A Four-Component Reciprocal System of Tungstate and Sulfates of Lithium, Sodium, and Lead

Abstract

The topology of the phase diagram of the four-component mutual system Li,Na,Pb//WO4,SO4 has been analyzed. It is shown that it is saturated with the formation of double compounds, as well as triple bonding. Triangulation of the phase diagram into stable elements has been carried out by the graph method and the main chemical reactions of exchange by the conversion method have been revealed. The phase diagram of the internal stable section Li2SO4 -Na2SO4 -PbWO4 was studied by the differential thermal analysis, the coordinates of the three ternary nonvariant points, including eutectics, peritectics and transition point of wedging were revealed. The possibility of chemical synthesis of lead oxide tungsten bronzes in eutectic melts of the three-component system Li2SO4 Na2SO4 -PbWO4 has been shown.