Siberian Federal University

Prediction of the phase complex of system NaF-NaI-Na2WO4 has been holded on the basis of phase equilibrium in the row of ternary systems NaF-NaHa -Na2WO4 (Hal - Cl, Br, I). We have methods for prediction characteristic of a ternary eutectic on basis of series exploration the single-type twocomponent and ternary system, comparative research its liquidus character, as well as building a series of dependencies. The three-component system NaF-NaI-Na2WO4 has been studied by the differential thermal analysis. As a result we have defined melting point temperature, and the compositions ternary eutectic mixture. We also have described the non and invariant equilibria.