Antimonate
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The antimonate ion is Sb(OH)6−, where Sb is antimony and (OH) is the hydroxyl group.
An antimonate (compound) refers to a compound that contains the antimonate ion.
See category for a list. Antimonate ions occur in some minerals (see category:Antimonate minerals).
In acid conditions this forms antimony pentoxide, Sb2O5; in other conditions we have the antimonate ion, Sb(OH)6−.
Like its horizontal neighbor in the periodic table, tellurium, and unlike other elements in the same group, antimony is commonly hexacoordinate, for example in the unit Sb(OH)6−; tetracoordinate units are not common.
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