Gallium(III) iodide

Gallium(III) iodide is the chemical compound with the formula Ga₂I₆. It is the most common iodide of gallium. In the chemical vapor transport method of growing crystals of gallium arsenide uses iodine as the transport agent. It reversibly forms GaI3.^[1]

Gallium triiodide can be reduced with gallium metal to give a green-colored solid called “gallium(I) iodide.” The nature of this species is unclear, but it is useful for the preparation of compounds of gallium(I) and galium(II).^[2]