Affiliation:
1. Thermochemistry of Materials Scientific Research Centre NUST MISIS Moscow Russia
2. Laboratory of Thermal Analysis and Calorimetry Kurnakov Institute of General and Inorganic Chemistry Moscow Russia
Abstract
AbstractIn this study, enthalpies of formation of compounds RE2Hf2O7 type (where RE = La, Pr, Nd, Sm, Eu, and Gd), with pyrochlore structure have been measured by high‐temperature oxide melt solution calorimetry. Results were compared with literature data, and dependencies of enthalpies of the formation of compounds with the pyrochlore structure from the ionic radius of rare‐earth element were analyzed. The enthalpy of formation becomes more positive with the increase in ionic radius, which is in conformity with the results earlier observed for titanates and zirconates.
Funder
Russian Science Foundation
Subject
Materials Chemistry,Ceramics and Composites