Lanthanide rhenium oxide single crystals from hydrothermal fluids: Synthesis and Structures of Ln2ReO5 (Ln = Pr, Nd), Ln3ReO7 (Ln = Gd and Tb) and Ln6ReO12 (Ln = Yb, Lu)
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Abstract Heat capacities and enthalpies of formation of BaGd2O4were determined by high‐temperature differential scanning calorimetry and high‐temperature oxide melt solution calorimetry, respectively. Thermodynamic stability of BaLn2O4compounds increases with decreasing Ln3+ionic radius. Previously reported data on BaNd2O4and BaSm2O4corroborate this trend. Missing data for compounds in BaO–Ln2O3(Ln = La, Pr, Eu, Er) systems were estimated from established relations, thermodynamic assessment was performed, and binary phase diagrams were calculated.more » « less
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