Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences
2018 Annual Meeting of Japan Association of Mineralogical Sciences
Session ID : S2-P02
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S2: Water Rock Interaction
Kinetic study of phase transition of amorphous silica under sub- and supercritical conditons.
*Takamasa NiibeAtsushi OkamotoAmagai TakashiTsuchiya Noriyoshi
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CONFERENCE PROCEEDINGS FREE ACCESS

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Abstract

Solubility of quartz changes greatly depending on temperature and pressure. Hydrothermal experiments for understanding silica precipitation and dissolution including phase transition were carried out under sub- and supercritical conditions. In the result, amorphous silica changed to cristobalite within 5 days on 350℃ and 400℃, and the Si concentration roughly agreed with the solubility of amorphous silica at the day 11 and 15 in the experiment at 400°C.

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© 2018 Japan Association of Mineralogical Sciences
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