Intermediate chlorides, bromides and iodides exist.
The previously reported GaBr and GaI produced from fusing gallium with the trihalide have been shown to be mixtures of metallic gallium with, respectively, Ga2Br3 and Ga2I3.
Gallium is very different from indium in that it is only known to form 6 coordinate complexes with the fluoride ion.
This can be rationalised by the smaller size of gallium (ionic radii of Ga(III) 62 pm, In(III) 80 pm).
Salts containing the Ga2Cl62− anion, where gallium has an oxidation state of +2, are known.