Using the multipurpose genetic algorithm, the analytical models of phase diagrams of the Tl₉SmTe₆–Tl₈Pb₂Te₆ and Tl₉SmTe₆–Tl₉BiTe₆ systems as temperature dependencies of compositions of the equilibrium phases were obtained. The boundaries of the uncertainty band for the liquidus and solidus curves of solid solutions are determined. According to the model of regular solutions of non-molecular compounds, the thermodynamic functions of mixing solid solutions depending on the composition and temperature are determined. It was found that solid solutions based on the Tl₉SmTe₆, Tl₈Pb₂Te₆ and Tl₉BiTe₆ compounds are thermodynamically stabile in the whole concentration range

doi.org/10.32737/0005-2531-2020-4-12-16