Thermodynamical study of (CaGa<sub>2</sub>S<sub>4</sub>)<i><sub>x</sub></i>(BaGa<sub>2</sub>S<sub>4</sub>)<sub>1-<i>x</i></sub> solid solutions

Naghiyev T., Rzayev R. M.

MODERN PHYSICS LETTERS B, vol.35, no.31, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 35 Issue: 31
  • Publication Date: 2021
  • Doi Number: 10.1142/s0217984921504698
  • Journal Name: MODERN PHYSICS LETTERS B
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Chemical Abstracts Core, INSPEC, zbMATH
  • Azerbaijan State University of Economics (UNEC) Affiliated: Yes

Abstract

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.