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Calculated elastic and thermal properties of MgO at high pressures and temperatures

Publication ,  Journal Article
Isaak, DG; Cohen, RE; Mehl, MJ
Published in: Journal of Geophysical Research
January 1, 1990

The pressure and temperature dependence of the thermoelastic properties of MgO were calculated using the potential-induced breathing model. These calculations represent the first attempt to obtain a consistent set of thermodynamic elastic moduli for an oxide from an ab initio model over a wide range of pressure and temperature. By assuming the quasi-harmonic approximation for the free energies, excellent agreement is found between the temperature dependence of calculated elastic moduli and those obtained from experiments. Comparison of the calculated athermal and isothermal elastic moduli shows approximations using athermal values to be unreliable at high temperature. The elastic moduli for MgO are presented for pressures and temperatures appropriate for the lower mantle, a regime in which elastic moduli cannot be obtained by direct measurement. -Authors

Duke Scholars

Published In

Journal of Geophysical Research

DOI

ISSN

0148-0227

Publication Date

January 1, 1990

Volume

95

Issue

B5

Start / End Page

7055 / 7067

Related Subject Headings

  • Meteorology & Atmospheric Sciences
 

Citation

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Isaak, D. G., Cohen, R. E., & Mehl, M. J. (1990). Calculated elastic and thermal properties of MgO at high pressures and temperatures. Journal of Geophysical Research, 95(B5), 7055–7067. https://doi.org/10.1029/JB095iB05p07055
Isaak, D. G., R. E. Cohen, and M. J. Mehl. “Calculated elastic and thermal properties of MgO at high pressures and temperatures.” Journal of Geophysical Research 95, no. B5 (January 1, 1990): 7055–67. https://doi.org/10.1029/JB095iB05p07055.
Isaak DG, Cohen RE, Mehl MJ. Calculated elastic and thermal properties of MgO at high pressures and temperatures. Journal of Geophysical Research. 1990 Jan 1;95(B5):7055–67.
Isaak, D. G., et al. “Calculated elastic and thermal properties of MgO at high pressures and temperatures.” Journal of Geophysical Research, vol. 95, no. B5, Jan. 1990, pp. 7055–67. Scopus, doi:10.1029/JB095iB05p07055.
Isaak DG, Cohen RE, Mehl MJ. Calculated elastic and thermal properties of MgO at high pressures and temperatures. Journal of Geophysical Research. 1990 Jan 1;95(B5):7055–7067.

Published In

Journal of Geophysical Research

DOI

ISSN

0148-0227

Publication Date

January 1, 1990

Volume

95

Issue

B5

Start / End Page

7055 / 7067

Related Subject Headings

  • Meteorology & Atmospheric Sciences