A thermodynamic study of Cu—Tl—S system by EMF method with Cu4RbCl3I2 solid electrolyte

Abstract

The Cu—Tl—S system was studied by the EMF method with Cu4RbCl3I2 solid Cu+-conducting electrolyte within the temperature range from 300 to 390 K. The earlier plotted solid-phase equilibrium diagram of this system was confirmed, the partial copper molar functions \( (\Delta \bar G,\Delta \bar H,\Delta \bar S) \)) in alloys and standard thermodynamic formation functions and standard entropies of CuTlS2, CuTlS, Cu3TlS2, and Cu9TlS5 ternary compounds were calculated. The derived results demonstrated an opportunity of thermodynamic studies of copper-containing ternary systems of this modification by EMF method even if they contain a less noble component than copper.