Calorimetric measurements on rare earth pyrohafnates RE2Hf2O7 (RE = La,Eu,Gd)

被引：18

作者：

Babu, R ^{[1
]}

Nagarajan, K ^{[1
]}

机构：

[1] Indira Gandhi Ctr Atom Res, Div Fuel Chem, Chem Grp, Kalpakkam 603102, Tamil Nadu, India

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1998年 / 265卷 / 1-2期

关键词：

calorimetry; thermodynamic functions; pyrochlore; nuclear waste management; rare earths; pyrohafnates;

D O I：

10.1016/S0925-8388(97)00430-1

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Enthalpy increment measurements have been carried out on La2Hf2O7, Eu2Hf2O7 and Gd2Hf2O7 in the temperature range 980-1740 K by using a high temperature differential calorimeter. From the enthalpy values, other thermodynamic functions, such as heat capacity, entropy and free energy functions have been generated. The high temperature C-p data of the rare earth pyrohafnates obtained in this study are discussed in relation to the crystal chemistry of these pyrochlores. (C) 1998 Elsevier Science S.A.

引用

页码：137 / 139

页数：3