copeland_1976
=============

T\. G\. Copeland and R\. H\. Cole, "Dielectric and pressure virial coefficients of imperfect gases\. VII\. CF3H\-Ar and CFH3\-Ar mixtures", J\. Chem\. Phys\. 64, 1747 \(1976\)

`Source record <https://github.com/LupoLab/optmat/blob/main/src/optmat/data/sources/copeland_1976.toml>`__ · :doc:`Catalogue </the-data/sources>` · :doc:`Review register </register>`

DOI: `10\.1063/1\.432350 <https://doi.org/10.1063/1.432350>`__

**Source kind:** measurement

**Recorded technique:** Relative permittivity of CF3H\-Ar and CFH3\-Ar mixtures \(and pure argon\) at 50\.0 degrees C \(NBS\-calibrated thermometer, 0\.1 degrees C absolute; gradients \< 0\.05 degrees C\)\: three\-terminal parallel\-plate cells \(Orcutt and Cole; 98 pF, stable to 2 ppm\) and a transformer bridge \(General Radio 1493, 0\.1 ppm relative\)\. B\_eps/A\_eps^2 from the cyclic expansion method with two or three cells from 40\-200 atm; A\_eps and B\_p from low\-pressure data \(Texas Instruments 0\-100 psi quartz spiral gauge\), \[\(eps \- 1\)/\(eps \+ 2\)\]\(RT/P\) = A\_eps \+ \(B\_eps \- A\_eps B\_p\)\(P/RT\) \(Eq\. 2\)\. Mixture viscosities at 25 degrees C by a capillary viscometer \(pp\. 2\-3\)\.

**Materials in structured entries:** Ar

**Dataset quantities:** molar\_refractivity, refractivity\_virial\_coefficient

**Contents:** 3 datasets; 0 formulas.

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

Identity checked against the first page \(pdf page 1 is the publisher's cover; journal pp\. 1747\-1751 = pdf pages 2\-6\)\. Page numbers below are pdf pages\.

SCOPE\. Argon only\: CF3H and CFH3 are not curated species\. Table I's first row \(mole fraction 0\) is pure argon\: this work's A\_eps = 4\.1406 \+\- 0\.0014 cm^3/mole and, in parentheses, Bose and Cole's \(1970\) A\_eps = 4\.1396 \+\- 0\.0006 and B\_eps = 0\.72 \+\- 0\.12 cm^6/mole^2 \(footnote a\: 'Values from T\. K\. Bose and R\. H\. Cole, J\. Chem\. Phys\. 52, 140 \(1970\)'; bose\_1970, whose A\_eps is 4\.1397 \+\- 0\.0006\: re\-pointed 2026\-09\-27\); this work's pure\-argon B\_eps and C\_eps are not given \('\.\.\.'\)\. The text \(p\. 2\) uses 'A\_eps1 = 4\.140 cm^3/mole for argon' to compute the mixtures' mole fractions\. 'The small differences are accounted for by slight irreproducibility of the cells used by Sutter and a suspected slight impurity of the CFH3 used in this work' \(p\. 3; said of the pure components generally\)\.

WHAT A\_eps IS\. f = \(eps \- 1\)/\(eps \+ 2\) = A\_eps \(n/V\) \+ B\_eps \(n/V\)^2 \+ \.\.\. \(Eq\. 1\), static \(bridge frequency\); for argon the electronic static polarizability\. B\_eps is the static dielectric second virial coefficient \(for argon an induction term only, no orientation part\)\.

UNCERTAINTY\. The \+\- of Tables I and II are not described anywhere in the paper \(level 'not stated'\); the group's other papers quote three standard deviations\.

Not extracted\: the mixture rows of Tables I and II \(A\_eps, B\_eps, C\_eps, B\_p\), argon's B\_p \(\-11\.6 \+\- 1\.5 cm^3/mole, no quantity\), the mixed B\_eps12 and B\_p12, the viscosities \(Table III\: argon 226\.2 x 1e\-6 P at 25 degrees C\) and Table IV's model parameters \(argon alpha = 1\.64e\-24 cm^3, an input to the calculations; 4\.1406 cm^3/mol is 1\.6413e\-24 cm^3, computed 2026\-09\-26\)\.

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

Datasets
--------

copeland\_1976/A\_eps\_Ar
~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "A_eps_Ar",
     "material": "Ar",
     "file": "Ar/copeland_1976__A_eps_Ar.csv",
     "table": "tbl_a066d6e5d380",
     "quantity": "molar_refractivity",
     "unit": "cm3/mol",
     "abscissa_unit": "nm",
     "use": "check",
     "uncertainty": {
       "column": true,
       "level": "not stated"
     },
     "parameters": {
       "temperature_k": 323.15
     }
   }

Table I, mole fraction 0 \(pure argon\)\: A\_eps = 4\.1406 \+\- 0\.0014 cm^3/mole at 50 degrees C \(row = temperature, K\), this work, static dielectric\: the electronic polarizability of argon\. 0\.03 % below schmidt\_2003's 4\.14203 \(19\)\. A check\. Level not stated\.

copeland\_1976/A\_eps\_bose\_cole\_Ar
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "A_eps_bose_cole_Ar",
     "material": "Ar",
     "file": "Ar/copeland_1976__A_eps_bose_cole_Ar.csv",
     "table": "tbl_a066d6e5d380",
     "quantity": "molar_refractivity",
     "unit": "cm3/mol",
     "abscissa_unit": "nm",
     "use": "reproduced",
     "reproduced_from": [
       "bose_1970"
     ],
     "uncertainty": {
       "column": true,
       "level": "3 sigma"
     }
   }

Table I, pure argon, in parentheses \(footnote a\)\: A\_eps = 4\.1396 \+\- 0\.0006 cm^3/mole, Bose and Cole \(1970\) = bose\_1970 \(re\-pointed 2026\-09\-27\), static dielectric\. The original prints 4\.1397 \+\- 0\.0006 at 49\.7 degrees C\: this reprint is one lower in the last digit \(image of both tables checked; kept as printed\)\. The original's errors are three standard deviations\: level corrected to '3 sigma'\.

copeland\_1976/B\_eps\_bose\_cole\_Ar
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

.. code-block:: text

   {
     "id": "B_eps_bose_cole_Ar",
     "material": "Ar",
     "file": "Ar/copeland_1976__B_eps_bose_cole_Ar.csv",
     "table": "tbl_a066d6e5d380",
     "quantity": "refractivity_virial_coefficient",
     "unit": "cm6/mol2",
     "abscissa_unit": "nm",
     "use": "reproduced",
     "reproduced_from": [
       "bose_1970"
     ],
     "uncertainty": {
       "column": true,
       "level": "3 sigma"
     },
     "parameters": {
       "order": 2
     }
   }

Table I, pure argon, in parentheses \(footnote a\)\: B\_eps = 0\.72 \+\- 0\.12 cm^6/mole^2, Bose and Cole \(1970\) = bose\_1970 \(re\-pointed 2026\-09\-27; its 49\.7 degrees C value, digit for digit\)\: the static dielectric second virial coefficient \(for argon, induction only\)\. The original's errors are three standard deviations\: level corrected to '3 sigma'\.

Formulas
--------

No formulas are recorded.

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.