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Symmetry reduction in the basic structure of thortveitite‐type compound FeInGe2O7–mC22 (C12/m1, No. 12) promoted by the incorporation of yttrium in the formula FeIn1−xYxGe2O7 gives rise to a derivative structure called thortveitite‐like AA′Ge2O7–mP44, with symmetry described by the space group P121/m1 (No. 11) for x = 0.50, 0.75 and 0.90. The structure remains unchanged within the structural type...
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