Fe2SiO4-Fe3O4系の高圧相平衡

Phase equilibria for the Fe2SiO4-Fe3O4 system under high pressure

大高 理(Osamu Ohtaka)

大阪大学理学部宇宙地球科学科

藤部 秀樹(Hideki Tobe)

大阪大学基礎工学部

山中 高光(Takamitsu Yamanaka)

大阪大学理学部宇宙地球科学科

受け入れ教官:伊藤 英司


High pressure phase relation of the system Fe2SiO4-Fe3O4 was investigated by synthesis experiments using multi-anvil high pressure apparatus. A complete solid solution with spinel structure along Fe2SiO4-Fe3O4 join occurs above 9 GPa at 1200℃. Lattice constants of the solid solution show almost linear variation with composition. A spinelloid phase is stable for intermediate compositions in the pressure range from 3 to 9 GPa. The synthesized spinelloid phase is successfully indexed assuming nickel aluminosilicate V type structure.


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Institute for Study of the Earth's Interior