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Synthesis, crystal and electronic structures, and thermodynamic characteristics of BaCe 1 − x In x O 3 − x /2 solid solutions

Synthesis, crystal and electronic structures, and thermodynamic characteristics of BaCe 1 − x In x O 3 − x /2 solid solutions,10.1134/S003602361007003

Synthesis, crystal and electronic structures, and thermodynamic characteristics of BaCe 1 − x In x O 3 − x /2 solid solutions  
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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.
Journal: Russian Journal of Inorganic Chemistry - RUSS J INORG CHEM , vol. 55, no. 7, pp. 1002-1009, 2010
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