Abstract
Investigation of multicomponent salt systems is important in the context of the wide use of invariant mixtures as electrolytic media for separation of metals and heat-storage materials. In this work, the quaternary reciprocal system Na,K∥Cl,I,CrO4 was partitioned into simplexes using graph theory. The tree of phases of the system was constructed, and stable elements were determined. The stable tetrahedron NaCl–KCl–KI–K2CrO4 of the system Na,K∥Cl,I,CrO4 was studied by differential thermal analysis. In the stable tetrahedron, the melting point and composition (equiv. %) of a quaternary eutectic were found: (0.25% KCl, 42.40% NaCl, 30.92% KI, 26.43% K2CrO4; 451°C).
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