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The results of oxygen nonstoichiometry, δ, as well as chemical expansion as functions of oxygen partial pressure pO 2 and temperature are presented for the perovskite-type undoped manganite LaMnO 3±δ . The modeling of the defect structure of this perovskite is carried out in both deficit and excess oxygen regions. Within the framework of the model electrons and electron holes are assumed...
The results of the isothermal expansion as a function of oxygen partial pressure p O2 and temperature are first presented for the perovskite-type undoped cobaltite LaCoO 3−δ . The modeling of the chemical expansion of this oxygen deficient perovskite on the basis of its defect structure is carried out. The chemical expansion model based on the relative change of the mean ionic radius...
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