Free Energy of Solution in Binary Silicate Melts

Abstract

A theoretical calculation of the free energy of solution of binary silicates is presented. Based on a random network model, a quasi-lattice treatment was applied to evaluate the partition function which has a parameter characteristic of the basic oxides. Calculated activities of the components and the free energy of solution as functions of composition fairly well reproduce experimental results. A basicity scale of oxides was defined in terms of the parameter.