Phase equilibria in the Ag2Te-ZnTe and Ag2Te-Znsystems

The state diagrams (T-x) of the systems Ag₂Te-ZnTe(I) and Ag₂Te-Zn(II) are offered on the ground of data obtained by differential thermal analysis, X-ray phase analysis, microstructural analysis and measurements of the density and the microhardness of samples synthesized. The systems studied are quasibinary sections of the ternary system Ag-Zn-Te. System I is characterized by two eutectic and three eutectoidal non-variant equilibria as well as by an intermediate compound Ag₂ZnTe₂, which melts congruently at 880°C. The latter exists in the range from 120 to 880°C in two polymorphic modifications (T_ʅ→β=515°C). System II is characterized by one eutectic, two eutectoidal and one peritectic nonvariant equilibria, boundary solid solutions on the ground of Ag₂Te and Zn and one intermediate phase of the composition Ag₄Zn₃Te₂, which melts congruently at 880°C.