The Collaborative International Dictionary
Antimonite \An"ti*mo*nite`\, n.
(Chem.) A compound of antimonious acid and a base or basic radical.
(Min.) Stibnite.
Wiktionary
n. 1 (context mineral English) A grey mineral, antimony sulfide (Sb2S3) that is the main source of antimony; stibnite 2 (context countable inorganic chemistry English) Any of several oxyanions of antimony such as H2SbO3-; any salt containing this ion
Wikipedia
In chemistry, an antimonite refers to salts of antimony(III), such as NaSb(OH) and NaSbO (metaantimonite) which can be prepared by reacting alkali with antimony trioxide, SbO. These are formally salts of antimonous acid ( antimonious acid), "Sb(OH)" whose existence in solution is dubious, and attempts to isolate it generally form SbO·xHO, antimony(III) oxide hydrate, which slowly transforms into SbO.
In geology, the mineral stibnite, SbS, is sometimes called antimonite.
They can be compared to antimonates, which contain antimony in the +5 oxidation state.
Usage examples of "antimonite".
One gram of copper pyrites, blende, fahlerz, or mispickel, yields 7 or 8 grams of lead, whilst 1 gram of antimonite will give 6, and 1 gram of galena only a little over 3 grams.
Compounds such as antimonite which are soluble in hydrochloric should be dissolved at once in that acid.