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Information × Registration Number 0221U102248, 0116U001946 , R & D reports Title Structure and properties of multicomponent chalcogenide compounds popup.stage_title Head Shemet Vasylyna Ya, Registration Date 29-01-2021 Organization Lutsk National Technical University popup.description2 The work is devoted to a comprehensive study of the nature of the interaction of elements in multicomponent chalcogenide systems containing rare earth metals and copper; study of crystal structures and physical properties of compounds formed in chalcogenide systems; establishment of regularities of interaction of components and crystal chemical features of structural types; study of the influence of technological aspects on the formation of defects in the crystal structure of PbI2 single crystals obtained from the melt; study of the effect of doping of PbI2 single crystals with impurities of transition metals on their electrophysical properties. The method of obtaining new chalcogenide compounds formed by binary semiconductor compounds, the components of which are REM (rare earth metals), p- and d-elements of groups I, II, p-elements of groups III, IV of the periodic system of elements DI has been improved. Mendeleev and chalcogens (p-elements of group VI). New ternary and tetrar materials of selenide-telluride and sulfide-telluride systems with yttrium (erbium) and copper were synthesized, the nature of interaction between elements in these systems was analyzed. An isothermal cross section of the Er2S3 – In2S3 – Ga2S3 system at a temperature of 770 K was constructed. (III), Ga3.46In1.58Yb4.96S15 (IV) and their crystal structures were investigated by X-ray diffraction analysis. They crystallize in the spatial group C2/m with cell periods: a = 2.34104 (6) nm, b = 0.381242 (12) nm, c = 1.25460 (4) nm, β = 90.775 (3) º (I); a = 2.35181 (17) nm, b = 0.38064 (3) nm, c = 1.25592 (9) nm, β = 90.954º (II); a = 2.35474 (8) nm, b = 0.378634 (15) nm, c = 1.25164 (4) nm, β = 90.988 (3) º (III), a = 2.34427 (7) nm, b = 0.377641 (8) nm , c = 1.24970 (3) nm, β = 90.970º (IV). The existence of the compound Pr2PbSe4 (spatial group I 3d, a = 0.89916 nm) was revealed. The length of regions of homogeneity of phases with structure of type Th3P4 in R2X3-PbX systems (R = REM; X = S, Se) f Product Description popup.authors Hulay Olga I Moroz Irina A Furs Tetyana V Shevchuk Mykola V popup.nrat_date 2021-01-29 Close