Abstract
Pyrochlore-type oxide, SnII1.64(Ta 1.88SnIV0.12)O6.58 was oxidized for exploring novel metastable phases. Two novel SnIV 0.82(Ta0.94SnIV0.06)O 4.11 phases with a fluorite-related structure, which was obtained as a pure phase, and with a rutile-related structure appearing as an impurity for the fluorite-related phase were successfully obtained similar to the previous Sn-Nb-O system. The ordered arrangement of respective cations of Sn and (0.94Ta+0.06Sn) in the precursor SnII1.64(Ta 1.88SnIV0.12)O6.58 was left in the both oxidized SnIV0.82(Ta0.94Sn IV0.06)O4.11 phases. In contrast to the previous Sn-Nb-O system, the cation-ordered α-PbO2-related SnIV0.82(Ta0.94SnIV 0.06)O4.11 could not be obtained in the present conditions. Such a difference between the Sn-Ta-O and Sn-Nb-O systems was interpreted by larger energy barrier of the transformation from the fluorite-related phase to α-PbO2-related phase in Sn-Ta-O system than in Sn-Nb-O system.
Original language | English |
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Pages (from-to) | 1254-1261 |
Number of pages | 8 |
Journal | Journal of Solid State Chemistry |
Volume | 178 |
Issue number | 4 |
DOIs | |
Publication status | Published - 2005 Apr |
Externally published | Yes |
Keywords
- Cation-ordered structure
- Fluorite structure
- Metastable phase
- Oxygen intercalation
- Phase transformation
- Pyrochlore structure
- Tantalum oxide
- Tin oxide
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Inorganic Chemistry
- Materials Chemistry