Abstract
The structure of the (La0.9Sr0.1)(Ga0.56Fe0.24Mg0.20)O2.85 + y oxide is investigated using neutron powder diffraction at temperatures of 10, 295, and 1000 K. The results of the structure refinement are in good agreement with the dilatometric and thermogravimetric data and confirm the inference that the valence state of iron cations is higher than 3+ and that the lattice undergoes an additional expansion due to the oxygen loss at temperatures above 870 K.
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