METHOD OF PRODUCING BISMUTH GERMANATE BiGeO Russian patent published in 2017 - IPC C01G17/00 C01G29/00 C04B35/453 C04B35/622 C04B35/626 B01J37/08 B01J23/14 B01J23/18 

FIELD: chemistry.

SUBSTANCE: method involves preliminary mechanical mixing of the initial bismuth oxide powders Bi₂O₃ and germanium oxide GeO₂, heating the resulting mixture in a platinum crucible to a temperature of 1050-1160°C, holding in the molten state in the crucible for, at least, 15 minutes followed by cooling also in the crucible.

EFFECT: producing bismuth germanate with a high number of internal stresses, which allows to extract it from the platinum crucible by simple tapping and shaking, which allows to prolong the life of an expensive crucible, since extraction of the material synthesized from it takes place without destruction and severe deformation.

4 dwg, 1 ex