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.

Alloys of the As2Se3-NdSe system were synthesized in a wide range of concentrations. The As2Se3-NdSe system was studied by differential thermal (DTA), X-ray diffraction (XRD), microstructural (MSA) analysis, as well as by measuring microhardness and density. The system has small single-phase fields based on primary components. In the As2Se3-NdSe system, the area of the solid solution based on the As2Se3 compound at room temperature is 1.5 mol. %, and the area of the solid solution based on the NdSe compound is 2.0 mol. %. Upon slow cooling in the As2Se3-NdSe system based on As2Se3, the glass formation region reaches 17 mol % NdSe. The photo- and electrical conductivity of glassy alloys of the As2Se3-NdSe system containing (As3Se3)1-x(NdSe)x (x = 0.03; 0.05; 0.07; 0.10) has been studied