METHOD OF SYNTHESISING MONOCRYSTALLINE IRON SELENIDES

摘要

FIELD: chemistry.SUBSTANCE: invention can be used for laboratory and industrial production of monocrystalline materials. A method of synthesising tetragonal iron monoselenide includes heating a hermetic vial with a charge from selenium and iron placed in one of its ends and filled with a salt melt. The vial heating is performed with the temperature gradient from a value of 450°C-350°C from the side of the charge location to a temperature, reduced by 30°C-100°C from the opposite side. As the salt melt used are mixtures of eutectic composition, which includes aluminium chloride. Heating is performed for the time necessary for the transfer of the selenium and iron charge into the opposite end of the vial.EFFECT: invention makes it possible to increase coarseness of FeSe crystals with reduction of their synthesis temperature.2 cl, 1 dwg, 4 ex