Thermal properties and thermochemistry of lanthanide chromates |
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| Authors: | Yu. L. Suponitskii |
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| Affiliation: | (1) D. I. Mendeleev Russian University of Chemical Technology, 9 Miusskaya pl., 125047 Moscow, Russian Federation |
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| Abstract: | The behavior of chromates Ln2(CrO4)3·7H2O and Rb5Ln(CrO4)2 (Ln = La, Pr, Nd, Sm, and Gd) was studied by derivatography as they were heated in air in a temperature interval of 300–1470 K. The high temperature enthalpies of LaCrO3 and YCrO3 at 865–1350 K and enthalpies of solution of La2(CrO4)3·7H2O in a solution of nitric acid at 298 K were measured by calorimetric methods. The standard enthalpies of formation were calculated for some compounds of composition Ln2(CrO4)3·2H2O and LnCrO3.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 290–295, February, 2005. |
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| Keywords: | chromites chromates lanthanides thermochemistry enthalpy thermal analysis |
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