In situ X-ray experiment on the structure of hydrous Mg-silicate melt under high pressure and high temperature

Akihiro Yamada, Toru Inoue, Satoru Urakawa, Ken Ichi Funakoshi, Nobumasa Funamori, Takumi Kikegawa, Hiroaki Ohfuji, Tetsuo Irifune

研究成果: Article査読

26 被引用数 (Scopus)

抄録

Structure of a hydrous silicate melt with a forsterite-enstatite-H2O composition was investigated by in-situ X-ray diffraction with synchrotron radiation. The high temperature hydrous melt was successfully enclosed in a single-crystal diamond capsule under high pressure, up to 6.5 GPa. Results showed that the first sharp diffraction peak (FSDP), which reflects the intermediate-range structure of the complex melt, shifted drastically toward higher Q (scattering vector [Å-1]) at pressure below 2.2 GPa. This observation indicates that the silicate network in the melt was depolymerized by the influence of water molecules and partly replaced by Si-OH units under those high-pressure conditions. In contrast, between 3-5 GPa, such a peak shift was not clearly detected, suggesting that the lengthening of the intermediate-range ordering of ...-Si-O-Si-... linkage (i.e., polymerization of silicate network) occurred.

本文言語English
論文番号L10303
ジャーナルGeophysical Research Letters
34
10
DOI
出版ステータスPublished - 2007 5月 28
外部発表はい

ASJC Scopus subject areas

  • 地球物理学
  • 地球惑星科学(全般)

フィンガープリント

「In situ X-ray experiment on the structure of hydrous Mg-silicate melt under high pressure and high temperature」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル