Growth of large (1 mm) MgSiO3 perovskite single crystals: A thermal gradient method at ultrahigh pressure

Anton Shatskiy, Hiroshi Fukui, Takuya Matsuzaki, Keiji Shinoda, Akira Yoneda, Daisuke Yamazaki, Eiji Ito, Tomoo Katsura

研究成果: Article査読

30 被引用数 (Scopus)

抄録

Large single crystals of MgSiO3 perovskite were successfully synthesized by a thermal gradient method at 24 GPa and 1500 °C. This was achieved by an improvement of high-pressure synthesis technique that allowed us to grow single crystals under such ultrahigh-pressure conditions in relatively large volumes (e.g., 10 mm3). Since crystal growth is hindered by neighboring crystals, the nucleation density was suppressed by reducing the thermal gradient to 20 °C/mm, permitting an increase in free space for large crystal growth. KHCO3-Mg(OH)2 solvent can be used to grow perovskite crystals. However, the carbonate solvent produces melt inclusions. Silicate sources with MgSiO3 composition produce stishovite inclusions, which in turn cause splitting of perovskite crystals. The formation of these inclusions is avoided by using H2O as a solvent and 85MgSiO3-15Mg2SiO4 as a silicate source. The H2O also allows homogeneous crystal growth, probably because of its low viscosity and high silicate solubility. High-quality single crystals larger than 1 mm were successfully synthesized through these technical developments.

本文言語English
ページ(範囲)1744-1749
ページ数6
ジャーナルAmerican Mineralogist
92
10
DOI
出版ステータスPublished - 2007 10月

ASJC Scopus subject areas

  • 地球物理学
  • 地球化学および岩石学

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