An in situ X ray diffraction study of the α-β transformation kinetics of Mg2SiO4

Tomoaki Kubo, Eiji Ohtani, Takumi Kato, Hideaki Morishima, Daisuke Yamazaki, Akio Suzuki, Kenji Mibe, Takumi Kikegawa, Osamu Shimomura

Research output: Contribution to journalArticle

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Abstract

This is the first report of the direct measurement of α-β transformation kinetics in Mg2SiO4, a major constituent in the Earth's mantle, through in situ X ray diffraction experiments at high pressure. The experiments were conducted using the sintered diamond cubic-anvil apparatus with synchrotron radiation (MAX 80). Although the present work is still preliminary, the kinetic data were analyzed using a nucleation and growth model. The growth rate of β-phase is determined to be 3.3 (1.6∼4.9) × 10-10 m/s at 13.0 GPa and 900°C, 7.1 (3.4∼10) × 10-10 m/s at 14.1 GPa and 885°C, and 1.5 (0.7∼2.3) × 10-9 m/s at 14.9 GPa and 875°C.

Original languageEnglish
Pages (from-to)695-698
Number of pages4
JournalGeophysical Research Letters
Volume25
Issue number5
Publication statusPublished - Mar 1 1998
Externally publishedYes

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X-ray diffraction
kinetics
anvils
diffraction
diamond
nucleation
synchrotron radiation
Earth mantle
x rays
experiment
diamonds
mantle
in situ
radiation

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)

Cite this

Kubo, T., Ohtani, E., Kato, T., Morishima, H., Yamazaki, D., Suzuki, A., ... Shimomura, O. (1998). An in situ X ray diffraction study of the α-β transformation kinetics of Mg2SiO4. Geophysical Research Letters, 25(5), 695-698.

An in situ X ray diffraction study of the α-β transformation kinetics of Mg2SiO4. / Kubo, Tomoaki; Ohtani, Eiji; Kato, Takumi; Morishima, Hideaki; Yamazaki, Daisuke; Suzuki, Akio; Mibe, Kenji; Kikegawa, Takumi; Shimomura, Osamu.

In: Geophysical Research Letters, Vol. 25, No. 5, 01.03.1998, p. 695-698.

Research output: Contribution to journalArticle

Kubo, T, Ohtani, E, Kato, T, Morishima, H, Yamazaki, D, Suzuki, A, Mibe, K, Kikegawa, T & Shimomura, O 1998, 'An in situ X ray diffraction study of the α-β transformation kinetics of Mg2SiO4', Geophysical Research Letters, vol. 25, no. 5, pp. 695-698.
Kubo T, Ohtani E, Kato T, Morishima H, Yamazaki D, Suzuki A et al. An in situ X ray diffraction study of the α-β transformation kinetics of Mg2SiO4. Geophysical Research Letters. 1998 Mar 1;25(5):695-698.
Kubo, Tomoaki ; Ohtani, Eiji ; Kato, Takumi ; Morishima, Hideaki ; Yamazaki, Daisuke ; Suzuki, Akio ; Mibe, Kenji ; Kikegawa, Takumi ; Shimomura, Osamu. / An in situ X ray diffraction study of the α-β transformation kinetics of Mg2SiO4. In: Geophysical Research Letters. 1998 ; Vol. 25, No. 5. pp. 695-698.
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