Thermal diffusivity of periclase at high temperatures and high pressures

Details Thermal diffusivity of periclase at high temperatures and high pressures Thermal diffusivity of periclase at high temperatures and high pressures

Apr 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997pepi..101...73k&link_type=abstract

Physics of the Earth and Planetary Interiors, v. 101, p. 73-77.

Physics

12

Scientific paper

Thermal diffusivity of periclase is measured at pressures up to 5 GPa and at temperatures from 400 to 1500 K using a 6-8 type multi-anvil apparatus by adopting the Ångström method in a cylindrical geometry. The logarithmic volume derivative of the parameter b, which indicates thermal resistance by the anharmonicity of the lattice vibration, is (∂ ln b/∂ ln V) = 9.9. The lattice thermal diffusivity of magnesiowüstite at the top of the lower mantle is estimated to be 5.8 × 10-6 m2 s-1. Thermal conductivity of magnesiowüstite in the lower mantle is mostly attributed to the heat transfer by the propagation of lattice wave.

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