Thermal expansivity of MgSiO3 perovskite under high pressures up to 20 GPa
Thermal expansivity of MgSiO3 perovskite under high pressures up to 20 GPa
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DOI：
10.1029/95gl00584
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发表时间：
1995-05
影响因子：
5.2
通讯作者：
W. Utsumi;Nobumasa Funamori;T. Yagi;E. Ito;T. Kikegawa;O. Shimomura
中科院分区：
文献类型：
--
作者：
W. Utsumi;Nobumasa Funamori;T. Yagi;E. Ito;T. Kikegawa;O. Shimomura
Volume measurement of MgSiO3 perovskite was made in the temperature range from 25 to 500°C as a function of pressure up to 20 GPa by in situ x-ray diffraction, using a DIA apparatus combined with synchrotron radiation. The measured thermal expansivity ranges from 1.8 to 2.5*10−5 /K and decreases only slightly with pressure. Our present results are in good agreement with the previous lower pressure (up to 11 GPa) data of Wang et al. [1994] and the higher pressure (36 GPa) data of Funamori and Yagi [1993], but contrast with the results using diamond anvil cell by Mao et al. [1991], particularly in a low pressure range.
