The diatomic forms of salts like AlCl are completely unstable under normal terrestrial conditions. The
salt (bulk AlCl3) is used as a catalyst in
A variety of other diatomic and triatomic aluminum compounds have been detected in space,
including aluminum monofluoride, AlF,
aluminum isocyanide, AlNC,
aluminum monoxide, AlO, and
aluminum monohydroxide, AlOH.