Calculation of phase diagrams and thermodynamic properties of 18 binary common-ion systems of Na,K,Ba//F,MoO₄,WO₄

Abstract

Phase diagram and thermodynamic data of 18 binary common-ion molten salt systems in Na,K,Ba//F,MoO,,WO, were optimized by computer algorithm. The phase diagram data as well as single-salt data were retrieved from an extensive critical literature search. Expressions for the excess properties of solution phases and thermodynamic properties of intermediate compounds were thereby obtained. These data were used to generate a "best" phase diagram for each binary system considered.Key words: molten salts, phase diagrams, thermodynamic properties.Resume : On a fait un lissage par ordinateur des donnCes thermodynamiques et des diagrammes de phases de 18 systemes de sels fondus d'ions communs reprCsentCs par Na,K,Ba//F,MoO,,WO,. Les donnCes de diagramme de phases et des sels purs ont CtC obtenues 2 moyen d'une recherche critique bibliographique assez complete. On a donc obtenu des expressions analytiques pour les propriCtCs en excLts des solutions ainsi que les propriCtCs thermodynamiques des composCs intermbdiaires. Ces expressions ont CtC utilisCes dans le calcul du diagramme de phases de chaque systeme.