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In situ determination of the phase boundary between Wadsleyite and Ringwoodite in Mg 2 SiO 4
Author(s) -
Suzuki Akio,
Ohtani Eiji,
Morishima Hideaki,
Kubo Tomoaki,
Kanbe Yuichi,
Kondo Tadashi,
Okada Taku,
Terasaki Hidenori,
Kato Takumi,
Kikegawa Takumi
Publication year - 2000
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 - 10.1029/1999gl008425
Subject(s) - ringwoodite , synchrotron radiation , phase boundary , equation of state , diffraction , synchrotron , materials science , analytical chemistry (journal) , in situ , x ray crystallography , mantle (geology) , phase (matter) , mineralogy , optics , physics , thermodynamics , high pressure , chemistry , chromatography , quantum mechanics , geophysics , meteorology
The phase boundary between wadsleyite and ringwoodite in Mg 2 SiO 4 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)×T, where P is pressure in gigapascals and T is temperature in degrees Celsius.