hafnium tetrafluoride
- Formula: F4Hf
- Molecular weight: 254.48
- CAS Registry Number: 13709-52-9
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Reaction 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: John E. Bartmess
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.
Individual Reactions
+ HfF4 = (
• HfF4)
By formula: F- + HfF4 = (F- • HfF4)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 102.5 ± 4.0 | kcal/mol | TDEq | Nikitin, Igolkina, et al., 1986 | gas phase; Reanalyzed literature data, 14.1 kcal < AlF3; value altered from reference due to conversion from electron convention to ion convention |
| ΔrH° | 96.9 ± 2.1 | kcal/mol | TDEq | Nikitin, Sorokin, et al., 1980 | gas phase; Fluoride Affinity: 20.1 kcal < AlF3 |
Ion clustering 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: John E. Bartmess
Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.
Clustering reactions
+ HfF4 = (
• HfF4)
By formula: F- + HfF4 = (F- • HfF4)
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔrH° | 102.5 ± 4.0 | kcal/mol | TDEq | Nikitin, Igolkina, et al., 1986 | gas phase; Reanalyzed literature data, 14.1 kcal < AlF3; value altered from reference due to conversion from electron convention to ion convention |
| ΔrH° | 96.9 ± 2.1 | kcal/mol | TDEq | Nikitin, Sorokin, et al., 1980 | gas phase; Fluoride Affinity: 20.1 kcal < AlF3 |
References
Go To: Top, Reaction thermochemistry data, Ion clustering data, NIST Free Links, Notes
Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.
Nikitin, Igolkina, et al., 1986
Nikitin, M.I.; Igolkina, N.A.; Skokan, E.V.; Sorokin, I.D.; Sidirov, L.N.,
Enthalpies of formation of the AlF4- ion,
J. Phys. Chem., 1986, 60, 22. [all data]
Nikitin, Sorokin, et al., 1980
Nikitin, M.I.; Sorokin, I.D.; Skokan, E.V.; Sidorov, L.N.,
Negative Ions in the Saturated Vapors of the Potassium Fluoride - Hafnium Tetrafluoride and Potassium Fluoride - Beryllium Difluoride Systems,
Russ. J. Phys. Chem., 1980, 54, page]. [all data]
Notes
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- Symbols used in this document:
ΔrH° Enthalpy of reaction at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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