焦绿石
离子半径
标准生成焓变
标准生成焓
量热法
焓
离子键合
氧化物
半径
稀土元素
热力学
物理化学
材料科学
无机化学
化学
稀土
离子
矿物学
冶金
物理
有机化学
相(物质)
计算机科学
计算机安全
作者
I. Bajenova,A. V. Guskov,П. Г. Гагарин,Alexandra Khvan,К. С. Гавричев
摘要
Abstract In this study, enthalpies of formation of compounds RE 2 Hf 2 O 7 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.
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