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 temperature 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 pure components, enthalpy and entropy of fusion of solid phases. Thermodynamic quantities consistent with available experimental phase equilibria and calorimetric measurements are established for solid phases and liquids in the system CaO . SiO2 (CS)-CaO . Al2O3. 2SiO(2) (CAS(2))2CaO . Al2O3. SiO2 (C(2)AS).