New Polymorph of SiO2 Formed under Quasi-Hydrostatic Compression of Cristobalite.
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- Yamakata Masaaki
- Present address; Japan Atomic Energy Research Institute
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- Yagi Takehiko
- Institute for Solid State Physics, University of Tokyo
Bibliographic Information
- Other Title
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- New Polymorph of Si02 Formed under Quasi-Hydrostatic Compression of Cristobalite
- New Polymorph of Si02 Formed under Quas
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Abstract
High pressure in situ x-ray observations of silica (cristobalite) clarified very large effect of non-hydrostaticity on the crystal structure of high pressure polymorph and the apparent compressibility. Under quasi-hydrostatic compression, cristobalite transformed to a new polymorph, which gives very similar diffraction profile to that of stishovite, while under strongly non-hydrostatic compression, a completely different phase named "X-I" was formed. Very different compression curves of cristobalite were observed, depending on the hydrostaticity of applied pressure, which is well explained using the elastic theory.
Journal
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- The Review of High Pressure Science and Technology
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The Review of High Pressure Science and Technology 7 107-109, 1998
The Japan Society of High Pressure Science and Technology
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Details
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- CRID
- 1390001204381517440
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- NII Article ID
- 10002688963
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- NII Book ID
- AN10452913
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- ISSN
- 13481940
- 0917639X
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- NDL BIB ID
- 4493849
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed