Potassium fluoride


Gas 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.

Quantity Value Units Method Reference Comment
Δfgas-326.77kJ/molReviewChase, 1998Data last reviewed in June, 1969
Quantity Value Units Method Reference Comment
gas,1 bar226.60J/mol*KReviewChase, 1998Data last reviewed in June, 1969

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 3000. to 6000.
A 37.20911
B 0.861908
C -0.047662
D 0.004070
E -0.201727
F -338.5785
G 270.2433
H -326.7704
ReferenceChase, 1998
Comment Data last reviewed in June, 1969

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 as indicated in comments:
B - John E. Bartmess
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias

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Individual Reactions

Fluorine anion + Potassium fluoride = (Fluorine anion • Potassium fluoride)

By formula: F- + FK = (F- • FK)

Quantity Value Units Method Reference Comment
Δr223.8 ± 3.3kJ/molTDAsNikitin, Sidorov, et al., 1981gas phase; value altered from reference due to conversion from electron convention to ion convention; B
Δr200. ± 4.2kJ/molTDEqSidorov, Nikitin, et al., 1980gas phase; Fluoride Affinity:1100K, ΔHf(KF2-):298K; value altered from reference due to conversion from electron convention to ion convention; B
Δr>220. ± 21.kJ/molTDEqGusarov, Gorokhov, et al., 1979gas phase; value altered from reference due to conversion from electron convention to ion convention; B
Δr194.kJ/molMSNikitin, Skokan, et al., 1979gas phase; Knudsen cell; M

AlF4- + Potassium fluoride = (AlF4- • Potassium fluoride)

By formula: AlF4- + FK = (AlF4- • FK)

Quantity Value Units Method Reference Comment
Δr120. ± 8.4kJ/molTDAsGusarov, Gorokhov, et al., 1979gas phase; value altered from reference due to conversion from electron convention to ion convention; B

Be2F5- + Potassium fluoride = (Be2F5- • Potassium fluoride)

By formula: Be2F5- + FK = (Be2F5- • FK)

Quantity Value Units Method Reference Comment
Δr290. ± 10.kJ/molN/ANikitin, Sorokin, et al., 1980gas phase; value altered from reference due to conversion from electron convention to ion convention; B

Gas phase ion energetics 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:
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

Electron affinity determinations

EA (eV) Method Reference Comment
0.23NBAEDe Vreugd, Wijnaendts van Resandt, et al., 1979B
<1.5004IMRESidorov, Skokan, et al., 1980B
1.04 ± 0.21EIAEShevchenko, Iljin, et al., 1976From K2BO2F; value altered from reference due to conversion from electron convention to ion convention; B
>1.25999EIAEEbinghaus, 1964From (KF)2; B

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
K+9.8FEISchafer and Rabeneck, 1987LBLHLM
K+9.54 ± 0.20FEIShevchenko, Iljin, et al., 1976LLK
K+9.5 ± 0.3FEIHastie, Zmbov, et al., 1968RDSH

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Nikitin, Sidorov, et al., 1981
Nikitin, M.I.; Sidorov, L.N.; Skokan, E.V.; Sorokin, I.D., Mass spectrometric determination of the heats of formation of ScF4- and KF2-, Russ. J. Phys. Chem., 1981, 55, 1107. [all data]

Sidorov, Nikitin, et al., 1980
Sidorov, L.N.; Nikitin, M.I.; Skokan, E.V.; Sorokin, I.D., Mass-spectrometric determination of enthalpies of dissociation of gaseous complex fluorides into neutral and charged particles. II. Heats of formation of AlF4- and KF2-, Int. J. Mass Spectrom. Ion Phys., 1980, 35, 203. [all data]

Gusarov, Gorokhov, et al., 1979
Gusarov, A.V.; Gorokhov, L.N.; Pyatenko, A.T.; Sidorova, I.V., Negative ions in the vapors of inorganic compounds, Adv. Mass Spectrom., 1979, 8, 262. [all data]

Nikitin, Skokan, et al., 1979
Nikitin, M.I.; Skokan, E.V.; Sorokin, I.D.; Sidorov, L.N., Sov. Phys. Dokl., 1979, 247, 594. [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]

De Vreugd, Wijnaendts van Resandt, et al., 1979
De Vreugd, C.; Wijnaendts van Resandt, R.W.; Los, J.; Smith, B., Differential Cross Sections for Collisions of Negative Halogen Ions and Alkali Atoms, Chem. Phys., 1979, 42, 3, 305, https://doi.org/10.1016/0301-0104(79)80078-6 . [all data]

Sidorov, Skokan, et al., 1980
Sidorov, L.N.; Skokan, E.V.; Nitikin, M.I.; Sorokin, I.D., Mass spectrometric determination of enthalpies of dissociation of gaseous complex fluorides into neutral and charged particles. III. Heat of formation of UF5- and electron affinity of UF5, Int. J. Mass Spectrom. Ion Phys., 1980, 35, 215. [all data]

Shevchenko, Iljin, et al., 1976
Shevchenko, V.E.; Iljin, M.K.; Nikitin, O.T.; Sidorov, L.N., Mass-spectrometric study of mixed dimers M2BO2F, Int. J. Mass Spectrom. Ion Phys., 1976, 21, 279. [all data]

Ebinghaus, 1964
Ebinghaus, H.Z., Negative Ionen aus Alkalihalogeniden und Electronenaffinitaten der Alkalimetalle und Alkalihalogenide, Z. Naturfor., 1964, 19A, 727. [all data]

Schafer and Rabeneck, 1987
Schafer, H.; Rabeneck, H., Massenspektroskopische untersuchung der borfluorid-komplexe ABF4, Z. Anorg. Allg. Chem., 1987, 545, 224. [all data]

Hastie, Zmbov, et al., 1968
Hastie, J.W.; Zmbov, K.F.; Margrave, J.L., Mass spectrometric studies at high temperatures. XXIII. Vapor equilibria over molten NaSnF3 and KSnF3, J. Inorg. Nucl. Chem., 1968, 30, 729. [all data]


Notes

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