Phase Complex Modeling for the Na+,Sr2+||Cl–, Three-Component Reciprocal System

Phase equilibria were modeled in the form of a three-dimensional phase diagram for the Na + ,Sr 2+ ||Cl – , three-component reciprocal system in the KOMPAS-3D program. The model used the invariant point coordinates determined in the prior study of the system. The largest crystallization field belongs is that of strontium tungstate due to its high melting temperature (1535°С). The system forms a congruently melting compound Na 3 ClWO 4 ; its phase complex is divided into three stable triangles. The model was used to plot prognostic (isothermal and polythermal) sections and to get liquidus surface isotherms of the system. Described are also the molar balance of the components and phases of the system and a calculation algorithm in the MO Excel environment for quantifying chemical reactions in a mixture of a given composition and for calculating reaction products.