METHOD OF GROWING MONOCRYSTALS OF LITHIUM-BISMUTH MOLYBDATE Russian patent published in 2014 - IPC C30B9/04 C30B9/12 C30B29/32 

FIELD: chemistry.

SUBSTANCE: invention relates to field of chemical technology and deals with obtaining volumetric crystals with composition Li₈Bi₂(MoO₄)₇. Crystals are grown from solution-melt of lithium-bismuth molybdate in solvent by crystallisation with gradual cooling of melt and grown crystals, and as solvent used is eutectic mixture, containing 47 mol.% of molybdenum oxide and 53 mol.% of lithium molybdate with content of lithium-bismuth molybdate and eutectic mixture equal 10-40 mol.% and 90-60 mol.% respectively, growing is performed under conditions of low temperature gradients, constituting less than 1 grad/cm, on primer, oriented by [001] and rotating at rate 20-30 rev/min with pulling rate 0.5-2.0 mm/day with constant cooling of solution-melt at rate 0.2-5.0 degree/day with further separation of grown crystals from solution-melt and cooling them to room temperature.

EFFECT: invention makes it possible to obtain large (with size 20÷30 mm) Li₈Bi₂(MoO₄)₇ crystals of high optic quality.

1 ex