Pyridium hexafluorophosphate
- Formula: C5H6F6NP
- Molecular weight: 225.0720
- IUPAC Standard InChI: InChI=1S/C5H5N.F6P/c1-2-4-6-5-3-1;1-7(2,3,4,5)6/h1-5H;/q;-1/p+1
- IUPAC Standard InChIKey: LWZCEHOZEYVSRX-UHFFFAOYSA-O
- CAS Registry Number: 16941-15-4
- Chemical 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
Constant pressure heat capacity of solid
| Cp,solid (J/mol*K) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 243.6 | 299.27 | Hanaya, Ohta, et al., 1993 | T = 4 to 320 K. Unsmoothed experimental datum. |
Phase change 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
Enthalpy of phase transition
| ΔHtrs (kJ/mol) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 5.040 | 217.83 | crystaline, II | crystaline, I | Hanaya, Ohta, et al., 1993 | Assumption A. |
| 9.740 | 217.83 | crystaline, II | crystaline, I | Hanaya, Ohta, et al., 1993 | Assumption B. |
Entropy of phase transition
| ΔStrs (J/mol*K) | Temperature (K) | Initial Phase | Final Phase | Reference | Comment |
|---|---|---|---|---|---|
| 25.0 | 217.83 | crystaline, II | crystaline, I | Hanaya, Ohta, et al., 1993 | Assumption |
| 36.0 | 217.83 | crystaline, II | crystaline, I | Hanaya, Ohta, et al., 1993 | Assumption |
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.
Hanaya, Ohta, et al., 1993
Hanaya, M.; Ohta, N.; Oguni, M.,
Calorimetric study of phase transitions in pyridinium iodide and pyridinium hexafluorophospate crystals,
J. Phys. Chem. Solids, 1993, 54, 263-269. [all data]
Notes
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- Symbols used in this document:
Cp,solid Constant pressure heat capacity of solid ΔHtrs Enthalpy of phase transition ΔStrs Entropy of phase transition - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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