Abstract
The chemical interaction in the Sb2Se3-Ho2Se3 system was studied by physicochemical analysis methods (by differential thermal, X-ray powder diffraction, and microstructural analyses and also by density and microhardness measurements). The state diagram of the system was constructed. It was found that the Sb2Se3-Ho2Se3 section is a quasi-binary section of the Ho-Sb-Se ternary system. In the system, the compound HoSbSe3 forms, which melts incongruently at 1050 K and crystallizes in the rhombic system at the unit cell parameters a = 11.855 A, b = 11.316 A, c = 4.139 A, and Z = 4 in the space group Pbnm-D2h16. The solubility of solid solutions based on Sb2Se3 at room temperature reaches 8 mol % Ho2Se3, whereas solid solutions based on Ho2Se3 were not detected.
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