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

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

Chemical Engineering and Materials Science

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Abstract

The elastic constants and acoustic velocities of MgSiO_s 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 language	English (US)
Article number	018501
Pages (from-to)	185011-185014
Number of pages	4
Journal	Physical Review Letters
Volume	92
Issue number	1
State	Published - Jan 9 2004

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

abstract = "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.",

author = "Wentzcovitch, {R. M.} and Karki, {B. B.} and M. Cococcioni and {De Gironcoli}, S.",

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AU - Wentzcovitch, R. M.

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AU - Cococcioni, M.

AU - De Gironcoli, S.

PY - 2004/1/9

Y1 - 2004/1/9

N2 - 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.

AB - 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.

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

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