Enthalpies of formation from the component oxides of MgWO4, CaWO4 (scheelite), SrWO4, and BaWO4, determined by high-temperature direct synthesis calorimetry

被引：22
|
作者：
Guo, QT
Kleppa, OJ
机构：
[1] UNIV CHICAGO,JAMES FRANCK INST,CHICAGO,IL 60637
[2] CHINESE ACAD SCI,INST GEOCHEM,GUIYANG 550002,GUIZHOU,PEOPLES R CHINA
来源：
THERMOCHIMICA ACTA | 1996年 / 288卷 / 1-2期
关键词：
alkaline-earth tungstates; enthalpy of formation; high-temperature direct synthesis calorimetry; scheelite;
D O I：
10.1016/S0040-6031(96)03026-2
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
The enthalpies of formation, from the constituent oxides, of tungstates of alkaline earth metals, MeWO(4)(Me is Mg, Ca, Sr, Ba), have been determined by direct synthesis calorimetry at 1473 +/- 2 K. The following values of Delta H-f at 298 K (kJ mol(-1)) are reported: MgWO4, -73.9 +/- 4.8; CaWO4 (scheelite), -168.5 +/- 3.3; SrWO4, -2179 +/- 3.6; BaWO4, -256.2 +/- 3.9. The results are compared with data available in the literature.
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页码：53 / 61
页数：9
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