The character of the chemical interaction and glass formation in the As 2 S 3-CuCr 2 Te 4 system was explored by means of physicochemical analysis (DTA, MSA, XRD, density and microhardness measurements) and a phase diagram was constructed. It was established that the state diagram of the system is a quasi-binary eutectic type. In the system narrow homogeneous regions of up to 1.5 mol % As 2 S 3 and 3.5% mol % CuCr 2 Te 4 were detected. Compounds As 2 S 3 and CuCr 2 Te 4 with each other form a eutectic composition of 10 mol. % СuCr 2 Te 4 with a melting point of 270 o C. Under ordinary conditions, in the As 2 S 3-CuCr 2 Te 4 system based on As 2 S 3 , the glass-forming region reaches 15 mol % CuCr 2 Te 4 .

The character of the chemical interaction and glass formation in the AsSe-NdAs 2 Se 4 system was studied by physico-chemical analysis methods (DTA, RFA, MSA), as well as by measuring the microhardness and density, and a state diagram of this system was plotted. It is established that the AsSe-NdAs 2 Se 4 system is partially quasi-binary section of the As-Nd-Se ternary system. Solid solutions on the basis of the starting components have not been practically established. In the system with slow cooling, the glass formation region on the basis of AsSe reaches 15 mol% NdAs 2 Se 4 , and 20 mol% NdAs 2 Se 4 in the quenching regime on ice water.