Antimonite

In chemistry, an antimonite refers to salts of antimony(III), such as NaSb(OH)₄ and NaSbO₂ (metaantimonite) which can be prepared by reacting alkali with antimony trioxide, Sb₂O₃. These are formally salts of antimonous acid (antimonious acid), "hc(OH)₃" whose existence in solution is dubious, and attempts to isolate it generally form Sb₂O₃·xH₂O, antimony(III) oxide hydrate, which slowly transforms into Sb₂O₃.

In geology, the mineral stibnite, Sb₂S₃, is sometimas called atimonite.

They can be compared to antimonates, which contain antimony in the +5 oxidation state.