Thermal expansivity of MgSiO 3  perovskite under high pressures up to 20 GPa | Zendy

Utsumi Wataru | Zendy; Funamori Nobumasa | Zendy; Yagi Takehiko | Zendy; Ito Eiji | Zendy; Kikegawa Takumi | Zendy; Shimomura Osamu | Zendy

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Thermal expansivity of MgSiO 3 perovskite under high pressures up to 20 GPa

Author(s) -

Utsumi Wataru,

Funamori Nobumasa,

Yagi Takehiko,

Ito Eiji,

Kikegawa Takumi,

Shimomura Osamu

Publication year - 1995

Publication title -

geophysical research letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.007

H-Index - 273

eISSN - 1944-8007

pISSN - 0094-8276

DOI - 10.1029/95gl00584

Subject(s) - diamond anvil cell , synchrotron radiation , volume (thermodynamics) , perovskite (structure) , mineralogy , geology , diffraction , materials science , thermal expansion , synchrotron , thermodynamics , high pressure , analytical chemistry (journal) , crystallography , chemistry , optics , physics , composite material , chromatography

Volume measurement of MgSiO 3 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.

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