SYNTHESIS OF CRYSTALS OF ULTIMATE SULFIDES IN SULFUR MELT IN A STATIONARY TEMPERATURE GRADIENT

The possibilities of crystal growth of ultimate sulfides in molten sulfur in a stationary temperature gradient are described. The optimum synthesis mode is achieved when the temperature of the hot end (charge) is 550°C, the temperature of the cold end (crystallization) is 460°C. As a result, crystals of TiS₃, ZrS₃, HfS₃, V₄₀S₆₀, NbS₃, TaS₃, PdS₂, CuS, Ag₂S, metallic Au, HgS, CdS, Ga₂S₃, In₂S₃, SiS₂, SnS₂, PbS, Sb₂S₃ and Bi₂S₃ of millimeter and submillimeter size were obtained. Only polycrystalline agglomerates of tens of microns in size were obtained when transferring some metals, such as tungsten. The possibility of obtaining crystals of double sulfides is shown using CrPS₃ as an example. The considered technique allows obtaining crystals of the required quality without using special equipment. The small size of the crystals is sufficient for laboratory study.