hafnium tetrachloride
- Formula: Cl4Hf
- Molecular weight: 320.30
- CAS Registry Number: 13499-05-3
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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 as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Chris Muzny director
AC - William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| Tc | 722.4 | K | N/A | Denisova, Safronova, et al., 1967 | Uncertainty assigned by TRC = 0.5 K; TRC |
| Tc | 725.7 | K | N/A | Nisel'son, Sokolova, et al., 1967 | Uncertainty assigned by TRC = 0.72 K; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| Pc | 57.80 | bar | N/A | Denisova, Safronova, et al., 1967 | Uncertainty assigned by TRC = 0.57 bar; TRC |
| Pc | 54.20 | bar | N/A | Nisel'son, Sokolova, et al., 1967 | Uncertainty assigned by TRC = 0.54 bar; TRC |
| Quantity | Value | Units | Method | Reference | Comment |
| ρc | 3.184 | mol/l | N/A | Nisel'son, Sokolova, et al., 1967 | Uncertainty assigned by TRC = 0.031 mol/l; TRC |
Enthalpy of sublimation
| ΔsubH (kJ/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 97.9 ± 1.2 | 499. | T | Tangri and Bose, 1994 | Based on data from 398. - 500. K.; AC |
| 107.9 ± 0.8 | 353. - 433. | N/A | Izmailovich, Khodeev, et al., 1973 | AC |
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.
Denisova, Safronova, et al., 1967
Denisova, N.D.; Safronova, E.K.; Pustil'nik, A.I.; Bystrova, O.N.,
Boundary Liqui-Vapor Curve and Saturated Vapour Pressure of Zirconium and Hafnium Tetrachlorides,
Russ. J. Phys. Chem. (Engl. Transl.), 1967, 41, 30. [all data]
Nisel'son, Sokolova, et al., 1967
Nisel'son, L.A.; Sokolova, T.D.; Stolyarov, V.I.,
Some Properties of Hafnium Tetrachloride in the Liquid and Vapor States,
Russ. J. Phys. Chem. (Engl. Transl.), 1967, 41, 884. [all data]
Tangri and Bose, 1994
Tangri, R.P.; Bose, D.K.,
Vapour pressure measurement of zirconium chloride and hafnium chloride by the transpiration technique,
Thermochimica Acta, 1994, 244, 249-256, https://doi.org/10.1016/0040-6031(94)80224-6
. [all data]
Izmailovich, Khodeev, et al., 1973
Izmailovich, A.S.; Khodeev, Y.S.; Tsirel'nikov, V.I.,
Zh. Fiz. Khim., 1973, 47, 1565. [all data]
Notes
Go To: Top, Phase change data, References
- Symbols used in this document:
Pc Critical pressure Tc Critical temperature ΔsubH Enthalpy of sublimation ρc Critical density - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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