Thermodynamic properties of NaZr2(PO4)3

被引：9
|
作者：
Pet'kov, VI [1 ]
Kir'yanov, KV [1 ]
Orlova, AI [1 ]
Kitaev, DB [1 ]
机构：
[1] NI Lobachevskii State Univ, Nizhnii Novgorod 603600, Russia
来源：
INORGANIC MATERIALS | 2000年 / 36卷 / 04期
基金：
俄罗斯基础研究基金会;
关键词：
D O I：
10.1007/BF02758087
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The heat capacity of crystalline NaZr2(PO4)(3) was measured between 7 and 340 K by adiabatic calorimetry. The results were used to calculate the thermodynamic functions C-p(0), H-0(T) - H-0(0), S-0(T), and G(0)(T)- H-0(0) in the range 0-340 K. The absolute entropy was found to be S-0(NaZr2(PO4)(3), cr, 298.15 K) = 327.1 +/- 1.0 J/(mol K), and the standard entropy of formation Delta(f)S(0)(NaZr2(PO4)(3), cr, 298.15 K) = -1101 +/- 1 J/(mol K). Solution calorimetry was used to determine the standard enthalpy of formation, Delta(f)H(0)(NaZr2(PO4)(3), cr, 298.15 K) = -5236 +/- 5 kJ/mol. By combining the data obtained by the two techniques, the standard Gibbs energy of formation was determined to be Delta(f)G(0)(NaZr2(PO4)(3), cr, 298.15 K) = -4908 +/- 5 kT/mol.
引用
收藏
页码：387 / 391
页数：5
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