FIELD: chemical technology. SUBSTANCE: method involves hydrothermal crystallization of reaction mixture which contains sources of SiO2 and Ga2O3 in aqueous-alkaline medium. The source of parental Si-compound fine dust of metallurgic manufacture at particle size 0.1-5.0 mc which contains 86-99 wt. -% SiO2 and impurities also. Reaction mixture does not contain organic compounds of nitrogen and hydrocarbons. Stirring is carried out at the following mole ratio: SiO2:Ga2O3 40-140; OH-:SiO2 0.2-0.6; H2O:SiO2 20-120; Na2O:SiO2 0.1-0.3. Hydrothermal crystallization is carried out at 413-373 K for 1-100 h. EFFECT: improved method of production. 2 cl, 1 tbl
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