High pressure synthesis and structural characterization of the deficient perovskite Ba0.88NbO2.3
作者： J.A. Alonso , M.T. Casais , M.J. Marti´nez-Lope
DOI: 10.1016/0025-5408(94)00126-X
关键词: Crystallography 、 Materials science 、 Inorganic chemistry 、 Hydrostatic pressure 、 Crystal structure 、 Crystallographic defect 、 Perovskite (structure) 、 Oxygen 、 Rietveld refinement 、 Metal 、 Stoichiometry
摘要: The title compound has been prepared from BaO, NbO{sub 2} and Nb mixtures, at 1,200 C under an hydrostatic pressure of 12 kbar. It is cubic, a = 4.3239(4) {angstrom}, the Rietveld analysis X-ray diffraction profile shows strong deficiency in both Ba oxygen positions. Unlike metallic BaNbO{sub 3}, this defect perovskite insulating behavior, vacancies hindering electronic delocalization along structure.
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