eutectic

The character of the interaction in the TlAs2Se3Te–TlAs2Te3Se system was studied by the methods of DTA, RFA, MSA, and also by measuring the microhardness and determining the density. State diagram of the system was constructed. It was established that the TlAs2Se3Te–TlAs2Te3Se system is partially a quasibinary section of the quaternary As, Tl//Se, Te system. One congruently melting compound TlAs2Se2Te2 is formed in the system at 548 K.

Theoretical calculations in the oxides systems RO-SnO2-Al2O3-SiO2, where RO – CaO, ZnO and BaO, have been done. Their structure has been established; eutectic and geometer-topological characteristics have been calculated. The process of the conodes adjustment at 1100 K has been revealed.