The phase boundary between α- and β-Mg2SiO 4 determined by in situ x-ray observation

H. Morishima, Takumi Kato, M. Suto, E. Ohtani, S. Urakawa, W. Utsumi, O. Shimomura, T. Kikegawa

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Abstract

The stability of Mg2SiO4, a major constituent in the Earth's mantle, has been investigated experimentally by in situ observation with synchrotron radiation. A cubic-type high-pressure apparatus equipped with sintered diamond anvils has been used over pressures of 11 to 15 gigapascals and temperatures of 800° to 1600°C. The phase stability of α-Mg 2SiO4 and β-Mg2SiO4 was determined by taking account of the kinetic behavior of transition. The phase boundary between α-Mg2SiO4 and β-Mg 2SiO4 is approximated by the linear expression P = (9.3 ± 0.1) + (0.0036 ± 0.0002)T, where P is pressure in gigapascals and T is temperature in degrees Celsius.

Original languageEnglish
Pages (from-to)1202-1203
Number of pages2
JournalScience
Volume265
Issue number5176
DOIs
Publication statusPublished - Jan 1 1994

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Phase boundaries
X rays
Diamond
Phase stability
Synchrotron radiation
Earth (planet)
Temperature
Kinetics
forsterite

All Science Journal Classification (ASJC) codes

  • General

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Morishima, H., Kato, T., Suto, M., Ohtani, E., Urakawa, S., Utsumi, W., ... Kikegawa, T. (1994). The phase boundary between α- and β-Mg2SiO 4 determined by in situ x-ray observation. Science, 265(5176), 1202-1203. https://doi.org/10.1126/science.265.5176.1202

The phase boundary between α- and β-Mg2SiO 4 determined by in situ x-ray observation. / Morishima, H.; Kato, Takumi; Suto, M.; Ohtani, E.; Urakawa, S.; Utsumi, W.; Shimomura, O.; Kikegawa, T.

In: Science, Vol. 265, No. 5176, 01.01.1994, p. 1202-1203.

Research output: Contribution to journalArticle

Morishima, H, Kato, T, Suto, M, Ohtani, E, Urakawa, S, Utsumi, W, Shimomura, O & Kikegawa, T 1994, 'The phase boundary between α- and β-Mg2SiO 4 determined by in situ x-ray observation', Science, vol. 265, no. 5176, pp. 1202-1203. https://doi.org/10.1126/science.265.5176.1202
Morishima H, Kato T, Suto M, Ohtani E, Urakawa S, Utsumi W et al. The phase boundary between α- and β-Mg2SiO 4 determined by in situ x-ray observation. Science. 1994 Jan 1;265(5176):1202-1203. https://doi.org/10.1126/science.265.5176.1202
Morishima, H. ; Kato, Takumi ; Suto, M. ; Ohtani, E. ; Urakawa, S. ; Utsumi, W. ; Shimomura, O. ; Kikegawa, T. / The phase boundary between α- and β-Mg2SiO 4 determined by in situ x-ray observation. In: Science. 1994 ; Vol. 265, No. 5176. pp. 1202-1203.
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