The Phase Boundary Between α- and β-Mg2SiO4 Determined by in Situ X-ray Observation
作者： H. Morishima , T. Kato , M. Suto , E. Ohtani , S. Urakawa
DOI: 10.1126/SCIENCE.265.5176.1202
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摘要: The stability of Mg2SiO4, a major constituent in the Earth9s mantle, has been investigated experimentally by situ observation with synchrotron radiation. A cubic-type high-pressure apparatus equipped sintered diamond anvils used over pressures 11 to 15 gigapascals and temperatures 800° 1600°C. phase α-Mg2SiO4 β-Mg2SiO4 was determined taking account kinetic behavior transition. boundary between is approximated linear expression P = (9.3 ± 0.1) + (0.0036 0.0002)T where pressure T temperature degrees Celsius.
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