Gallium(III) iodide is the inorganic compound with the formula GaI3.
A yellow hygroscopic solid, it is the most common iodide of gallium.
[3] In the chemical vapor transport method of growing crystals of gallium arsenide uses iodine as the transport agent.
In the solid state, it exists as the dimer Ga2I6, with a diborane structure.
[4] When vaporized, its forms GaI3 molecules of D3h symmetry where the Ga–I distance is 2.458 Angstroms.