METHOD OF PRODUCING ESPECIALLY PURE SULPHIDES OF P-ELEMENTS OF GROUP III Russian patent published in 2014 - IPC C01G1/12 C01G15/00 C01F7/70 

FIELD: chemistry.

SUBSTANCE: invention relates to inorganic chemistry and specifically to producing sulphides of p-elements of group III, which are promising materials for semiconductor optoelectronic engineering and infrared optics. Sulphides of p-elements of group III are obtained by reacting sulphur and a corresponding p-element in an evacuated quartz ampoule, wherein the p-element is used in form of a corresponding iodide, synthesis is carried out in a two-section ampoule, initial components are placed in the bottom section which is heated to 250-400°C, after which the obtained sulphide is calcined at temperature not higher than 700°C. By conducting synthesis at sufficiently low temperature, the method considerably reduces contamination of the equipment with the material. The highest possible output of the product is 82-97%.

EFFECT: invention enables to obtain especially pure sulphides of p-elements of group III, in which content of transition metal impurities, according to mass spectrometric analysis, is not higher than 0,5 ppm wt.

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