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Thermoelastic Properties of (Mg,Fe)SiO3 Perovskite

Published online by Cambridge University Press:  01 February 2011

Boris Kiefer  and
Lars Stixrude
Boris Kiefer
Affiliation:
Department of Geological Sciences, University of Michigan, Ann Arbor, MI, 48104-1063, U.S.A
Lars Stixrude
Affiliation:
Department of Geological Sciences, University of Michigan, Ann Arbor, MI, 48104-1063, U.S.A
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Abstract

Magnesium rich (Mg1-x,Fex perovskite is thought to be the most abundant mineral in the earth's lower mantle between 660 km and 2900 km depth. We discuss (mg,Fe) solid solutions and their elastic properties at lower mantle pressures. The diffrences of the elastic constants between the Mg-endmember and the iron bearing perovskite with x=0.25 are used to predict the compositional contribution to lateral variations of elastic wave-velocities at high pressures. These predictions are compared and discussed in the context of seismic observations.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 718: Symposium D – Perovskite Materials , 2002 , D6.1
Copyright
Copyright © Materials Research Society 2002

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