Russian Journal of Physical Chemistry A. Vol. 96, No. 2, Pages 235-240, 2022

^aSamara State Technical University (Samara Polytechnical), Samara, 443100 Russia

Abstract—The series of ternary reciprocal systems Na⁺, Ba²⁺||I⁻, ${\text{SO}}_{4}^{{2 - }}$ is analyzed, and the liquidus topology for unexplored systems of this series is predicted. Conversion partitioning into simplices is done, chemical interaction is described, and the tree of phases of the three-component reciprocal system Na⁺, Ba²⁺||I⁻, ${\text{SO}}_{4}^{{2 - }}$ is constructed. The system is studied experimentally via differential thermal analysis. The temperatures of melting and the compositions of nonvariant equilibrium points in stable elements of the system are revealed.

Keywords: physicochemical analysis, phase diagrams, barium sulfate, eutectic

Analysis of Ternary Reciprocal Systems Na+, Ba2+||Hal−, ${\mathbf{SO}}_{{\mathbf{4}}}^{{{\mathbf{2}} - }}$ (Hal− = F−, Cl−, Br−, I−) and Experimental Study of the System Na+, Ba2+||I−, ${\mathbf{SO}}_{{\mathbf{4}}}^{{{\mathbf{2}} - }}$

Analysis of Ternary Reciprocal Systems Na⁺, Ba²⁺||Hal⁻, ${\mathbf{SO}}_{{\mathbf{4}}}^{{{\mathbf{2}} - }}$ (Hal⁻ = F⁻, Cl⁻, Br⁻, I⁻) and Experimental Study of the System Na⁺, Ba²⁺||I⁻, ${\mathbf{SO}}_{{\mathbf{4}}}^{{{\mathbf{2}} - }}$