The paper presents a theoretical and experimental study of the three-component mutual system Na+ ,Sr2+||F- ,WO4 2-. In the theoretical part, geometric modeling of phase complex is carried out. The thermodynamic method, according to Hess’s law, confirmed the partition variant with three phase triangles NaF – SrF2 – SrWO4 , NaF – 2NaF•Na2 WO4 – SrWO4 , 2NaF•Na2 WO4 – SrWO4 – Na2 WO4 . In accordance with the chosen partition option, the simulation of the liquidus variants of the three-component mutual system Na+ ,Sr2+||F- ,WO4 2- has been carried out.
