For the SnTe–PbTe–Bi2Te3 system, an analytical model of the temperature-composition dependencies of the crystallization surfaces of the SnTe, PbTe, Bi2Te3, compounds and the ternary PB(Sn)Bi2Te4, Pb(Sn)Bi4Te7, PB(Sn)Bi6Te10 phases formed on based on them was developed and visualized using the 3D analytical function of OriginLab software. The analytical multi-3D model of the phase diagram of the SnTe–PbTe–Bi2Te3 system allows drawing a three-dimensional image of the phases in equilibrium from different angles, obtaining 2D projections, and tabulating the coordinates of the phase diagram. These coordinates as form of matrices – 100x100 = 10.000 and 50x50 = 2500 tabular data create chance for selecting optimal composition and temperature values for the synthesis of alloys, and crystal growth

An analytical method was used for 3D modeling of crystallization surfaces of the MnTe–SnTe–Sb2Te3 system based on the existing data of boundary systems and a small number of experimental DTA- measurements. All analytical dependencies temperatures on composition for liquidus of the binary and three-system were obtained using the 2D and 3D options of the OriginLab software. The obtained results allowed us to visualize the crystallization surfaces of the phases based on initial components of the MnTe–SnTe–Sb2Te3 system as a separate form and in one graph