FIELD: solid-phase synthesis of mixture for growing of single crystals of gallium-containing oxide compounds, more specifically, method of solid-phase synthesis of mixture for growing of single crystals of lanthanum-gallium niobate by Czochralski method. SUBSTANCE: method of solid-phase synthesis is realized by mixing of initial oxides of elements included into formula of single crystal of lanthanum-gallium niobate in ratio of La2O3: Ga2O3:Nb2O5=7.35:(7.77-7.79):1, subsequent heating them to synthesis temperature of 1410-1430 C and sintering for 6 h. EFFECT: produced in compact rational form (in form of shaped tables) of polycrystalline mixture for growing of single crystals of lanthanum-gallium niobate and reduced preliminary operations for its preparation to develop economically rational process of production of high-quality single crystals. 1 tbl
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