Solvothermal Synthesis of Gallium and Indium Nitrides Using Lithium Amide

Results of the investigation of the reactions of GaCl3, InCl3 and InI3 with LiNH2 under solvothermal conditions in benzene, which lead to metal nitrides, are reported. GaN is obtained as a cubic phase or as a mixture of cubic and hexagonal phases, depending on temperature. The effect of the addition of surfactants on the formation of GaN was explored. InN products were always contaminated with indium metal, even at low reaction temperatures. The addition of excess LiNH2 or the use of InI3 instead of InCl3 gave products with less In metal.