Some Issues of Complex Studies of Phase Equilibria and Thermodynamic Properties in Ternary Chalcogenide Systems Involving Emf Measurements (Review)

Abstract

We address the methodology of a complex study of phase equilibria and thermodynamic properties in ternary metal and semiconductor systems using the emf method. A focus is on the behavior of partial molar functions in heterogeneous phase fields in the context of Voronin’s concept of partial heterogeneous functions (PHFs). The applicability criteria of emf measurements in heterogeneous phase fields for thermodynamic calculations have been determined. The scheme for calculating the integral thermodynamic functions (ITFs) of ternary phases from the partial molar functions of one component and the phase diagram using the integration of the Gibbs–Duhem equation has been described. Numerous thermodynamic data for ternary chalcogenide and chalcohalide systems gained by various variants of the emf method are cited.