diamond
- Formula: C
- Molecular weight: 12.0107
- IUPAC Standard InChI: InChI=1S/C
- IUPAC Standard InChIKey: OKTJSMMVPCPJKN-UHFFFAOYSA-N
- CAS Registry Number: 7782-40-3
- Chemical structure:
This structure is also available as a 2d Mol file - Species with the same structure:
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Condensed phase thermochemistry data
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Data compiled by: Eugene S. Domalski and Elizabeth D. Hearing
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| S°solid,1 bar | 0.0720 | J/mol*K | N/A | Desnoyers and Morrison, 1958 | Agreement with DeSorbo (1953) data above 100 K. |
| S°solid,1 bar | 2.3782 | J/mol*K | N/A | DeSorbo, 1953 | |
| S°solid,1 bar | 2.448 | J/mol*K | N/A | Pitzer, 1938 | Extrapolation below 70.8 K, 0.0322 J/mol*K. |
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 6.57 | 300. | Volga, Buchnev, et al., 1976 | T = 300 to 1200 K. Natural diamond; Cp calculated by extrapolation of value at 350 K. |
| 6.61 | 300. | Volga, Buchnev, et al., 1976 | T = 75 to 1200 K. SAM synthetic diamond. |
| 6.37 | 300. | Volga, Buchnev, et al., 1976 | T = 75 to 1200 K. Ballas synthetic diamond. |
| 6.117 | 298.15 | Victor, 1962 | T = 273 to 1073 K. |
| 5.3078 | 277.68 | Desnoyers and Morrison, 1958 | T = 13 to 277 K. Value is unsmoothed experimental datum. |
| 6.1149 | 298.16 | DeSorbo, 1953 | T = 25 to 300 K. |
| 5.669 | 287.96 | Pitzer, 1938 | T = 70 to 288 K. Value is unsmoothed experimental datum. |
| 6.081 | 295. | Robertson, Fox, et al., 1936 | T = 90 to 320 K. Type 1, homogeneous; Cp = 5.930 J/mol*K for Type 2, mosaic structure. |
References
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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Desnoyers and Morrison, 1958
Desnoyers, J.E.; Morrison, J.A.,
The heat capacity of diamond between 12.8° and 277°K,
Phil. Mag. [8]3, 1958, 42-48. [all data]
DeSorbo, 1953
DeSorbo, W.,
Specific heat of diamond at low temperatures,
J. Chem. Phys., 1953, 21, 876-880. [all data]
Pitzer, 1938
Pitzer, K.S.,
The heat capacity of diamond from 70 to 300 K,
J. Chem. Phys., 1938, 6, 68-70. [all data]
Volga, Buchnev, et al., 1976
Volga, V.I.; Buchnev, L.M.; Markelov, N.V.; Dymov, B.K.,
Enthalpy and heat capacity of diamonds over a wide range of temperatures,
Sint. Almazy, 1976, (3), 9-11. [all data]
Victor, 1962
Victor, A.C.,
Heat capacity of diamond at high temperatures,
J. Chem. Phys., 1962, 36, 1903-1911. [all data]
Robertson, Fox, et al., 1936
Robertson, R.; Fox, J.J.; Martin, A.E.,
Further work on two types of diamond,
Proc. Royal Soc. (London), 1936, 157A, 579-593. [all data]
Notes
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- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid S°solid,1 bar Entropy of solid at standard conditions (1 bar) - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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