A model for the computation of thermal expansivity at high compression and high temperatures - MGO as an example

Details A model for the computation of thermal expansivity at high compression and high temperatures - MGO as an example A model for the computation of thermal expansivity at high compression and high temperatures - MGO as an example

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992georl..19.1987a&link_type=abstract

Geophysical Research Letters (ISSN 0094-8276), vol. 19, no. 19, p. 1987-1990.

Other

36

Earth Mantle, Magnesium Oxides, Physical Properties, Thermal Expansion, Thermodynamic Properties, High Pressure, High Temperature

Scientific paper

The value of the thermal expansivity, alpha, over a wide range of compression, eta, and temperature is computed. Values of alpha for MgO over V,P,T conditions including those of the earth's lower mantle are suggested using a simple equation relating alpha to eta along isochores. The ab initio database is used to evaluate the parameters in the equation. The thermal expansivity is found to vary from about 1.40 alpha(a) to 0.40 alpha(a) along a geotherm through the upper and lower mantle, where alpha(a) is alpha at ambient conditions.

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