Calorimetric data and phase equilibrium assessment in silicate systems - Optimization of mixing properties of silicate melts

The thermodynamic data are assessed by using molecular solution model with excess Gibbs energy of mixing expressed by Redlich-Kister equation with tem perature dependent parameters. The optimized data involve phase equilibria, enthalpy and entropy of formation of crystalline phases, heat capacity (C- p) data of solid and liquid pure components, enthalpy of mixing of liquid p ure components, enthalpy and entropy of fusion of solid phases. Thermodynam ic quantities consistent with available experimental phase equilibria and c alorimetric measurements are established for solid phases and liquids in th e system CaO . SiO2 (CS)-CaO . Al2O3. 2SiO(2) (CAS(2))2CaO . Al2O3. SiO2 (C (2)AS).