In Situ X Ray Observation of the Phase Transitions from α to γ and from γ to Perovskite+Periclase in Mg2SiO4

T. Kato, T. Kubo, H. Morishima, E. Ohtani, A. Suzuki, D. Yamazaki, K. Mibe, T. Kikegawa, O. Shimomura

研究成果: Article査読

5 被引用数 (Scopus)

抄録

In situ X-ray observation has been made on MgsSiO4 forsterite in the pressure ranges over 250–30 GPa and 1250°C, using double stage multianvil system with sintered diamond anvil window and intense X-rays from synchrotm radiation. Forsterite (α-phase) transfomed into spinel (γ-phase) at 28 GPa and 800αC in the frist heating cycles of the two runs. Spinel transformed into the assemblage of perovskite and periclase in the second heating cycless at 26.4 GPa and 1200°C and at 28.5 GPa and 950°C. The results show that α-γ transition can proceed outside the stability field of spinel, and that the blocking temperature, above which the stable assmblage of perovskite and periclase can be formed, has a pressure dependence.

本文言語English
ページ(範囲)119-121
ページ数3
ジャーナルReview of High Pressure Science and Technology/Koatsuryoku No Kagaku To Gijutsu
7
DOI
出版ステータスPublished - 1998

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学

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