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Magnesium 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-726.76kJ/molReviewChase, 1998Data last reviewed in June, 1975
Quantity Value Units Method Reference Comment
gas,1 bar256.43J/mol*KReviewChase, 1998Data last reviewed in June, 1975

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 55.71038
B 2.086921
C -0.559681
D 0.047453
E -0.744296
F -745.9528
G 319.0643
H -726.7608
ReferenceChase, 1998
Comment Data last reviewed in June, 1975

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-1072.36kJ/molReviewChase, 1998Data last reviewed in June, 1975
Quantity Value Units Method Reference Comment
liquid,1 bar89.93J/mol*KReviewChase, 1998Data last reviewed in June, 1975
Quantity Value Units Method Reference Comment
Deltafsolid-1124.2 ± 1.2kJ/molReviewCox, Wagman, et al., 1984CODATA Review value
Deltafsolid-1124.24kJ/molReviewChase, 1998Data last reviewed in June, 1975
Quantity Value Units Method Reference Comment
solid,1 bar57.2 ± 0.5J/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
Quantity Value Units Method Reference Comment
solid57.17J/mol*KReviewChase, 1998Data 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 (J/mol*K)
    H° = standard enthalpy (kJ/mol)
    S° = standard entropy (J/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 1536. - 3000.
A 94.92199
B -5.302467×10-8
C 2.126544×10-8
D -2.906320×10-9
E -1.298504×10-8
F -1114.823
G 178.2443
H -1072.355
ReferenceChase, 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 (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. - 1536.
A 68.55149
B 22.72586
C -12.16218
D 2.573717
E -1.140865
F -1149.445
G 127.4522
H -1124.241
ReferenceChase, 1998
Comment Data last reviewed in June, 1975

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

Quantity Value Units Method Reference Comment
Deltasub348.2 ± 4.3kJ/molN/AGreenbaum, Ko, et al., 1964 

Enthalpy of sublimation

DeltasubH (kJ/mol) Temperature (K) Method Reference Comment
327.3 ± 4.31400.TEGreenbaum, Ko, et al., 1964Based on data from 1273. - 1513. K.
359.81330.MSBerkowitz and Marquart, 1962Based on data from 1220. - 1450. K.

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 evaluated as indicated in comments:
L - Sharon G. Lias

Data compiled as indicated in comments:
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Quantity Value Units Method Reference Comment
IE (evaluated)13.6 ± 0.3eVN/AN/AL

Ionization energy determinations

IE (eV) Method Reference Comment
13.3 ± 0.3EIHildenbrand, 1968RDSH
14.0 ± 0.5EIMurad, Hildenbrand, et al., 1966RDSH
13.5 ± 0.4EIBerkowitz and Marquart, 1962RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
MgF+13.5 ± 1.0FEIHildenbrand, 1968RDSH
MgF+13.7 ± 0.4FEIEhlert, Blue, et al., 1964RDSH
MgF+13.5 ± 0.4FEIBerkowitz and Marquart, 1962RDSH

IR Spectrum

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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: Coblentz Society, Inc.

Condensed Phase Spectrum

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IR spectrum
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Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

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Owner COBLENTZ SOCIETY
Collection (C) 2018 copyright by the U.S. Secretary of Commerce
on behalf of the United States of America. All rights reserved.
Origin WYANDOTTE CHEMICALS CORP., WYANDOTTE, MICHIGAN, USA
Source reference COBLENTZ NO. 1428
Date Not specified, most likely prior to 1970
Name(s) difluoromagnesium
State SOLID (MINERAL OIL MULL)
Instrument Not specified, most likely a prism, grating, or hybrid spectrometer.
Path length
SPECTRAL CONTAMINATION DUE TO OIL AROUND 2900, 1450, 1380 CM-1
Resolution 4
Sampling procedure TRANSMISSION
Data processing DIGITIZED BY NIST FROM HARD COPY

This IR spectrum is from the Coblentz Society's evaluated infrared reference spectra collection.


Vibrational and/or electronic energy levels

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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: Marilyn E. Jacox

State:   X


Vib. 
sym. 
 No.   Approximate 
 type of mode 
 cm-1   Med.   Method   References

Piu 2 Bend 254 w m Ne IR Snelson, 1966
2 Bend 243 w m Ar IR Snelson, 1966
2 Bend 238 w m Kr IR Snelson, 1966
Sigmau+ 3 Asym. stretch 862 s Ne IR Snelson, 1966
3 Asym. stretch 840 s Ar IR Snelson, 1966
3 Asym. stretch 834 m Kr IR Snelson, 1966

Additional references: Jacox, 1994, page 84; Buchler, Stauffer, et al., 1964

Notes

wWeak
mMedium
sStrong

References

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, Phase change data, Gas phase ion energetics data, IR Spectrum, Vibrational and/or electronic energy levels, NIST Free Links, 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]

Hildenbrand, 1968
Hildenbrand, D.L., Mass-spectrometric studies of bonding in the group IIA fluorides, J. Chem. Phys., 1968, 48, 3657. [all data]

Murad, Hildenbrand, et al., 1966
Murad, E.; Hildenbrand, D.L.; Main, R.P., Dissociation energies of group IIIA monofluorides-the possibility of potential maxima in their excited H states,, J. Chem. Phys., 1966, 45, 263. [all data]

Ehlert, Blue, et al., 1964
Ehlert, T.C.; Blue, G.D.; Green, J.W.; Margrave, J.L., Mass spectrometric studies at high temperatures. IV. Dissociation energies of the alkaline earth monofluorides, J. Chem. Phys., 1964, 41, 2250. [all data]

Snelson, 1966
Snelson, A., Infrared Spectra of Some Alkaline Earth Halides by the Matrix Isolation Technique, J. Phys. Chem., 1966, 70, 10, 3208, https://doi.org/10.1021/j100882a031 . [all data]

Jacox, 1994
Jacox, M.E., Vibrational and electronic energy levels of polyatomic transient molecules, American Chemical Society, Washington, DC, 1994, 464. [all data]

Buchler, Stauffer, et al., 1964
Buchler, A.; Stauffer, J.L.; Klemperer, W., None, J. Am. Chem. Soc., 1964, 86, 21, 4544, https://doi.org/10.1021/ja01075a007 . [all data]


Notes

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