Synthesis, crystal and electronic structures, and thermodynamic characteristics of BaCe₁ − x In x O₃ − x/₂ solid solutions

New perovskite oxide phases BaCe₁ − x In x O₃ − x/₂ (x = 0.1-0.8) (space group Pbnm) have been synthesized. The unit cell volume of the resulting solid solutions monotonically decreases with an increase in the degree of substitution of indium for cerium due to the contraction of octahedra in perovsk...

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Bibliographic Details
Published in:Russian journal of inorganic chemistry 2010-07, Vol.55 (7), p.1002-1009
Main Authors: Chupakhina, T. I, Matskevich, N. I, Bazuev, G. V, Ovechkina, N. A, Galakhov, V. R, Raeckers, M, Neumann, M
Format: Article
Language:English
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Summary:New perovskite oxide phases BaCe₁ − x In x O₃ − x/₂ (x = 0.1-0.8) (space group Pbnm) have been synthesized. The unit cell volume of the resulting solid solutions monotonically decreases with an increase in the degree of substitution of indium for cerium due to the contraction of octahedra in perovskite blocks. The thermodynamic stability of the compound BaCe₀.₇₅In₀.₂₅O₂.₈₇₅ was studied by the solution calorimetry method, and barium cerates were shown to be thermodynamically stable with respect to binary oxides at room temperature. The structure of occupied and vacant states in BaCe₁ − x In x O₃ − x/₂ was determined on the basis of X-ray emission, absorption, and photoelectron spectra, and the energy gap was estimated at ∼2 eV.
ISSN:0036-0236
1531-8613
DOI:10.1134/S003602361007003X