Regularities of formation of LaCoO₃ oxide with a perovskite-type structure from precursors obtained by the citrate method and the original deposition method under conditions of mild hydrothermal synthesis using organic templates: ethylene glycol, D-glucose, D-galactose and D-fructose are considered. The proposed method of synthesis provides the necessary homogenization of cations in the resulting precursor compound and the homophasic nature of the oxide compound.