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Boundary conditions and ranges of the formation of indium(III) sulfide and selenide upon pre cipitation by thiocarbamide and selenocarbamide are determined. Potentiometric titration of indium chlo ride (InCl 3) in the concentration range of 0.0001 to 0.100 mol/L by a solution of sodium hydroxide is per formed. It is found that the following pH ranges are optimal for In 2 S 3 and In 2 Se 3 film precipitation: from 3.0 to 4.5 and from 9.0 to 14.0. Indium selenide layers 100 to 300 nm thick are prepared on vitroceramic by hydrochemcial precipitation.

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