H₂O-CO₂混合流体中で合成されたザクロ石の結晶形態

• 正路 徹也

  Department of Geosystem Engineering, The University of Tokyo

• 鞠子 正

  School of Education, Waseda University

• 高橋 祐道

  School of Education, Waseda University (presently Fujitsu Ltd.)

• 金田 博彰

  Department of Geosystem Engineering, The University of Tokyo

書誌事項

タイトル別名

• Morphology of grandite garnet synthesized in H2O-CO2 mixtures: an experimental note.
• Morphology of grandite garnet synthesiz

抄録

Relatively large crystals of grandite garnet have been obtained by hydrothermally treating reagent mixtures of CaCO₃, Al₂O₃, Fe₂O₃ and SiO₂ at 500, 600 and 700°C. The crystals show two types of forms: i) only dodecahedron, and ii) dodecahedron with trapezohedral faces. The first form appears in grossular and iron-poor garnet (<20 mole % in andradite molecule), while the second form tends to appear in the case that iron is rich (>40 mole %). This fact suggests that the morphology of grandite garnet largely depend on the iron/aluminum ratio in the system. The garnets synthesized in another series of runs, however, show only dodecahedron independently of their compositions. Accordingly, CO₂ pressure, pH and so on as well as composition and temperature seem to be also important for determining the morphology.

収録刊行物

• 岩鉱

  岩鉱 93 (2), 64-68, 1998

  一般社団法人　日本鉱物科学会

キーワード

• Garnet
• Morphology
• Hydrothermal synthesis
• Carbon dioxide

詳細情報

• CRID: 1390001206234628992
• NII論文ID: 10002089876
• NII書誌ID: AN10047992
• DOI: 10.2465/ganko.93.64
• COI: 1:CAS:528:DyaK1cXit12htrs%3D
• ISSN: 18813275
• ISSN: 09149783
• NDL書誌ID: 4446248
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I4446248
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可