Thermoelastic Properties of MgSiO3-Perovskite: Insights on the Nature of the Earth's Lower Mantle

R. M. Wentzcovitch, B. B. Karki, M. Cococcioni, S. De Gironcoli

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The elastic constants and acoustic velocities of MgSiOs perovskite, the most abundant mineral of the earth's lower mantle (LM), were discussed. Earth model indicated that the top of the LM behaved as typical aggregate of pyrolitic composition. The elastic constants were used to predict acoustic velocity of LM mineral aggregates. Results show that the values of the predicted properties were independent of the order used in the finite strain expansion of the free energy.

Original languageEnglish (US)
Article number018501
Pages (from-to)185011-185014
Number of pages4
JournalPhysical Review Letters
Issue number1
StatePublished - Jan 9 2004


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