Neutron diffraction study of the 'doubled perovskite' phases Ba 2M2-xCuxO4+δ (M = In, Sc)

Duncan H. Gregory, Mark T. Weller

研究成果: ジャーナルへの寄稿学術誌査読

8 被引用数 (Scopus)

抄録

Members of the series Ba2M2-xCuxO 4+δ (M = In, x = 0.5, 1; M = Sc, x = 1) have been synthesized by solid-state reaction methods and characterised by powder neutron diffraction. Selected compositions were annealed under oxygen at 1 atm and 160 atm. The evolution of the structure with oxygen stoichiometry δ was studied. The materials form 'doubled perovskite' phases, A2BB′O 6-x crystallising in tetragonal space group P4/mmm. The structures essentially consist of two ABO3-x cubes stacked along the c axis in which the B cations are ordered on two crystallographically different sites. The divalent Ba cation is on average nine-coordinate and the trivalent M cation octahedrally coordinated to oxygen. The copper oxidation state and coordination varies with the oxygen level of the structure.

本文言語英語
ページ(範囲)921-929
ページ数9
ジャーナルJournal of Materials Chemistry
4
6
DOI
出版ステータス出版済み - 1月 1 1994
外部発表はい

!!!All Science Journal Classification (ASJC) codes

  • 化学 (全般)
  • 材料化学

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