THE Tl9ErTe6–Tl9BiTe6 SYSTEM AND SOME PROPERTIES OF SOLID SOLUTIONS

The phase relations in the Tl–Bi–Er–Te quaternary system on the Tl9ErTe6–Tl9BiTe6 composition area were investigated by using differential thermal analysis, X-ray diffraction, and microhardness measure-ments. Phase diagram, as well as concentration dependencies of the lattice parameters and microhard-ness, were constructed. It is established that the system is characterized by the formation of unlimited series of solid solutions with tetragonal Tl5Te3 structure type (). Obtained experimental data can be used for choosing the composition the growth of high-quality crystals of -phase which are of inte-rest like thermoelectric and magnetic materials