METHOD FOR PRODUCTION OF BISMUTH GERMANATE-SILICATE WITH SILLENITE STRUCTURE Russian patent published in 2023 - IPC C01G29/00 C30B29/32 C30B29/34 

FIELD: chemistry.

SUBSTANCE: invention relates to the field of chemistry; it can be used for the production of a polycrystal triple compound with a sillenite structure (Bi₁₂(Ge_xSi_1-x)O₂₀), which can be used as a source charge for monocrystals. A method for the production of bismuth germanate-silicate with a sillenite structure is proposed, including preliminary mechanical mixing of initial powders of oxides of bismuth (Bi₂O₃), germanium (GeO₂), and silicon (SiO₂), heating of the resulting mixture in a platinum crucible to a set temperature. According to the invention, initial powders of Bi₂O₃ – 85.7 mol.%, GeO₂ – 0.3-13.3 mol.%, and SiO₂ – 1-14 mol.% are mixed, heated to a temperature of 1060-1160°C with exposure at this temperature range for 20-60 min, after which the resulting melt is poured onto platinum substrate.

EFFECT: proposed method allows for provision of the production of compounds with a crystal sillenite structure Bi₁₂(Ge_xSi_1-x)O₂₀, deprived of side impurity phases, as well as reduction in synthesis time without introduction of additional reaction components.

1 cl, 8 dwg, 2 ex