom for aluminum', p\. 1099\)\.

ordal\_1983/k\_Al\_bennett
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Al_bennett",
     "material": "Al",
     "file": "Al/ordal_1983__k_Al_bennett.csv",
     "table": "tbl_c2e00320bb13",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "H. E. Bennett and J. M. Bennett, Optical Properties and Electronics Structure of Metals and Alloys, ed. F. Abeles (North-Holland, 1966), p. 175"
     ]
   }

Table 1, p\. 1103 \(second block, 'TABLE 1\. Al, ALUMINUM \(Continued\)'\)\: k of aluminium, 313\-1250 cm\-1 \(32\-8 um\), 25 rows, from 'H\. E\. Bennett and J\. M\. Bennett, Optical Properties and Electronics Structure of Metals and Alloys, ed\. F\. Abeles \(North\-Holland, 1966\), p\. 175' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. See the n dataset's notes\.

ordal\_1983/eps1\_Al\_bennett
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Al_bennett",
     "material": "Al",
     "file": "Al/ordal_1983__eps1_Al_bennett.csv",
     "table": "tbl_c2e00320bb13",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "H. E. Bennett and J. M. Bennett, Optical Properties and Electronics Structure of Metals and Alloys, ed. F. Abeles (North-Holland, 1966), p. 175"
     ]
   }

Table 1, p\. 1103 \(second block, 'TABLE 1\. Al, ALUMINUM \(Continued\)'\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 25 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Al\_bennett
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Al_bennett",
     "material": "Al",
     "file": "Al/ordal_1983__eps2_Al_bennett.csv",
     "table": "tbl_c2e00320bb13",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "H. E. Bennett and J. M. Bennett, Optical Properties and Electronics Structure of Metals and Alloys, ed. F. Abeles (North-Holland, 1966), p. 175"
     ]
   }

Table 1, p\. 1103 \(second block, 'TABLE 1\. Al, ALUMINUM \(Continued\)'\)\: epsilon\_2, 25 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Al\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Al_schulz",
     "material": "Al",
     "file": "Al/ordal_1983__n_Al_schulz.csv",
     "table": "tbl_7ec42378518f",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, 357 (1954) and 362 (1954)"
     ]
   }

Table 1, p\. 1104 \(first block, 'TABLE 1\. Al, ALUMINUM \(Continued\)'\)\: n of aluminium, 10500\-25000 cm\-1 \(0\.95\-0\.40 um\), 12 rows, from 'L\. G\. Schulz, J\. Opt\. Soc\. Am\. 44, 357 \(1954\) and 362 \(1954\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/k\_Al\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Al_schulz",
     "material": "Al",
     "file": "Al/ordal_1983__k_Al_schulz.csv",
     "table": "tbl_7ec42378518f",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, 357 (1954) and 362 (1954)"
     ]
   }

Table 1, p\. 1104 \(first block, 'TABLE 1\. Al, ALUMINUM \(Continued\)'\)\: k of aluminium, 10500\-25000 cm\-1 \(0\.95\-0\.40 um\), 12 rows, from 'L\. G\. Schulz, J\. Opt\. Soc\. Am\. 44, 357 \(1954\) and 362 \(1954\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/eps1\_Al\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Al_schulz",
     "material": "Al",
     "file": "Al/ordal_1983__eps1_Al_schulz.csv",
     "table": "tbl_7ec42378518f",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, 357 (1954) and 362 (1954)"
     ]
   }

Table 1, p\. 1104 \(first block, 'TABLE 1\. Al, ALUMINUM \(Continued\)'\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 12 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Al\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Al_schulz",
     "material": "Al",
     "file": "Al/ordal_1983__eps2_Al_schulz.csv",
     "table": "tbl_7ec42378518f",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, 357 (1954) and 362 (1954)"
     ]
   }

Table 1, p\. 1104 \(first block, 'TABLE 1\. Al, ALUMINUM \(Continued\)'\)\: epsilon\_2, 12 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Cu\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Cu_schulz",
     "material": "Cu",
     "file": "Cu/ordal_1983__n_Cu_schulz.csv",
     "table": "tbl_18533a8f9142",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, 357 and 362 (1954)"
     ]
   }

Table 2, p\. 1104 \(second block, 'TABLE 2\. Cu, COPPER'\)\: n of copper, 10500\-22200 cm\-1 \(0\.95\-0\.45 um\), 11 rows, from 'L\. G\. Schulz, J\. Opt\. Soc\. Am\. 44, 357 and 362 \(1954\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/k\_Cu\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Cu_schulz",
     "material": "Cu",
     "file": "Cu/ordal_1983__k_Cu_schulz.csv",
     "table": "tbl_18533a8f9142",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, 357 and 362 (1954)"
     ]
   }

Table 2, p\. 1104 \(second block, 'TABLE 2\. Cu, COPPER'\)\: k of copper, 10500\-22200 cm\-1 \(0\.95\-0\.45 um\), 11 rows, from 'L\. G\. Schulz, J\. Opt\. Soc\. Am\. 44, 357 and 362 \(1954\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/eps1\_Cu\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Cu_schulz",
     "material": "Cu",
     "file": "Cu/ordal_1983__eps1_Cu_schulz.csv",
     "table": "tbl_18533a8f9142",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, 357 and 362 (1954)"
     ]
   }

Table 2, p\. 1104 \(second block, 'TABLE 2\. Cu, COPPER'\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 11 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Cu\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Cu_schulz",
     "material": "Cu",
     "file": "Cu/ordal_1983__eps2_Cu_schulz.csv",
     "table": "tbl_18533a8f9142",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, 357 and 362 (1954)"
     ]
   }

Table 2, p\. 1104 \(second block, 'TABLE 2\. Cu, COPPER'\)\: epsilon\_2, 11 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Cu\_lenham
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Cu_lenham",
     "material": "Cu",
     "file": "Cu/ordal_1983__n_Cu_lenham.csv",
     "table": "tbl_97a509391e26",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "A. P. Lenham and D. M. Treherne, J. Opt. Soc. Am. 56, 683 (1966)"
     ]
   }

Table 2, p\. 1104 \(third block, 'TABLE 2\. Cu, COPPER \(Continued\)'\)\: n of copper, 500\-2500 cm\-1 \(20\-4 um\), 10 rows, from 'A\. P\. Lenham and D\. M\. Treherne, J\. Opt\. Soc\. Am\. 56, 683 \(1966\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/k\_Cu\_lenham
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Cu_lenham",
     "material": "Cu",
     "file": "Cu/ordal_1983__k_Cu_lenham.csv",
     "table": "tbl_97a509391e26",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "A. P. Lenham and D. M. Treherne, J. Opt. Soc. Am. 56, 683 (1966)"
     ]
   }

Table 2, p\. 1104 \(third block, 'TABLE 2\. Cu, COPPER \(Continued\)'\)\: k of copper, 500\-2500 cm\-1 \(20\-4 um\), 10 rows, from 'A\. P\. Lenham and D\. M\. Treherne, J\. Opt\. Soc\. Am\. 56, 683 \(1966\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/eps1\_Cu\_lenham
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Cu_lenham",
     "material": "Cu",
     "file": "Cu/ordal_1983__eps1_Cu_lenham.csv",
     "table": "tbl_97a509391e26",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "A. P. Lenham and D. M. Treherne, J. Opt. Soc. Am. 56, 683 (1966)"
     ]
   }

Table 2, p\. 1104 \(third block, 'TABLE 2\. Cu, COPPER \(Continued\)'\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 10 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Cu\_lenham
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Cu_lenham",
     "material": "Cu",
     "file": "Cu/ordal_1983__eps2_Cu_lenham.csv",
     "table": "tbl_97a509391e26",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "A. P. Lenham and D. M. Treherne, J. Opt. Soc. Am. 56, 683 (1966)"
     ]
   }

Table 2, p\. 1104 \(third block, 'TABLE 2\. Cu, COPPER \(Continued\)'\)\: epsilon\_2, 10 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Cu\_robusto
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Cu_robusto",
     "material": "Cu",
     "file": "Cu/ordal_1983__n_Cu_robusto.csv",
     "table": "tbl_594ca77df023",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "P. F. Robusto and Braunstein, Phys. Stat. Sol. (b) 107, 443 (1981)"
     ]
   }

Table 2, p\. 1104 \(fourth block, 'TABLE 2\. Cu, Copper \(Continued\)'\)\: n of copper, 15600\-25000 cm\-1 \(0\.64\-0\.40 um\), 7 rows, from 'P\. F\. Robusto and Braunstein, Phys\. Stat\. Sol\. \(b\) 107, 443 \(1981\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/k\_Cu\_robusto
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Cu_robusto",
     "material": "Cu",
     "file": "Cu/ordal_1983__k_Cu_robusto.csv",
     "table": "tbl_594ca77df023",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "P. F. Robusto and Braunstein, Phys. Stat. Sol. (b) 107, 443 (1981)"
     ]
   }

Table 2, p\. 1104 \(fourth block, 'TABLE 2\. Cu, Copper \(Continued\)'\)\: k of copper, 15600\-25000 cm\-1 \(0\.64\-0\.40 um\), 7 rows, from 'P\. F\. Robusto and Braunstein, Phys\. Stat\. Sol\. \(b\) 107, 443 \(1981\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/eps1\_Cu\_robusto
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Cu_robusto",
     "material": "Cu",
     "file": "Cu/ordal_1983__eps1_Cu_robusto.csv",
     "table": "tbl_594ca77df023",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "P. F. Robusto and Braunstein, Phys. Stat. Sol. (b) 107, 443 (1981)"
     ]
   }

Table 2, p\. 1104 \(fourth block, 'TABLE 2\. Cu, Copper \(Continued\)'\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 7 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Cu\_robusto
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Cu_robusto",
     "material": "Cu",
     "file": "Cu/ordal_1983__eps2_Cu_robusto.csv",
     "table": "tbl_594ca77df023",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "P. F. Robusto and Braunstein, Phys. Stat. Sol. (b) 107, 443 (1981)"
     ]
   }

Table 2, p\. 1104 \(fourth block, 'TABLE 2\. Cu, Copper \(Continued\)'\)\: epsilon\_2, 7 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Cu\_hagemann
~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Cu_hagemann",
     "material": "Cu",
     "file": "Cu/ordal_1983__n_Cu_hagemann.csv",
     "table": "tbl_8b93c46d68a7",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "hagemann_1975",
       "hagemann_1974"
     ]
   }

Table 2, p\. 1105 \(first block, 'TABLE 2\. Cu, COPPER \(Continued\)'\)\: n of copper, 807\-16100 cm\-1 \(12\.4\-0\.62 um\), 10 rows, from 'H\. J\. Hagemann, W\. Gudat, and C\. Kunz, J\. Opt\. Soc\. Am\. 65, 742 \(1975\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. The JOSA paper has figures only; the rows are those of the DESY report SR\-74/7 \(hagemann\_1974, Table 3\) at 0\.1, 0\.5, 1\.0, 1\.5, 1\.7, 1\.75, 1\.8, 1\.85, 1\.9 and 2\.0 eV, n and k rounded \(n to two decimals\) and epsilon recomputed from them\. Against the library's reading of the report\: agreement to the rounding at 1\.5\-2\.0 eV; at 0\.1 eV n, k = 29\.7, 71\.6 here against 29\.1, 71\.1 printed in the report \(whose own epsilon, \-4\.24E3 and 4\.25E3, equal this row's and agree with 29\.7, 71\.6, not with 29\.1, 71\.1\); at 0\.5 eV n = 1\.71 against 1\.692; at 1\.0 eV 0\.44, 8\.48 against 0\.433, 8\.46 \(the report's cells as the library reads them, checked 2026\-09\-28; see hagemann\_1974\)\.

ordal\_1983/k\_Cu\_hagemann
~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Cu_hagemann",
     "material": "Cu",
     "file": "Cu/ordal_1983__k_Cu_hagemann.csv",
     "table": "tbl_8b93c46d68a7",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "hagemann_1975",
       "hagemann_1974"
     ]
   }

Table 2, p\. 1105 \(first block, 'TABLE 2\. Cu, COPPER \(Continued\)'\)\: k of copper, 807\-16100 cm\-1 \(12\.4\-0\.62 um\), 10 rows, from 'H\. J\. Hagemann, W\. Gudat, and C\. Kunz, J\. Opt\. Soc\. Am\. 65, 742 \(1975\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. See the n dataset's notes\.

ordal\_1983/eps1\_Cu\_hagemann
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Cu_hagemann",
     "material": "Cu",
     "file": "Cu/ordal_1983__eps1_Cu_hagemann.csv",
     "table": "tbl_8b93c46d68a7",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "hagemann_1975",
       "hagemann_1974"
     ]
   }

Table 2, p\. 1105 \(first block, 'TABLE 2\. Cu, COPPER \(Continued\)'\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 10 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Cu\_hagemann
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Cu_hagemann",
     "material": "Cu",
     "file": "Cu/ordal_1983__eps2_Cu_hagemann.csv",
     "table": "tbl_8b93c46d68a7",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "hagemann_1975",
       "hagemann_1974"
     ]
   }

Table 2, p\. 1105 \(first block, 'TABLE 2\. Cu, COPPER \(Continued\)'\)\: epsilon\_2, 10 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Cu\_dold
~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Cu_dold",
     "material": "Cu",
     "file": "Cu/ordal_1983__n_Cu_dold.csv",
     "table": "tbl_6418218be243",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "B. Dold and R. Mecke, Optik 22, 435 (1965)"
     ]
   }

Table 2, p\. 1105 \(second block, 'TABLE 2\. Cu, COPPER \(Continued\)'\); the library labels this table 'TABLE 3\. Au, GOLD'\: n of copper, 1000\-8000 cm\-1 \(10\-1\.25 um\), 11 rows, from 'B\. Dold and R\. Mecke, Optik 22, 435 \(1965\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/k\_Cu\_dold
~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Cu_dold",
     "material": "Cu",
     "file": "Cu/ordal_1983__k_Cu_dold.csv",
     "table": "tbl_6418218be243",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "B. Dold and R. Mecke, Optik 22, 435 (1965)"
     ]
   }

Table 2, p\. 1105 \(second block, 'TABLE 2\. Cu, COPPER \(Continued\)'\); the library labels this table 'TABLE 3\. Au, GOLD'\: k of copper, 1000\-8000 cm\-1 \(10\-1\.25 um\), 11 rows, from 'B\. Dold and R\. Mecke, Optik 22, 435 \(1965\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/eps1\_Cu\_dold
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Cu_dold",
     "material": "Cu",
     "file": "Cu/ordal_1983__eps1_Cu_dold.csv",
     "table": "tbl_6418218be243",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "B. Dold and R. Mecke, Optik 22, 435 (1965)"
     ]
   }

Table 2, p\. 1105 \(second block, 'TABLE 2\. Cu, COPPER \(Continued\)'\); the library labels this table 'TABLE 3\. Au, GOLD'\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 11 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Cu\_dold
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Cu_dold",
     "material": "Cu",
     "file": "Cu/ordal_1983__eps2_Cu_dold.csv",
     "table": "tbl_6418218be243",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "B. Dold and R. Mecke, Optik 22, 435 (1965)"
     ]
   }

Table 2, p\. 1105 \(second block, 'TABLE 2\. Cu, COPPER \(Continued\)'\); the library labels this table 'TABLE 3\. Au, GOLD'\: epsilon\_2, 11 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Au\_bennett
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Au_bennett",
     "material": "Au",
     "file": "Au/ordal_1983__n_Au_bennett.csv",
     "table": "tbl_d345d262b8b8",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "H. E. Bennett and J. M. Bennett, Optical Properties and Electronic Structure of Metals and Alloys edited by F. Abeles (North-Holland, Amsterdam, 1966), p. 175"
     ]
   }

Table 3, p\. 1105 \(third block, 'TABLE 3\. Au, GOLD'; unlabelled in the library\)\: n of gold, 313\-3330 cm\-1 \(32\-3 um\), 18 rows, from 'H\. E\. Bennett and J\. M\. Bennett, Optical Properties and Electronic Structure of Metals and Alloys edited by F\. Abeles \(North\-Holland, Amsterdam, 1966\), p\. 175' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. A DRUDE CURVE, NOT MEASURED POINTS\: every row gives, by Ordal's Eqs\. \(12\)\-\(13\), omega\_tau = 214\-217 cm\-1 and omega\_p = 72,500\-73,000 cm\-1, constant to the printed rounding \(Ordal's Ref\. 5\: omega\_tau estimated at 216 cm\-1 for Au, one free electron per atom\)\.

ordal\_1983/k\_Au\_bennett
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Au_bennett",
     "material": "Au",
     "file": "Au/ordal_1983__k_Au_bennett.csv",
     "table": "tbl_d345d262b8b8",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "H. E. Bennett and J. M. Bennett, Optical Properties and Electronic Structure of Metals and Alloys edited by F. Abeles (North-Holland, Amsterdam, 1966), p. 175"
     ]
   }

Table 3, p\. 1105 \(third block, 'TABLE 3\. Au, GOLD'; unlabelled in the library\)\: k of gold, 313\-3330 cm\-1 \(32\-3 um\), 18 rows, from 'H\. E\. Bennett and J\. M\. Bennett, Optical Properties and Electronic Structure of Metals and Alloys edited by F\. Abeles \(North\-Holland, Amsterdam, 1966\), p\. 175' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. See the n dataset's notes\.

ordal\_1983/eps1\_Au\_bennett
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Au_bennett",
     "material": "Au",
     "file": "Au/ordal_1983__eps1_Au_bennett.csv",
     "table": "tbl_d345d262b8b8",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "H. E. Bennett and J. M. Bennett, Optical Properties and Electronic Structure of Metals and Alloys edited by F. Abeles (North-Holland, Amsterdam, 1966), p. 175"
     ]
   }

Table 3, p\. 1105 \(third block, 'TABLE 3\. Au, GOLD'; unlabelled in the library\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 18 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Au\_bennett
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Au_bennett",
     "material": "Au",
     "file": "Au/ordal_1983__eps2_Au_bennett.csv",
     "table": "tbl_d345d262b8b8",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "H. E. Bennett and J. M. Bennett, Optical Properties and Electronic Structure of Metals and Alloys edited by F. Abeles (North-Holland, Amsterdam, 1966), p. 175"
     ]
   }

Table 3, p\. 1105 \(third block, 'TABLE 3\. Au, GOLD'; unlabelled in the library\)\: epsilon\_2, 18 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Au\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Au_schulz",
     "material": "Au",
     "file": "Au/ordal_1983__n_Au_schulz.csv",
     "table": "tbl_17b239fd0da5",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, 357 and 362 (1954)"
     ]
   }

Table 3, p\. 1106 \(first block, 'TABLE 3\. Au, Gold \(Continued\)'\)\: n of gold, 10500\-22200 cm\-1 \(0\.95\-0\.45 um\), 7 rows, from 'L\. G\. Schulz, J\. Opt\. Soc\. Am\. 44, 357 and 362 \(1954\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/k\_Au\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Au_schulz",
     "material": "Au",
     "file": "Au/ordal_1983__k_Au_schulz.csv",
     "table": "tbl_17b239fd0da5",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, 357 and 362 (1954)"
     ]
   }

Table 3, p\. 1106 \(first block, 'TABLE 3\. Au, Gold \(Continued\)'\)\: k of gold, 10500\-22200 cm\-1 \(0\.95\-0\.45 um\), 7 rows, from 'L\. G\. Schulz, J\. Opt\. Soc\. Am\. 44, 357 and 362 \(1954\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/eps1\_Au\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Au_schulz",
     "material": "Au",
     "file": "Au/ordal_1983__eps1_Au_schulz.csv",
     "table": "tbl_17b239fd0da5",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, 357 and 362 (1954)"
     ]
   }

Table 3, p\. 1106 \(first block, 'TABLE 3\. Au, Gold \(Continued\)'\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 7 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Au\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Au_schulz",
     "material": "Au",
     "file": "Au/ordal_1983__eps2_Au_schulz.csv",
     "table": "tbl_17b239fd0da5",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, 357 and 362 (1954)"
     ]
   }

Table 3, p\. 1106 \(first block, 'TABLE 3\. Au, Gold \(Continued\)'\)\: epsilon\_2, 7 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Au\_motulevich
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Au_motulevich",
     "material": "Au",
     "file": "Au/ordal_1983__n_Au_motulevich.csv",
     "table": "tbl_7fb8ff587269",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "G. P. Motulevich and A. A. Shubin, Soviet Phys. JETP 20, 560 (1965)"
     ]
   }

Table 3, p\. 1106 \(second block, 'TABLE 3\. Au, GOLD \(Continued\)'\)\: n of gold, 833\-10000 cm\-1 \(12\-1 um\), 11 rows, from 'G\. P\. Motulevich and A\. A\. Shubin, Soviet Phys\. JETP 20, 560 \(1965\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/k\_Au\_motulevich
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Au_motulevich",
     "material": "Au",
     "file": "Au/ordal_1983__k_Au_motulevich.csv",
     "table": "tbl_7fb8ff587269",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "G. P. Motulevich and A. A. Shubin, Soviet Phys. JETP 20, 560 (1965)"
     ]
   }

Table 3, p\. 1106 \(second block, 'TABLE 3\. Au, GOLD \(Continued\)'\)\: k of gold, 833\-10000 cm\-1 \(12\-1 um\), 11 rows, from 'G\. P\. Motulevich and A\. A\. Shubin, Soviet Phys\. JETP 20, 560 \(1965\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/eps1\_Au\_motulevich
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Au_motulevich",
     "material": "Au",
     "file": "Au/ordal_1983__eps1_Au_motulevich.csv",
     "table": "tbl_7fb8ff587269",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "G. P. Motulevich and A. A. Shubin, Soviet Phys. JETP 20, 560 (1965)"
     ]
   }

Table 3, p\. 1106 \(second block, 'TABLE 3\. Au, GOLD \(Continued\)'\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 11 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Au\_motulevich
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Au_motulevich",
     "material": "Au",
     "file": "Au/ordal_1983__eps2_Au_motulevich.csv",
     "table": "tbl_7fb8ff587269",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "G. P. Motulevich and A. A. Shubin, Soviet Phys. JETP 20, 560 (1965)"
     ]
   }

Table 3, p\. 1106 \(second block, 'TABLE 3\. Au, GOLD \(Continued\)'\)\: epsilon\_2, 11 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Au\_padalka
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Au_padalka",
     "material": "Au",
     "file": "Au/ordal_1983__n_Au_padalka.csv",
     "table": "tbl_9c35180248e0",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "V. G. Padalka and I. N. Shklyarevskii, Opt. Spectr. U.S.S.R. 11, 285 (1961)"
     ]
   }

Table 3, p\. 1106 \(third block, 'TABLE 3\. Au, GOLD \(Continued\)'; the library attaches the reference to the block above\)\: n of gold, 909\-10000 cm\-1 \(11\-1 um\), 11 rows, from 'V\. G\. Padalka and I\. N\. Shklyarevskii, Opt\. Spectr\. U\.S\.S\.R\. 11, 285 \(1961\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/k\_Au\_padalka
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Au_padalka",
     "material": "Au",
     "file": "Au/ordal_1983__k_Au_padalka.csv",
     "table": "tbl_9c35180248e0",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "V. G. Padalka and I. N. Shklyarevskii, Opt. Spectr. U.S.S.R. 11, 285 (1961)"
     ]
   }

Table 3, p\. 1106 \(third block, 'TABLE 3\. Au, GOLD \(Continued\)'; the library attaches the reference to the block above\)\: k of gold, 909\-10000 cm\-1 \(11\-1 um\), 11 rows, from 'V\. G\. Padalka and I\. N\. Shklyarevskii, Opt\. Spectr\. U\.S\.S\.R\. 11, 285 \(1961\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/eps1\_Au\_padalka
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Au_padalka",
     "material": "Au",
     "file": "Au/ordal_1983__eps1_Au_padalka.csv",
     "table": "tbl_9c35180248e0",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "V. G. Padalka and I. N. Shklyarevskii, Opt. Spectr. U.S.S.R. 11, 285 (1961)"
     ]
   }

Table 3, p\. 1106 \(third block, 'TABLE 3\. Au, GOLD \(Continued\)'; the library attaches the reference to the block above\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 11 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Au\_padalka
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Au_padalka",
     "material": "Au",
     "file": "Au/ordal_1983__eps2_Au_padalka.csv",
     "table": "tbl_9c35180248e0",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "V. G. Padalka and I. N. Shklyarevskii, Opt. Spectr. U.S.S.R. 11, 285 (1961)"
     ]
   }

Table 3, p\. 1106 \(third block, 'TABLE 3\. Au, GOLD \(Continued\)'; the library attaches the reference to the block above\)\: epsilon\_2, 11 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Au\_bolotin
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Au_bolotin",
     "material": "Au",
     "file": "Au/ordal_1983__n_Au_bolotin.csv",
     "table": "tbl_7bbc87402022",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "G. A. Bolotin, A. N. Voloshinskii, M. M. Neskov, A. V. Sokolov, and B. A. Charikov, Phys. Met. and Met. 13, 823 (1962)"
     ]
   }

Table 3, p\. 1106 \(fourth block, 'TABLE 3\. Au, GOLD \(Continued\)'\)\: n of gold, 1050\-4000 cm\-1 \(9\.5\-2\.5 um\), 12 rows, from 'G\. A\. Bolotin, A\. N\. Voloshinskii, M\. M\. Neskov, A\. V\. Sokolov, and B\. A\. Charikov, Phys\. Met\. and Met\. 13, 823 \(1962\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/k\_Au\_bolotin
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Au_bolotin",
     "material": "Au",
     "file": "Au/ordal_1983__k_Au_bolotin.csv",
     "table": "tbl_7bbc87402022",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "G. A. Bolotin, A. N. Voloshinskii, M. M. Neskov, A. V. Sokolov, and B. A. Charikov, Phys. Met. and Met. 13, 823 (1962)"
     ]
   }

Table 3, p\. 1106 \(fourth block, 'TABLE 3\. Au, GOLD \(Continued\)'\)\: k of gold, 1050\-4000 cm\-1 \(9\.5\-2\.5 um\), 12 rows, from 'G\. A\. Bolotin, A\. N\. Voloshinskii, M\. M\. Neskov, A\. V\. Sokolov, and B\. A\. Charikov, Phys\. Met\. and Met\. 13, 823 \(1962\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/eps1\_Au\_bolotin
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Au_bolotin",
     "material": "Au",
     "file": "Au/ordal_1983__eps1_Au_bolotin.csv",
     "table": "tbl_7bbc87402022",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "G. A. Bolotin, A. N. Voloshinskii, M. M. Neskov, A. V. Sokolov, and B. A. Charikov, Phys. Met. and Met. 13, 823 (1962)"
     ]
   }

Table 3, p\. 1106 \(fourth block, 'TABLE 3\. Au, GOLD \(Continued\)'\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 12 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Au\_bolotin
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Au_bolotin",
     "material": "Au",
     "file": "Au/ordal_1983__eps2_Au_bolotin.csv",
     "table": "tbl_7bbc87402022",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "G. A. Bolotin, A. N. Voloshinskii, M. M. Neskov, A. V. Sokolov, and B. A. Charikov, Phys. Met. and Met. 13, 823 (1962)"
     ]
   }

Table 3, p\. 1106 \(fourth block, 'TABLE 3\. Au, GOLD \(Continued\)'\)\: epsilon\_2, 12 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Au\_brandli
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Au_brandli",
     "material": "Au",
     "file": "Au/ordal_1983__n_Au_brandli.csv",
     "table": "tbl_d3ef91129a37",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "G. Brandli and A. J. Sievers, Phy. Rev. B 5, 3550 (1972)"
     ]
   }

Table 3, p\. 1107 \(first block, 'TABLE 3\. Au, Gold \(Continued\)'; unlabelled in the library\)\: n of gold, 31\.4\-150 cm\-1 \(318\-66\.7 um\), 14 rows, from 'G\. Brandli and A\. J\. Sievers, Phy\. Rev\. B 5, 3550 \(1972\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. Brandli and Sievers 'reported values of R\(omega\)/Z\_0' \(the far\-infrared surface resistance, p\. 1118\); Ordal et al\. do not say how n and k were obtained from it\. The rows scatter \(\-epsilon\_1 8\.62E\+04, 8\.74E\+04, 9\.47E\+04, 9\.18E\+04 \.\.\.\), as measured data would\.

ordal\_1983/k\_Au\_brandli
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Au_brandli",
     "material": "Au",
     "file": "Au/ordal_1983__k_Au_brandli.csv",
     "table": "tbl_d3ef91129a37",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "G. Brandli and A. J. Sievers, Phy. Rev. B 5, 3550 (1972)"
     ]
   }

Table 3, p\. 1107 \(first block, 'TABLE 3\. Au, Gold \(Continued\)'; unlabelled in the library\)\: k of gold, 31\.4\-150 cm\-1 \(318\-66\.7 um\), 14 rows, from 'G\. Brandli and A\. J\. Sievers, Phy\. Rev\. B 5, 3550 \(1972\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. See the n dataset's notes\.

ordal\_1983/eps1\_Au\_brandli
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Au_brandli",
     "material": "Au",
     "file": "Au/ordal_1983__eps1_Au_brandli.csv",
     "table": "tbl_d3ef91129a37",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "G. Brandli and A. J. Sievers, Phy. Rev. B 5, 3550 (1972)"
     ]
   }

Table 3, p\. 1107 \(first block, 'TABLE 3\. Au, Gold \(Continued\)'; unlabelled in the library\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 14 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Au\_brandli
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Au_brandli",
     "material": "Au",
     "file": "Au/ordal_1983__eps2_Au_brandli.csv",
     "table": "tbl_d3ef91129a37",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "G. Brandli and A. J. Sievers, Phy. Rev. B 5, 3550 (1972)"
     ]
   }

Table 3, p\. 1107 \(first block, 'TABLE 3\. Au, Gold \(Continued\)'; unlabelled in the library\)\: epsilon\_2, 14 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Au\_weaver
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Au_weaver",
     "material": "Au",
     "file": "Au/ordal_1983__n_Au_weaver.csv",
     "table": "tbl_21d434b5eb92",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "weaver_1981"
     ]
   }

Table 3, p\. 1107 \(second block, 'TABLE 3\. Au, Gold \(Continued\)'; unlabelled in the library\)\: n of gold, 807\-16100 cm\-1 \(12\.4\-0\.62 um\), 21 rows, from 'J\. H\. Weaver, C\. Krafka, D\. W\. Lynch, and E\. E\. Koch \(with C\. G\. Olson\), Physics Data, Optical Properties of Metals, \(Fach\-Information Zentrum, Kalsrube, FOR, 1981\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. Weaver et al\.'s gold table \(Physics Data 18\-2, p\. 64\: 'Unpublished reflectance data for electropolished Au\(110\) by J\.H\. Weaver \(0\.2 \<= hv \<= 4 eV\) and C\.G\. Olson and D\.W\. Lynch \(~4 \<= hv \<= 30 eV\)\. Optical constants determined by Kramers\-Kronig analysis'\), 0\.1\-2\.0 eV in 0\.05 eV steps to 1\.0 eV, then 1\.5 and 2\.0 eV\: n and k equal that page's at all 21 energies \(n to the page's two decimals, k rounded to three figures; checked on the scan from J\. H\. Weaver's website, 2026\-09\-28\)\. At every energy the Babar\-Weaver file's sheet JHW\-Au\-ZAED also holds \(0\.1\-eV steps; optical\-constantsCuAgAu\.xlsx, attached to babar\_2015 in the library\), n and k agree to the rounding \(e\.g\. 0\.1 eV\: 8\.1696, 82\.833 there, 8\.17, 82\.8 here; 1\.0 eV\: 0\.1264, 8\.0303 there, 0\.13, 8\.03 here\); epsilon here is recomputed from the rounded n, k \(1\.0 eV\: epsilon\_2 = 2\.09 = 2 x 0\.13 x 8\.03, where the sheet has 2\.03\)\.

ordal\_1983/k\_Au\_weaver
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Au_weaver",
     "material": "Au",
     "file": "Au/ordal_1983__k_Au_weaver.csv",
     "table": "tbl_21d434b5eb92",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "weaver_1981"
     ]
   }

Table 3, p\. 1107 \(second block, 'TABLE 3\. Au, Gold \(Continued\)'; unlabelled in the library\)\: k of gold, 807\-16100 cm\-1 \(12\.4\-0\.62 um\), 21 rows, from 'J\. H\. Weaver, C\. Krafka, D\. W\. Lynch, and E\. E\. Koch \(with C\. G\. Olson\), Physics Data, Optical Properties of Metals, \(Fach\-Information Zentrum, Kalsrube, FOR, 1981\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. See the n dataset's notes\.

ordal\_1983/eps1\_Au\_weaver
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Au_weaver",
     "material": "Au",
     "file": "Au/ordal_1983__eps1_Au_weaver.csv",
     "table": "tbl_21d434b5eb92",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "weaver_1981"
     ]
   }

Table 3, p\. 1107 \(second block, 'TABLE 3\. Au, Gold \(Continued\)'; unlabelled in the library\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 21 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Au\_weaver
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Au_weaver",
     "material": "Au",
     "file": "Au/ordal_1983__eps2_Au_weaver.csv",
     "table": "tbl_21d434b5eb92",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "weaver_1981"
     ]
   }

Table 3, p\. 1107 \(second block, 'TABLE 3\. Au, Gold \(Continued\)'; unlabelled in the library\)\: epsilon\_2, 21 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Ag\_bennett
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Ag_bennett",
     "material": "Ag",
     "file": "Ag/ordal_1983__n_Ag_bennett.csv",
     "table": "tbl_ea7ae411dc7b",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "H. E. Bennett and J. M. Bennett in Optical Properties and Electronic Structure of Metals and Alloys, edited by F. Abeles (North-Holland, Amsterdam, 1966), p. 175"
     ]
   }

Table 5, p\. 1108 \(second block, 'TABLE 5\. Ag, SILVER'; unlabelled in the library\)\: n of silver, 313\-5000 cm\-1 \(32\-2 um\), 19 rows, from 'H\. E\. Bennett and J\. M\. Bennett in Optical Properties and Electronic Structure of Metals and Alloys, edited by F\. Abeles \(North\-Holland, Amsterdam, 1966\), p\. 175' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. A DRUDE CURVE, NOT MEASURED POINTS\: every row gives, by Ordal's Eqs\. \(12\)\-\(13\), omega\_tau = 144\.8\-146\.1 cm\-1 and omega\_p = 72,360\-72,710 cm\-1, constant to the printed rounding \(Ordal's Ref\. 5\: omega\_tau estimated at 145 cm\-1 for Ag, one free electron per atom\)\.

ordal\_1983/k\_Ag\_bennett
~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Ag_bennett",
     "material": "Ag",
     "file": "Ag/ordal_1983__k_Ag_bennett.csv",
     "table": "tbl_ea7ae411dc7b",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "H. E. Bennett and J. M. Bennett in Optical Properties and Electronic Structure of Metals and Alloys, edited by F. Abeles (North-Holland, Amsterdam, 1966), p. 175"
     ]
   }

Table 5, p\. 1108 \(second block, 'TABLE 5\. Ag, SILVER'; unlabelled in the library\)\: k of silver, 313\-5000 cm\-1 \(32\-2 um\), 19 rows, from 'H\. E\. Bennett and J\. M\. Bennett in Optical Properties and Electronic Structure of Metals and Alloys, edited by F\. Abeles \(North\-Holland, Amsterdam, 1966\), p\. 175' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. See the n dataset's notes\.

ordal\_1983/eps1\_Ag\_bennett
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Ag_bennett",
     "material": "Ag",
     "file": "Ag/ordal_1983__eps1_Ag_bennett.csv",
     "table": "tbl_ea7ae411dc7b",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "H. E. Bennett and J. M. Bennett in Optical Properties and Electronic Structure of Metals and Alloys, edited by F. Abeles (North-Holland, Amsterdam, 1966), p. 175"
     ]
   }

Table 5, p\. 1108 \(second block, 'TABLE 5\. Ag, SILVER'; unlabelled in the library\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 19 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Ag\_bennett
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Ag_bennett",
     "material": "Ag",
     "file": "Ag/ordal_1983__eps2_Ag_bennett.csv",
     "table": "tbl_ea7ae411dc7b",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "H. E. Bennett and J. M. Bennett in Optical Properties and Electronic Structure of Metals and Alloys, edited by F. Abeles (North-Holland, Amsterdam, 1966), p. 175"
     ]
   }

Table 5, p\. 1108 \(second block, 'TABLE 5\. Ag, SILVER'; unlabelled in the library\)\: epsilon\_2, 19 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Ag\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Ag_schulz",
     "material": "Ag",
     "file": "Ag/ordal_1983__n_Ag_schulz.csv",
     "table": "tbl_3358809f5c2b",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, p. 357 and 362 (1954)"
     ]
   }

Table 5, p\. 1109 \(first block, 'TABLE 5\. Ag, SILVER \(Continued\)'; unlabelled in the library\)\: n of silver, 10500\-25000 cm\-1 \(0\.95\-0\.40 um\), 12 rows, from 'L\. G\. Schulz, J\. Opt\. Soc\. Am\. 44, p\. 357 and 362 \(1954\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. DOUBT\: at 2\.22E\+04 cm\-1 \(450 nm\) n is printed 5\.50E\-01 \(checked on the image\), ten times its neighbours \(5\.00E\-02 at 2\.00E\+04, 7\.50E\-02 at 2\.50E\+04\) and ten times what silver's other tables give there \(Babar and Weaver about 0\.05\); the row's epsilon\_2, 2\.66 against 0\.287 and 0\.290 on either side, is 2nk with it, and \-epsilon\_1, 5\.55, is k^2 \- n^2 with it \(n = 0\.055 would give 0\.266 and 5\.85\), so a slip, if it is one, came before Ordal et al\.'s conversion\. Schulz's paper is not in the library\: kept as printed\.

ordal\_1983/k\_Ag\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Ag_schulz",
     "material": "Ag",
     "file": "Ag/ordal_1983__k_Ag_schulz.csv",
     "table": "tbl_3358809f5c2b",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, p. 357 and 362 (1954)"
     ]
   }

Table 5, p\. 1109 \(first block, 'TABLE 5\. Ag, SILVER \(Continued\)'; unlabelled in the library\)\: k of silver, 10500\-25000 cm\-1 \(0\.95\-0\.40 um\), 12 rows, from 'L\. G\. Schulz, J\. Opt\. Soc\. Am\. 44, p\. 357 and 362 \(1954\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\.

ordal\_1983/eps1\_Ag\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Ag_schulz",
     "material": "Ag",
     "file": "Ag/ordal_1983__eps1_Ag_schulz.csv",
     "table": "tbl_3358809f5c2b",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, p. 357 and 362 (1954)"
     ]
   }

Table 5, p\. 1109 \(first block, 'TABLE 5\. Ag, SILVER \(Continued\)'; unlabelled in the library\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 12 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Ag\_schulz
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Ag_schulz",
     "material": "Ag",
     "file": "Ag/ordal_1983__eps2_Ag_schulz.csv",
     "table": "tbl_3358809f5c2b",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "L. G. Schulz, J. Opt. Soc. Am. 44, p. 357 and 362 (1954)"
     ]
   }

Table 5, p\. 1109 \(first block, 'TABLE 5\. Ag, SILVER \(Continued\)'; unlabelled in the library\)\: epsilon\_2, 12 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/n\_Ag\_hagemann
~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "n_Ag_hagemann",
     "material": "Ag",
     "file": "Ag/ordal_1983__n_Ag_hagemann.csv",
     "table": "tbl_b0d84ee51ea1",
     "quantity": "refractive_index",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "hagemann_1975",
       "hagemann_1974"
     ]
   }

Table 5, p\. 1109 \(second block, 'TABLE 5\. Ag, Silver \(Continued\)'\)\: n of silver, 807\-16100 cm\-1 \(12\.4\-0\.62 um\), 8 rows, from 'H\. J\. Hageman, W\. Gudat, and C\. Kunz, J\. Opt\. Soc\. Am\. 65, 742 \(1975\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. The JOSA paper has figures only; the rows are those of the DESY report SR\-74/7 \(hagemann\_1974, Table 4\) at 0\.1, 0\.2, 0\.3, 0\.4, 0\.5, 1\.0, 1\.5 and 2\.0 eV, n and k rounded \(n to two decimals\) and epsilon recomputed from them\. Against the library's reading of the report they agree to the rounding except n at 0\.1 eV \(9\.91 here, 9\.936 there\) and the report's epsilon\_2 there \(1\.75E3; 2nk = 1\.79E3\) \(the report's cells as the library reads them, checked 2026\-09\-28; see hagemann\_1974\)\.

ordal\_1983/k\_Ag\_hagemann
~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "k_Ag_hagemann",
     "material": "Ag",
     "file": "Ag/ordal_1983__k_Ag_hagemann.csv",
     "table": "tbl_b0d84ee51ea1",
     "quantity": "extinction_coefficient",
     "abscissa_unit": "cm-1",
     "use": "reproduced",
     "reproduced_from": [
       "hagemann_1975",
       "hagemann_1974"
     ]
   }

Table 5, p\. 1109 \(second block, 'TABLE 5\. Ag, Silver \(Continued\)'\)\: k of silver, 807\-16100 cm\-1 \(12\.4\-0\.62 um\), 8 rows, from 'H\. J\. Hageman, W\. Gudat, and C\. Kunz, J\. Opt\. Soc\. Am\. 65, 742 \(1975\)' \(the block's reference line, as printed\)\. A copy of another author's values \(Ordal et al\. compiled, they did not measure\)\. See the n dataset's notes\.

ordal\_1983/eps1\_Ag\_hagemann
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps1_Ag_hagemann",
     "material": "Ag",
     "file": "Ag/ordal_1983__eps1_Ag_hagemann.csv",
     "table": "tbl_b0d84ee51ea1",
     "quantity": "permittivity_real",
     "abscissa_unit": "cm-1",
     "scale": -1,
     "use": "check",
     "reproduced_from": [
       "hagemann_1975",
       "hagemann_1974"
     ]
   }

Table 5, p\. 1109 \(second block, 'TABLE 5\. Ag, Silver \(Continued\)'\)\: the column headed '\-epsilon\_1', stored as printed with scale = \-1, so the values are epsilon\_1, 8 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

ordal\_1983/eps2\_Ag\_hagemann
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "eps2_Ag_hagemann",
     "material": "Ag",
     "file": "Ag/ordal_1983__eps2_Ag_hagemann.csv",
     "table": "tbl_b0d84ee51ea1",
     "quantity": "permittivity_imaginary",
     "abscissa_unit": "cm-1",
     "use": "check",
     "reproduced_from": [
       "hagemann_1975",
       "hagemann_1974"
     ]
   }

Table 5, p\. 1109 \(second block, 'TABLE 5\. Ag, Silver \(Continued\)'\)\: epsilon\_2, 8 rows\. Ordal et al\.'s conversion of the block's n and k \('All data in the form of n and k were changed to epsilon\_1 and epsilon\_2', p\. 1116\), agreeing with them to the printed rounding in every row\: a check on the n and k datasets, not an independent value\.

Formulas
--------

ordal\_1983/drude\_Al
~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "drude_Al",
     "material": "Al",
     "equation": "Eq. (2), p. 1099, with Table 13, p. 1118",
     "printed": "epsilon_c = epsilon_inf - omega_p^2 / (omega^2 + i omega omega_tau); Table 13, Al: omega_f (cm-1) for fit of data in IR 1.11x10^3; omega_tau (cm-1) IR fit 6.47x10^2; omega_p (cm-1) IR fit 1.19x10^5; -epsilon_1(0) = -(omega_p/omega_tau)^2 3.37x10^4; omega_tau (cm-1) from dc resistivities and omega_p 6.45x10^2; omega_tau (cm-1) crossover on -epsilon_1, epsilon_2 plot 7.00x10^2",
     "variable": "omega: wavenumber in cm-1; epsilon_inf = 1 (Eqs. 12-13, p. 1116, use 1 - epsilon_1)",
     "range": "The infrared of Fig. 1 (the fit is forced at omega_f = 1.11x10^3 cm-1); 'The high frequency termination occurs where the Drude model becomes invalid' (p. 1118)",
     "coefficients": {
       "omega_tau": "6.47x10^2",
       "omega_p": "1.19x10^5"
     },
     "check": "(omega_p/omega_tau)^2 = 33,829 against the printed -epsilon_1(0) = 3.37x10^4 (0.4 %, the parameters' rounding). At 1110 cm-1 the formula gives -epsilon_1 = 8,578, epsilon_2 = 5,000 against Bennett and Bennett's block 8.41E+03, 5.02E+03 (+2.0 %, -0.4 %); at 313 cm-1, +5 % and +2 %. Against Shiles et al.'s block it is 15-40 % off (1050 cm-1: 9,309 + 5,737i against 6.93E+03 + 4.07E+03i). Checked 2026-09-28."
   }

A fit by eye to the compiled data \(Sec\. III\); in effect it follows Bennett and Bennett's Drude curve \(record notes\)\. Superseded by ordal\_1985/drude\_Al \(omega\_tau 660, omega\_p 119,000 cm\-1\)\.

ordal\_1983/drude\_Cu
~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "drude_Cu",
     "material": "Cu",
     "equation": "Eq. (2), p. 1099, with Table 13, p. 1118",
     "printed": "epsilon_c = epsilon_inf - omega_p^2 / (omega^2 + i omega omega_tau); Table 13, Cu: omega_f 2.00x10^3; omega_tau (IR fit) 2.78x10^2; omega_p (IR fit) 6.38x10^4; -epsilon_1(0) 5.27x10^4; omega_tau from dc resistivities and omega_p 1.15x10^2; omega_tau crossover 2.55x10^2 (cm-1)",
     "variable": "omega: wavenumber in cm-1; epsilon_inf = 1 (Eqs. 12-13, p. 1116)",
     "range": "The infrared of Fig. 2 (the fit is forced at omega_f = 2.00x10^3 cm-1)",
     "coefficients": {
       "omega_tau": "2.78x10^2",
       "omega_p": "6.38x10^4"
     },
     "check": "(omega_p/omega_tau)^2 = 52,669 against the printed 5.27x10^4. At the forced frequency, 2000 cm-1, the formula gives -epsilon_1 = 997, epsilon_2 = 138.8 against Lenham and Treherne's block 1.00E+03, 1.40E+02 (-0.3 %, -0.9 %); at 500 cm-1 it is 8-9 % low and at 1000 cm-1 epsilon_2 is 25 % low; Dold and Mecke's block lies 30-40 % below it in -epsilon_1 (1000-5000 cm-1). Checked 2026-09-28."
   }

Revised in ordal\_1985 \(omega\_tau 73\.2, omega\_p 59,600 cm\-1\) after the authors' own Cu measurements \('Cu caused a revision in the Drude model parameters presented in our previous tabulation', ordal\_1985 p\. 4498\)\.

ordal\_1983/drude\_Au
~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "drude_Au",
     "material": "Au",
     "equation": "Eq. (2), p. 1099, with Table 13, p. 1118",
     "printed": "epsilon_c = epsilon_inf - omega_p^2 / (omega^2 + i omega omega_tau); Table 13, Au: omega_f 8.06x10^2; omega_tau (IR fit) 2.16x10^2; omega_p (IR fit) 7.25x10^4; -epsilon_1(0) 1.13x10^5; omega_tau from dc resistivities and omega_p 1.93x10^2; omega_tau crossover 2.16x10^2 (cm-1)",
     "variable": "omega: wavenumber in cm-1; epsilon_inf = 1 (Eqs. 12-13, p. 1116)",
     "range": "The infrared of Fig. 3; omega_tau from Brandli and Sievers's far-infrared surface resistance with omega_p from the near-infrared fit (p. 1118)",
     "coefficients": {
       "omega_tau": "2.16x10^2",
       "omega_p": "7.25x10^4"
     },
     "check": "(omega_p/omega_tau)^2 = 112,660 against the printed 1.13x10^5. At 833 cm-1 the formula gives -epsilon_1 = 7,097, epsilon_2 = 1,840 against Bennett and Bennett's block 7.14E+03, 1.84E+03 (-0.6 %, 0.0 %), within 1.5 % over that block (313-3330 cm-1); against Weaver et al.'s block it is 11 % high in -epsilon_1 and 49 % in epsilon_2 at 807 cm-1, and against Brandli and Sievers's +28 % / +22 % at 31.4 cm-1 and -12 % / +4 % at 100 cm-1. Checked 2026-09-28."
   }

For gold \(and lead\) omega\_tau is the value from Eq\. \(14\) and Brandli and Sievers's R\(omega\)/Z\_0, not the near\-infrared fit's \(p\. 1118\)\. Superseded by ordal\_1985/drude\_Au \(215, 72,800\)\.

ordal\_1983/drude\_Ag
~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "drude_Ag",
     "material": "Ag",
     "equation": "Eq. (2), p. 1099, with Table 13, p. 1118",
     "printed": "epsilon_c = epsilon_inf - omega_p^2 / (omega^2 + i omega omega_tau); Table 13, Ag: omega_f 1.00x10^3; omega_tau (IR fit) 1.45x10^2; omega_p (IR fit) 7.25x10^4; -epsilon_1(0) 2.50x10^5; omega_tau from dc resistivities and omega_p 1.41x10^2; omega_tau crossover 1.52x10^2 (cm-1)",
     "variable": "omega: wavenumber in cm-1; epsilon_inf = 1 (Eqs. 12-13, p. 1116)",
     "range": "The infrared of Fig. 5 (the fit is forced at omega_f = 1.00x10^3 cm-1)",
     "coefficients": {
       "omega_tau": "1.45x10^2",
       "omega_p": "7.25x10^4"
     },
     "check": "(omega_p/omega_tau)^2 = 250,000, the printed 2.50x10^5. At the forced frequency, 1000 cm-1, the formula gives -epsilon_1 = 5,147, epsilon_2 = 746.5 against Bennett and Bennett's block 5.14E+03, 7.49E+02 (+0.1 %, -0.3 %), within 1 % over that block (313-5000 cm-1); Hagemann et al.'s block has epsilon_2 21 % (807 cm-1) to 53 % (4030 cm-1) above it. Checked 2026-09-28."
   }

Superseded by ordal\_1985/drude\_Ag \(145, 72,700\)\.

Corrections
-----------

No dataset errata are recorded in this source record.

Formula corrections, where recorded, appear with their formulas above. Curation notes may also discuss corrections or unresolved interpretation. Consult the :doc:`review register </register>` for the checks and decisions.