FIELD: chemistry.
SUBSTANCE: invention relates to production of monocrystals of fluorides from melt for use in optics. Device for growing monocrystals of fluorides 10 from melt 9 by drawing down comprises crucible-heater 5 made from graphite in form of vertically installed hollow thin-walled cylinder, equipped in lower part with cover 6 made from graphite with a hole of an arbitrary shape, repeating required section of grown crystal 10, wherein cross section of hole in cover is not more than 1.5 mm, its length is 0.1-1.0 mm, cover 6 is detachable with possibility of repeated mounting-dismantling and crucible-heater 5 is equipped with electric lines 7, 8, made of refractory material, for example graphite.
EFFECT: invention enables to grow monocrystals of fluorides of high optical quality in form of fibres and rods with rectangular or round section with typical dimensions from 0,2 to 1,5 mm.
1 cl, 7 dwg
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