The thermochemical properties of Y2Si2O7 and Dy2Si2O7

被引：16

作者：

Cordfunke, EHP ^{[1
]}

Booij, AS ^{[1
]}

van der Laan, RR ^{[1
]}

机构：

[1] Netherlands Energy Res Fdn, ECN, NL-1755 ZG Petten, Netherlands

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 1998年 / 30卷 / 02期

关键词：

yttrium silicate; dysprosium silicate; enthalpy increment; enthalpy of formation; thermodynamic properties;

D O I：

10.1006/jcht.1997.0291

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The enthalpy increments of Y2Si2O7 and Dy2Si2O7 have been measured by drop-calorimetry from T = (516.7 to 928.4) K, and T = (516.7 to 918.2) K, respectively. The standard molar enthalpy of formation of monoclinic Y2Si2O7 has been deduced from its enthalpy of solution in (6.20 mol.dm(-3) HCl + 0.147 mol.dm(-3) HF)(aq), and the value Delta(f)H(m)(o)(298.15 K) = -(3854.8 +/- 6.8) kJ.mol(-1) has been obtained. For Dy2Si2O7 the standard molar enthalpy of formation -(3776.1 +/- 4.6) kJ.mol(-1) has been estimated. (C) 1998 Academic Press Limited.

引用

页码：199 / 205

页数：7

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