Antimonate

In chemistry an antimonate is a compound which contains a metallic element, oxygen and antimony in an oxidation state of +5. These compounds can be considered to be salts of the hypothetical antimonic acid H₃SbO₄, or combinations of metal oxides and antimony pentoxide, Sb₂O₅. Historically these compounds were assumed to be analogous to the phosphates and formulas such as LiSbO₃·3H₂O and Na₂H₂Sb₂O₇·5H₂O were used and the compounds described as hydrated meta-antimonates and pyro-antimonates. LiSbO₃·3H₂O is now known to be LiSb(OH)₆ and contain the Sb(OH)−
6 anion and that Na₂H₂Sb₂O₇·5H₂O is actually NaSb(OH)₆.