X-ray study of SnO2 under high pressure and temperature generated with sintered diamond anvils |
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| Authors: | S. Endo S. Nitawaki T. Shige Y. Akahama T. Kikegawa O. Shimomura |
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| Affiliation: | 1. Research Center for Extreme Materials, Osaka University Toyonaka , Osaka, 560, Japan;2. Basic Research Laboratory , Himeji Institute of Technology Himeji , 671, Japan;3. National Laboratory for High Energy Physics Tsukuba , 305, Japan;4. National Institute for Research in Inorganic Materials Tsukuba , 305, Japan |
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| Abstract: | Abstract In-situ X-ray diffraction technique using synchrotron radiation was applied for polymorphic transitions in SnO2 under high pressure and temperature generated with 6–8 type double-stage multianvils made of sintered diamond. At 23.6 GPa, the mixed phases of rutile-type structure (R-SnO2) and columbite-type (c-SnO2) were heated: at 700°C peaks of fluorite-type structure (F-SnO2) began to appear, and at 1000°C, C-SnO2 and 5m later R-SnO2 disappeared completely and a single phase of F-SnO2 was recognized, indicating a direct transition from R-SnO2 to F-SnO2. The volume reduction of 5.3% was obtained for C-SnO2→F-SnO2 transition. |
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| Keywords: | Polymorphic transition SnO2 X-ray diffraction sintered diamond anvil high pressure high temperature |
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