Indium monoiodide is a binary inorganic compound of indium metal and iodine with the chemical formula .
Preparation Indium(I) iodide can be obtained by reacting indium with iodine or indium(III) iodide in vacuum at 300 °C to 400 °C or with mercury(II) iodide at 350 °C.
Physical properties Indium(I) iodide forms a brown-red diamagnetic solid. Its melt is black. The compound has an orthorhombic crystal structure in the space group Cmcm (space group no. 63) with the lattice parameters a = 475 pm, b = 1276 pm, c = 491 pm.
Chemical properties Decomposes slowly with hot water:
Reacts with water in the presence of oxygen:
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