二重構造を持つカンラン石単結晶の合成と拡散計数の測定

• 長沢 宏

  学習院大学理学部

• 森岡 正名

  東京大学アイソトープ総合センター

書誌事項

タイトル別名

• Synthesis and diffusion measurement of double-layered single crystals of olivine
• 二重構造を持つカンラン石単結晶の合成と拡散係数の測定
• 2ジュウ コウゾウ オ モツ カンランセキ タンケッショウ ノ ゴウセイ ト

抄録

Double-layered single crystals of olivine, (Mg, Ni)₂SiO₄-and (Mg, Co)₂SiO₄-Mg₂SiO₄, were synthesized for the purpose of measuring cation inter-diffusivities in olivine. The olivine solid solution layers were epitaxially overgrown on the surface of forsterite seed crystals in Li₂O-MoO₃-V₂O₅ flux systems at temperatures below, 1,000℃. Diffusion annealing was performed at 1,050〜1,450℃ for 5 hours to 81 days. Diffusion coefficients observed showed relations D=D₀exp (-E_D/kT), where D₀ for Co-Mg and Ni-Mg are 68.6 and 15.1 cm²/sec, respectively and E_D for both Co-Mg and Ni-Mg are 407 kJ/mol. The observed D's are nearly an order of magnitude lower than those previously observed by Morioka (1980;1981), although E_D's agree with the previous values. The observed discrepanceies in D's were discussed in terms of diffusion mechanism.

収録刊行物

• 地球化学

  地球化学 30 (1), 17-25, 1996

  一般社団法人日本地球化学会

キーワード

• inter-diffusion
• olivine
• epitaxial overgrowth

詳細情報

• CRID: 1390001205742451840
• NII論文ID: 110008679909
• NII論文ID: 10007186589
• NII書誌ID: AN00141280
• DOI: 10.14934/chikyukagaku.30.17
• ISSN: 21885923
• ISSN: 03864073
• NDL書誌ID: 3946323
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I3946323
• 本文言語コード: ja
• データソース種別:
  • JaLC
  • NDL
  • CiNii Articles
• 抄録ライセンスフラグ: 使用不可