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

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

Research output: Contribution to journalArticle

203 Citations (Scopus)

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

ASJC Scopus subject areas

  • General

Fingerprint Dive into the research topics of 'The phase boundary between α- and β-Mg<sub>2</sub>SiO <sub>4</sub> determined by in situ x-ray observation'. Together they form a unique fingerprint.

  • Cite this

    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, 265(5176), 1202-1203. https://doi.org/10.1126/science.265.5176.1202