Thermodynamical study of (CaGa2S4)x(BaGa2S4)1-x solid solutions

The solid solutions of CaxBa1-xGa2S4 (x = 0, 0.1, horizontal ellipsis , 1) were synthesized by solid-phase reactions from powder components of CaS, BaS, and Ga2S3. The temperature-concentration dependences of the Gibbs free energy of formation of (CaGa2S4)(x)(BaGa2S4)(1-x) solid solutions from ternary compounds and phase diagrams of the CaGa2S4-BaGa2S4 were determined by a calculation method. It was revealed that continuous solid solutions are formed in these systems. The spinodal decomposition of (CaGa2S4)(x)(BaGa2S4)(1-x) solid solutions into two phases is predicted at ordinary temperatures.

Automated summary

The solid solutions of CaxBa1-xGa2S4 were synthesized by solid-phase reactions from powder components of CaS, BaS, and Ga2S3, and the temperature-concentration dependences of their Gibbs free energy of formation were determined. Continuous solid solutions were found in these systems, with spinodal decomposition predicted for ordinary temperatures in the solid solutions.