CALCULATION OF THE GIBBS ENERGY OF MIXING IN CRYSTALS USING PITZERS MODEL

被引：29

作者：

CHRISTOV, C ^{[1
]}

PETRENKO, S ^{[1
]}

BALAREW, C ^{[1
]}

VALYASHKO, V ^{[1
]}

机构：

[1] RUSSIAN ACAD SCI,INST GEN & INORGAN CHEM,117907 MOSCOW,RUSSIA

来源：

JOURNAL OF SOLUTION CHEMISTRY | 1994年 / 23卷 / 07期

关键词：

MIXED CRYSTALS; ALKALI HALIDES; SULFATES HEPTAHYDRATES; THERMODYNAMIC FUNCTIONS; PITZERS MODEL;

D O I：

10.1007/BF00972674

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：

Pitzer's model has been applied to the thermodynamic study at 25-degrees-C of a series of systems of the type MeX-Me'X-H2O, MeX-MeX'-H2O (where Me, Me' = K, NH4,Rb and Cs; X, X' = Cl, Br and I), MeSO4-Me'SO4-H2O (where Me, Me' = Mg, Ni, Zn and Co). The integral Gibbs energy of mixing G(mix) and the excess Gibbs energy of mixing G(E)(s) are calculated, and simplified correlation equations are proposed for their calculation. The results obtained are compared with experimental data from the literature and with values calculated using various theories. The rational activity coefficients of the mixed crystal components are estimated. The energy of phase transition of one structure into another has been estimated for the isodimorphous mixed crystals in the system MgSO4-CoSO4-H2O.

引用

页码：795 / 812

页数：18

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