Lithium fluoride
- Formula: FLi
- Molecular weight: 25.939
- IUPAC Standard InChI: InChI=1S/FH.Li/h1H;/q;+1/p-1
- IUPAC Standard InChIKey: PQXKHYXIUOZZFA-UHFFFAOYSA-M
- CAS Registry Number: 7789-24-4
- Chemical structure:
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Gas phase thermochemistry data
Go To: Top, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, References, Notes
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 |
|---|---|---|---|---|---|
| ΔfH°gas | -81.451 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1968 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°gas,1 bar | 47.851 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1968 |
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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 3000. to 6000. |
|---|---|
| A | 8.386310 |
| B | 0.599110 |
| C | -0.123634 |
| D | 0.010457 |
| E | -0.102129 |
| F | -84.31831 |
| G | 57.25229 |
| H | -81.45010 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1968 |
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 |
|---|---|---|---|---|---|
| ΔfH°liquid | -143.08 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1968 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 10.27 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1968 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -147.45 | kcal/mol | Review | Chase, 1998 | Data last reviewed in December, 1968 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 8.540 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in December, 1968 |
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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 1121.3 to 3000. |
|---|---|
| A | 15.34010 |
| B | 1.002730×10-11 |
| C | -5.502560×10-12 |
| D | 9.379162×10-13 |
| E | 2.749131×10-13 |
| F | -147.6550 |
| G | 28.83210 |
| H | -143.0810 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1968 |
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 (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.
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| Temperature (K) | 298. to 1121.3 |
|---|---|
| A | 9.980490 |
| B | 4.472061 |
| C | 0.165792 |
| D | -0.237242 |
| E | -0.116409 |
| F | -151.0120 |
| G | 18.62350 |
| H | -147.4500 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in December, 1968 |
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: William E. Acree, Jr., James S. Chickos
Enthalpy of sublimation
| ΔsubH (kcal/mol) | Temperature (K) | Reference | Comment |
|---|---|---|---|
| 64.1 ± 1.0 | 1073. to 1121. | Scheffee and Margrave, 1959 | See also Eisenstadt, Rothberg, et al., 1958. |
| 64.0 ± 1.0 | 957. to 1113. | Porter and Schoonmaker, 1958 |
Gas phase ion energetics data
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, References, Notes
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:
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
LL - Sharon G. Lias and Joel F. Liebman
B - John E. Bartmess
View reactions leading to FLi+ (ion structure unspecified)
Electron affinity determinations
| EA (eV) | Method | Reference | Comment |
|---|---|---|---|
| >1.34997 | EIAE | Ebinghaus, 1964 | From (LiF)2; G3MP2B3 calculations indicate an EA of ca.0.5 eV; B |
Ionization energy determinations
| IE (eV) | Method | Reference | Comment |
|---|---|---|---|
| 11.3 | EI | Berkowitz, Tasman, et al., 1962 | RDSH |
Appearance energy determinations
| Ion | AE (eV) | Other Products | Method | Reference | Comment |
|---|---|---|---|---|---|
| Li+ | 11.40 | F | EI | Veljkovic, Neskovic, et al., 1993 | LL |
| Li+ | 11.5 | F | EI | Berkowitz, Tasman, et al., 1962 | RDSH |
| Li+ | ~12. | F | EI | Porter and Schoonmaker, 1958 | RDSH |
References
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change 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]
Scheffee and Margrave, 1959
Scheffee, R.S.; Margrave, J.L.,
Vapor Pressure Equations for Species over Solid and Liquid LiF,
J. Chem. Phys., 1959, 31, 6, 1682, https://doi.org/10.1063/1.1730680
. [all data]
Eisenstadt, Rothberg, et al., 1958
Eisenstadt, M.; Rothberg, G.M.; Kusch, P.,
Molecular Composition of Alkali Fluoride Vapors,
J. Chem. Phys., 1958, 29, 4, 797, https://doi.org/10.1063/1.1744593
. [all data]
Porter and Schoonmaker, 1958
Porter, R.F.; Schoonmaker, R.C.,
Mass spectrometric study of the vaporization of LiF, NaF, and LiF-NaF mixtures,
J. Chem. Phys., 1958, 29, 1070. [all data]
Ebinghaus, 1964
Ebinghaus, H.Z.,
Negative Ionen aus Alkalihalogeniden und Electronenaffinitaten der Alkalimetalle und Alkalihalogenide,
Z. Naturfor., 1964, 19A, 727. [all data]
Berkowitz, Tasman, et al., 1962
Berkowitz, J.; Tasman, H.A.; Chupka, W.A.,
Double-oven experiments with lithium halide vapors,
J. Chem. Phys., 1962, 36, 2170. [all data]
Veljkovic, Neskovic, et al., 1993
Veljkovic, M.V.; Neskovic, O.M.; Miletic, M.B.; Zmbov, K.F.,
Mass spectrometric study of ionization and fragmentation of lithium fluoride vapor by electron impact,
J. Serb. Chem. Soc., 1993, 58, 101. [all data]
Notes
Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, References
- Symbols used in this document:
AE Appearance energy EA Electron affinity S°gas,1 bar Entropy of gas at standard conditions (1 bar) S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) S°solid Entropy of solid at standard conditions ΔfH°gas Enthalpy of formation of gas at standard conditions ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔsubH Enthalpy of sublimation - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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