書誌事項
- 公開日
- 2003-07-09
- 権利情報
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- http://link.aps.org/licenses/aps-default-license
- DOI
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- 10.1103/physrevb.68.014103
- 公開者
- American Physical Society (APS)
この論文をさがす
説明
Structural phase transitions of germanium dioxide $({\mathrm{GeO}}_{2})$ have been investigated at pressures up to 120 GPa, which was heated to a temperature above 2000 K, using a laser-heated diamond anvil cell technique. A phase transition between ${\mathrm{CaCl}}_{2}$-type and $\ensuremath{\alpha}\ensuremath{-}{\mathrm{PbO}}_{2}$-type phases was observed at about 50 GPa. At pressures higher than 90 GPa, we also observed the occurrence of a new high-pressure phase of pyrite-type (modified-fluorite type) structure $(Pa3\ifmmode\bar\else\textasciimacron\fi{})$ that is denser than other known ${\mathrm{GeO}}_{2}$ phases. Our results were consistent with the high-pressure transition sequence of tin dioxide $({\mathrm{SnO}}_{2})$ as analog of ${\mathrm{GeO}}_{2}.$ The new structure of the ${\mathrm{GeO}}_{2}$ high-pressure phase may be that of high-pressure silica $({\mathrm{SiO}}_{2})$ phase predicted by the theoretical investigations.
収録刊行物
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- Physical Review B
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Physical Review B 68 (1), 014103-, 2003-07-09
American Physical Society (APS)
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詳細情報 詳細情報について
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- CRID
- 1362544420566656768
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- ISSN
- 10953795
- 01631829
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- データソース種別
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- Crossref
- OpenAIRE