Synthesis of substitutional solid solutions in Na2O-P 2O5-In2O3- MI 2I IO3 (MIII = Cr, Fe, and Mn) systems

Article abstract of DOI:10.1134/S0036023612050099

Solid solutions based on Na₇(InP₂O₇) ₄PO₄ and Na₃In₂(PO₄) ₃, where chromium, iron, and manganese substitute for indium, have been prepared. When chromium and iron substitute for indium in Na ₇(InP₂O₇)₄PO₄, a continuous solid solution series exists. When manganese substitutes for indium, it enters the compound in the oxidation state +3. The substitution of chromium for indium in Na₃In₂(PO₄)₃ occurs within the range from 0.11 to 0.74 (mol/mol), and that of iron for indium, from 0.09 to 0.62 (mol/mol). When manganese substitutes for indium, it enters the structure of the crystalline phase in insignificant amounts as a two-charged cation.