In situ determination of the phase boundary between wadsleyite and ringwoodite in Mg2SiO4

Akio Suzuki, Eiji Ohtani, Hideaki Morishima, Tomoaki Kubo, Yuichi Kanbe, Tadashi Kondo, Taku Okada, Hidenori Terasaki, Takumi Kato, Takumi Kikegawa

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115 Citations (Scopus)

Abstract

The phase boundary between wadsleyite and ringwoodite in Mg2SiO4 composition was determined by in situ observation using synchrotron X-ray and multi anvil apparatus in KEK, Tsukuba, Japan. An energy dispersive method was employed using the Ge solid state detector and the white X-ray beam from the synchrotron radiation source. The pressure was determined by the equation of state of NaCl. The stability field was identified by the change in intensities of diffraction lines of each phases. As a result, the phase boundary is expressed as a linear equation P=10.32(28)+0.00691(9)xT, where P is pressure in gigapascals and T is temperature in degrees Celsius.

Original languageEnglish
Pages (from-to)803-806
Number of pages4
JournalGeophysical Research Letters
Volume27
Issue number6
DOIs
Publication statusPublished - 2000 Mar 15

ASJC Scopus subject areas

  • Geophysics
  • Earth and Planetary Sciences(all)

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