A thermodynamic method for computing thermal expansivity, α, versus T along isobars for silicate perovskite

Details A thermodynamic method for computing thermal expansivity, α, versus T along isobars for silicate perovskite A thermodynamic method for computing thermal expansivity, α, versus T along isobars for silicate perovskite

Sep 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994pepi...85..227a&link_type=abstract

Physics of the Earth and Planetary Interiors, Volume 85, Issue 3-4, p. 227-236.

Physics

28

Scientific paper

The value of α, the volume thermal expansivity, defined as (1/V0)(∂V/∂T)P, enters into many physical properties and thermoelastic identities. The importance of knowing the value of α of candidate materials for the Earth's mantle at P, T conditions of the lower mantle is well recognized. Attempts to find the high-T, high-P values of α for mantle minerals have been made by many researchers. Here we compute α for combinations of P and T and η, T(η = V/V0) found throughout mantle conditions by a thermodynamic method where the high-pressure experimental data used are all contained in the thermoelastic parameters. The thermodynamic parameters are our beginning point. High-temperature experiments are explicitly used as the boundary conditions of differential equations arising from thermodynamic identities.

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