FIELD: physics.
SUBSTANCE: optical material is a single crystal indium InI monochloride of rhombic syngony with a spectral transmission region of up to 51 mcm. A method of producing InI includes a pre-treatment of the initial charge by rectification, the growing of the single crystal by Bridgman method at a speed of broach of not more than 2.0 mm/h in a quartz ampoule made of glass "Pyrex", the separation of the muddy part from the end part of the grown crystal and the fourfold crystal-physical clearance obtained at the previous stage of the high-purity material by re-growing the crystal with the intermediate separation of the end muddy part of the crystal after each cleaning.
EFFECT: invention allows to obtain single crystals of InI, transparent from the visible to the far infrared range of the spectrum, non-hygroscopic.
2 cl, 3 dwg, 1 tbl, 6 ex
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