Note 31 — Chapter XVII · BORON, ALUMINIUM, AND THE ANALOGOUS METALS OF THE THIRD GROUP

In the case of gallium, as a close analogue of aluminium, Lecoq de Boisbaudran (1880) showed that probably the molecule gallium chloride contains Ga2Cl6 at low temperatures and high pressures, and that it dissociates into GaCl3 at high temperatures and low pressures. The molecule of indium chloride seems to exist only in the simplest form, InCl3.