Computation for Equation of States of (Mg0.92, Fe0.08)SiO3 Perovskite Based on Mie-Grüneisen-Debye Model-Reference-Cited by-同舟云学术

Computation for Equation of States of (Mg_0.92, Fe_0.08)SiO₃Perovskite Based on Mie-Grüneisen-Debye Model

Published:2014-10 Issue: Volume:1046 Page:76-79
ISSN:1662-8985
Container-title:Advanced Materials Research
language:
Short-container-title:AMR

Author:

Chen Xiu Fang¹

Affiliation:

1. Wuhan Polytechnic University

Abstract

In this paper, the thermal equation of state (EOS) of (Mg0.92, Fe0.08)SiO3is computed by Birch-Murnaghan and Mie-Grüneisen-Debye equations and the related parameters are also analyzed. The value of and has little effect on EOS of (Mg0.92, Fe0.08)SiO3perovskite. The effect of EOS of (Mg0.92, Fe0.08)SiO3perovskite is mainly from the temperature under high pressure. The temperature is higher; the deviation of EOS relative to the PREM model is bigger. The thermal EOS complies with PREM model at T=2000K. The thermal pressure of (Mg0.92, Fe0.08)SiO3perovskite a constant only related to temperature at the lower mantle conditions. At the same time, the EOS of (Mg0.92, Fe0.08)SiO3perovskite is insensitive to the data of and at T=2000K, but when and the thermal EOS is more agreement with PREM model. That is to say, when the value of the and is in the range of 253~273 GPa and 3.69~4.23, (Mg0.92, Fe0.08)SiO3is the perovskite phase, and (Mg0.92, Fe0.08)SiO3perovskite structure remains stable at the mantle conditions.

Publisher

Trans Tech Publications, Ltd.

Subject

General Engineering

Link

https://www.scientific.net/AMR.1046.76.pdf

Reference16 articles.

1. Knittle, E., and R. Teanloz, Synthesis and equation of state of (Mg, Fe)SiO3 Perovskite to over 100GPa, science, 235, 668-670, (1987).

2. Morishima, H., E. ohtani, T. kato, O. shimomura, and T. kikegawa, Thermal expansion of MgSiO3 perovskite at 20. 5 GPa, Geophys, Res, lett. 12, 899-902, (1994).

3. Mao, H. K., R. J. Hemley, Y. Fei, etal, Effect of pressure, temperature, and Composition on lattice Parameters and density of (Mg, Fe)SiO3 perovskites to 30 GPa, J. Geophys. Res., 96, 8069-8079, (1991).

4. Funamori, N., Yagi,T. High pressure and high temperature in situ X-ray observation of MgSiO3 perovskite under lower mantle Conditions, Geophys, Res. lett. 20, 387~390, (1993).

5. Wang, Y., D. J. weidner, R.C. Liebermann, X. Liu, J. Ko, M, T. Vaughan.Y. zhao. A. Yeganeh-Haeri, and R. E. G. Pacalo, Phase transition and thermal expansion of MgSiO3 Perovskite, science, 251; 410-413, (1991).