Synthesis of novel cation-ordered compounds with fluorite-related structure prepared by oxidation of Sn-Ta-O pyrochlore

Masao Kita, Takahisa Omata, Shinya Otsuka-Yao-Matsuo, Motomi Katada

研究成果: Article査読

3 被引用数 (Scopus)

抄録

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.

本文言語English
ページ(範囲)1254-1261
ページ数8
ジャーナルJournal of Solid State Chemistry
178
4
DOI
出版ステータスPublished - 2005 4月
外部発表はい

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • 凝縮系物理学
  • 物理化学および理論化学
  • 無機化学
  • 材料化学

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