The New Oxygen-Deficient Fluorite Bi3NbO7: Synthesis, Electrical Behavior and Structural Approach
作者： A Castro , E Aguado , J.M Rojo , P Herrero , R Enjalbert
DOI: 10.1016/S0025-5408(97)00190-6
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摘要: Abstract A new single phase of composition Bi3NbO7 has been isolated in the binary system Bi2O3–Nb2O5. X-ray crystal diffraction studies have shown that crystallizes cubic system, space group Fm 3 m, with unit-cell parameter a = 5.4788(9) A. The structure determined, and final reliability index is R 0.027. exhibits defect fluorite-type 12.5% anion vacancies appears to show disorder both anionic cationic lattices. study by electron high resolution microscopy presence an incommensurate lattice. shows good behavior as ionic conductor up 875°C without any transition deduced from impedance measurements.
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