Skip to Main Content
Skip Nav Destination
GEOREF RECORD

Formation of SiH (sub 4) and H (sub 2) O by the dissolution of quartz in H (sub 2) fluid under high pressure and temperature

Ayako Shinozaki, Hiroyuki Kagi, Naoki Noguchi, Hisako Hirai, Hiroaki Ohfuji, Taku Okada, Satoshi Nakano and Takehiko Yagi
Formation of SiH (sub 4) and H (sub 2) O by the dissolution of quartz in H (sub 2) fluid under high pressure and temperature
American Mineralogist (July 2014) 99 (7): 1265-1269

Abstract

Species dissolved in H (sub 2) fluid were investigated in a SiO (sub 2) -H (sub 2) system. Raman and infrared (IR) spectra were measured at high pressure and room temperature after heating experiments were conducted at two pressure and temperature conditions: 2.0 GPa, 1700 K and 3.0 GPa, 1500 K. With the dissolution of quartz, a SiH vibration mode assignable to SiH (sub 4) was detected from Raman spectra of the fluid phase. Furthermore, an OH vibration mode was observed at 3260 cm (super -1) from the IR spectra at 3.0 GPa. With decreasing pressure, the OH vibration frequencies observed between 3.0 and 2.1 GPa correspond to that of ice VII, and those observed at 1.4 and 1.1 GPa correspond to that of ice VI. These results indicate that the chemical reaction between dissolved SiO (sub 2) components and H (sub 2) fluid caused the formation of H (sub 2) O and SiH (sub 4) , which was contrastive to that observed in SiO (sub 2) -H (sub 2) O fluid. Results imply that a part of H (sub 2) is oxidized to form H (sub 2) O when SiO (sub 2) components of mantle minerals dissolve in H (sub 2) fluid, even in an iron-free system.


ISSN: 0003-004X
EISSN: 1945-3027
Coden: AMMIAY
Serial Title: American Mineralogist
Serial Volume: 99
Serial Issue: 7
Title: Formation of SiH (sub 4) and H (sub 2) O by the dissolution of quartz in H (sub 2) fluid under high pressure and temperature
Affiliation: University of Tokyo, Geochemical Research Center, Tokyo, Japan
Pages: 1265-1269
Published: 201407
Text Language: English
Publisher: Mineralogical Society of America, Washington, DC, United States
References: 46
Accession Number: 2014-058162
Categories: Geophysics of minerals and rocks
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
Secondary Affiliation: Ehime University, JPN, JapanNational Institute for Materials Science, JPN, Japan
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Mineralogical Society of America. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201431
Close Modal

or Create an Account

Close Modal
Close Modal