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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
Deltafgas-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. - 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

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.

Quantity Value Units Method Reference Comment
Deltafliquid-554.47kJ/molReviewChase, 1998Data last reviewed in June, 1969
Quantity Value Units Method Reference Comment
liquid,1 bar67.63J/mol*KReviewChase, 1998Data last reviewed in June, 1969
Quantity Value Units Method Reference Comment
Deltafsolid-568.61kJ/molReviewChase, 1998Data last reviewed in June, 1969
Quantity Value Units Method Reference Comment
solid66.55J/mol*KReviewChase, 1998Data last reviewed in June, 1969

Liquid 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) 1131. - 3000.
A 71.96522
B -2.116748×10-10
C 1.309726×10-10
D -2.449678×10-11
E -4.589305×10-12
F -575.9234
G 154.7226
H -554.4679
ReferenceChase, 1998
Comment Data last reviewed in June, 1969

Solid 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) 298. - 900.900. - 1131.
A 46.53612-254.3834
B 13.96661474.8003
C -2.385212-246.4832
D 2.84467743.88472
E -0.14077043.50900
F -583.5592-398.2930
G 117.9905-212.6434
H -568.6056-568.6056
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in June, 1969 Data last reviewed in June, 1969

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.

Antoine Equation Parameters

log10(P) = A − (B / (T + C))
    P = vapor pressure (bar)
    T = temperature (K)

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Temperature (K) A B C Reference Comment
1158. - 1775.4.764637770.106-141.602Stull, 1947Coefficents calculated by NIST from author's data.

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

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

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

By formula: F- + FK = (F- bullet FK)

Quantity Value Units Method Reference Comment
Deltar223.8 ± 3.3kJ/molTDAsNikitin, Sidorov, et al., 1981gas phase; value altered from reference due to conversion from electron convention to ion convention; B
Deltar200. ± 4.2kJ/molTDEqSidorov, Nikitin, et al., 1980gas phase; Fluoride Affinity:1100K, «DELTA»Hf(KF2-):298K; value altered from reference due to conversion from electron convention to ion convention; B
Deltar>220. ± 21.kJ/molTDEqGusarov, Gorokhov, et al., 1979gas phase; value altered from reference due to conversion from electron convention to ion convention; B
Deltar194.kJ/molMSNikitin, Skokan, et al., 1979gas phase; Knudsen cell; M

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

By formula: AlF4- + FK = (AlF4- bullet FK)

Quantity Value Units Method Reference Comment
Deltar120. ± 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- bullet Potassium fluoride)

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

Quantity Value Units Method Reference Comment
Deltar290. ± 10.kJ/molN/ANikitin, Sorokin, et al., 1980gas phase; value altered from reference due to conversion from electron convention to ion convention; B

Constants of diatomic molecules

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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: Klaus P. Huber and Gerhard H. Herzberg

Data collected through January, 1977

Symbols used in the table of constants
SymbolMeaning
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for 39K19F
StateTeomegaeomegaexeomegaeyeBealphaegammaeDebetaereTrans.nu00
The electron energy loss spectrum Geiger and Pfeiffer, 1968 has peaks at 6.8, 8.5, 9.6 and 18.4, 22.5, 23.8,24.9 eV.
A 1           A larrow X 
Barrow and Caunt, 1953
X 1Sigma+ 0 428 2 (2.4)  0.279937413 2.335038E-3 3  0.04834E-5 4  2.171457 5  
Ritchie and Lew, 1964; Baikov and Vasilevskii, 1967
Rotation sp.
Grabner and Hughes, 1950; Green and Lew, 1960; Veazey and Gordy, 1965; Dijkerman, Flegel, et al., 1972
Mol. beam rf electric 6
Bonczyk and Hughes, 1967; missing citation; Van Wachem, De Leeuw, et al., 1967
and magn. reson. 7
Mehran, Brooks, et al., 1966

Notes

1Fluctuation bands, 34300 - 46700 cm-1 (absorption).
2From the IR spectrum Ritchie and Lew, 1964, Baikov and Vasilevskii, 1967. Veazey and Gordy, 1965, applying the Dunham theory to the microwave results, calculate omegae = 426.04 Veazey and Gordy, 1965 and omegaexe = 2.43 Veazey and Gordy, 1965.
3missing note
4missing note
5Rot.-vibr. sp. 9
6muel[D] = 8.5583 + 0.06841(v+1/2) + 0.000256(v+1/2)2 Graff and Runolfsson, 1963,105, electric quadrupole and other hyperfine coupling constants Schlier, 1957, Bonczyk and Hughes, 1967, missing citation; see also Grabner and Hughes, 1950, Green and Lew, 1960.
7gJ = (-)0.0364 muN Mehran, Brooks, et al., 1966.
8Thermochemical value Brewer and Brackett, 1961, Bulewicz, Phillips, et al., 1961; an upper limit, D00 leq 5.28eV, was derived Barrow and Caunt, 1953, from the analysis of the fluctuation bands.
9IR spectrum of matrix isolated KF Ismail, Hauge, et al., 1973.
10missing note

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Reaction thermochemistry data, Constants of diatomic molecules, 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]

Stull, 1947
Stull, Daniel R., Vapor Pressure of Pure Substances. Organic and Inorganic Compounds, Ind. Eng. Chem., 1947, 39, 4, 517-540, https://doi.org/10.1021/ie50448a022 . [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]

Geiger and Pfeiffer, 1968
Geiger, J.; Pfeiffer, H.-C., Untersuchung der Anregung innerer Elektronen von Alkalihalogenidmolekulen im Energieverlustspektrum von 25 keV-Elektronen, Z. Phys., 1968, 208, 105. [all data]

Barrow and Caunt, 1953
Barrow, R.F.; Caunt, A.D., The ultra-violet absorption spectra of some gaseous alkali-metal halides and the dissociation energy of fluorine, Proc. R. Soc. London A, 1953, 219, 120. [all data]

Ritchie and Lew, 1964
Ritchie, R.K.; Lew, H., Infrared spectra of NaF and KF, Can. J. Phys., 1964, 42, 43. [all data]

Baikov and Vasilevskii, 1967
Baikov, V.I.; Vasilevskii, K.P., Infrared spectra of sodium, potassium, rubidium, and cesium fluoride vapors, Opt. Spectrosc. Engl. Transl., 1967, 22, 198, In original 364. [all data]

Grabner and Hughes, 1950
Grabner, L.; Hughes, V., The radiofrequency spectrum of K39F by the electric resonance method, Phys. Rev., 1950, 79, 819. [all data]

Green and Lew, 1960
Green, G.W.; Lew, H., Rotational spectrum of K39F by the molecular beam electric resonance method, Can. J. Phys., 1960, 38, 482. [all data]

Veazey and Gordy, 1965
Veazey, S.E.; Gordy, W., Millimeter-wave molecular-beam spectroscopy: alkali fluorides, Phys. Rev. A: Gen. Phys., 1965, 138, 1303. [all data]

Dijkerman, Flegel, et al., 1972
Dijkerman, H.; Flegel, W.; Graff, G.; Monter, B., Beitrage zum Stark-Effekt der molekule 205Tl19F und 39K19F, Z. Naturforsch. A, 1972, 27, 100. [all data]

Bonczyk and Hughes, 1967
Bonczyk, P.A.; Hughes, V.W., Hyperfine structure of the v=O, J=l state in Rb85F, Rb87F, K39F, and K41F by the molecular-beam electric-resonance method, Phys. Rev., 1967, 161, 15. [all data]

Van Wachem, De Leeuw, et al., 1967
Van Wachem, R.; De Leeuw, F.H.; Dymanus, A., Dipole moments of KF and KBr measured by the molecular-beam electric-resonance method, J. Chem. Phys., 1967, 47, 2256. [all data]

Mehran, Brooks, et al., 1966
Mehran, F.; Brooks, R.A.; Ramsey, N.F., Rotational magnetic moments of alkali-halide molecules, Phys. Rev., 1966, 141, 93. [all data]

Graff and Runolfsson, 1963
Graff, G.; Runolfsson, O., Gleichzeitige Messung von Hyperfeinstruktur, Stark-Effekt und Zeeman-Effekt des 39K19F mit einer Molekulstrahlresonanzapparatur, Z. Phys., 1963, 176, 90. [all data]

Schlier, 1957
Schlier, C., Messung der Hyperfeinstruktur des Kaliumfluorids mit der Molekulstrahlresonanzmethode, Z. Phys., 1957, 147, 600. [all data]

Brewer and Brackett, 1961
Brewer, L.; Brackett, E., The dissociation energies of gaseous alkali halides, Chem. Rev., 1961, 61, 425. [all data]

Bulewicz, Phillips, et al., 1961
Bulewicz, E.M.; Phillips, L.F.; Sugden, T.M., Determination of dissociation constants and heats of formation of simple molecules by flame photometry. Part 8. Stabilities of the gaseous diatomic halides of certain metals, Trans. Faraday Soc., 1961, 57, 921. [all data]

Ismail, Hauge, et al., 1973
Ismail, Z.K.; Hauge, R.H.; Margrave, J.L., Infrared spectra of sodium and potassium fluorides by matrix isolation, J. Inorg. Nucl. Chem., 1973, 35, 3201. [all data]


Notes

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