PHASE EQUILIBRIUM IN Tl₅Te₃-Tl₄PbTe₃-Tl₉BiTe₆ SYSTEM

Phase equilibriums in the Tl₅Te₃-Tl₄PbTe₃-Tl₉BiTe₆ (A) system were investigated using DTA, EMF, X-ray methods and measurement of microhardness. Three ray polythermal sections as Tl₅Te₃-Tl_8+х+yPb_уBiх_{Te6 type, projection of liquidus and solidus surfaces of the system (A) and graphics of dependence of microhardness, EMF and parameters of crystalllatice on concentration were constructed. It was established that the system (A) is characterized by formation of non-limited solid solutions with tetragonal structure as Tl5Te3 type.}