Magnesium fluoride
- Formula: F2Mg
- Molecular weight: 62.3018
- IUPAC Standard InChI: InChI=1S/2FH.Mg/h2*1H;/q;;+2/p-2
- IUPAC Standard InChIKey: ORUIBWPALBXDOA-UHFFFAOYSA-L
- CAS Registry Number: 7783-40-6
- Chemical structure:
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Condensed phase thermochemistry data
Go To: Top, 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.
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔfH°liquid | -256.300 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1975 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°liquid,1 bar | 21.49 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1975 |
| Quantity | Value | Units | Method | Reference | Comment |
| ΔfH°solid | -268.69 ± 0.29 | kcal/mol | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| ΔfH°solid | -268.700 | kcal/mol | Review | Chase, 1998 | Data last reviewed in June, 1975 |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid,1 bar | 13.7 ± 0.1 | cal/mol*K | Review | Cox, Wagman, et al., 1984 | CODATA Review value |
| Quantity | Value | Units | Method | Reference | Comment |
| S°solid | 13.66 | cal/mol*K | Review | Chase, 1998 | Data last reviewed in June, 1975 |
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) | 1536. to 3000. |
|---|---|
| A | 22.68690 |
| B | -1.267321×10-8 |
| C | 5.082560×10-9 |
| D | -6.946270×10-10 |
| E | -3.103500×10-9 |
| F | -266.4491 |
| G | 42.60141 |
| H | -256.2990 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1975 |
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 1536. |
|---|---|
| A | 16.38420 |
| B | 5.431611 |
| C | -2.906831 |
| D | 0.615133 |
| E | -0.272673 |
| F | -274.7239 |
| G | 30.46181 |
| H | -268.7000 |
| Reference | Chase, 1998 |
| Comment | Data last reviewed in June, 1975 |
Phase change data
Go To: Top, Condensed phase thermochemistry 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 by: William E. Acree, Jr., James S. Chickos
| Quantity | Value | Units | Method | Reference | Comment |
|---|---|---|---|---|---|
| ΔsubH° | 83.2 ± 1.0 | kcal/mol | N/A | Greenbaum, Ko, et al., 1964 |
Enthalpy of sublimation
| ΔsubH (kcal/mol) | Temperature (K) | Method | Reference | Comment |
|---|---|---|---|---|
| 78.2 ± 1.0 | 1400. | TE | Greenbaum, Ko, et al., 1964 | Based on data from 1273. to 1513. K. |
| 85.99 | 1330. | MS | Berkowitz and Marquart, 1962 | Based on data from 1220. to 1450. K. |
References
Go To: Top, Condensed phase thermochemistry data, Phase change 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]
Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A.,
CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]
Greenbaum, Ko, et al., 1964
Greenbaum, Michael A.; Ko, Hon Chung; Wong, Madeline; Farber, Milton,
The Vapor Pressure and Heat and Entropy of Sublimation of Solid Magnesium Fluoride,
J. Phys. Chem., 1964, 68, 4, 965-968, https://doi.org/10.1021/j100786a510
. [all data]
Berkowitz and Marquart, 1962
Berkowitz, J.; Marquart, J.R.,
Mass-spectrometric study of the magnesium halides,
J. Chem. Phys., 1962, 37, 1853. [all data]
Notes
Go To: Top, Condensed phase thermochemistry data, Phase change data, References
- Symbols used in this document:
S°liquid,1 bar Entropy of liquid at standard conditions (1 bar) S°solid Entropy of solid at standard conditions S°solid,1 bar Entropy of solid at standard conditions (1 bar) ΔfH°liquid Enthalpy of formation of liquid at standard conditions ΔfH°solid Enthalpy of formation of solid at standard conditions ΔsubH Enthalpy of sublimation ΔsubH° Enthalpy of sublimation at standard conditions - Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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