In chemistry anantimonate is a compound which contains ametallic element,oxygen, andantimony in anoxidation state of +5. These compounds adopt polymeric structures with M-O-Sb linkages. They can be considered to be derivatives of the hypotheticalantimonic acid H₃SbO₄, or combinations ofmetal oxides andantimony 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 theSb(OH)⁻
₆ anion and that Na₂H₂Sb₂O₇·5H₂O is actually NaSb(OH)₆.^[1]

IUPAC recommendations are that compounds with anions containing antimony(V) have the antimonate(V) suffix or antimonate followed by a charge number, for example theSb(OH)⁻
₆ ion would be called hexahydridoxidoantimonate(V) or alternatively hexahydroxidoantimonate(1−).^[2]

Some examples of antimonates and their structures are shown below:

• Li₃SbO₄ has aNaCl superstructure with isolatedSb
  ₄O¹²⁻
  ₁₆ units.^[3]
• Sodium antimonate, NaSbO₃, has theilmenite structure, with hexagonal close packed oxide ions with each ion, Na⁺ and Sb⁵⁺ occupying a third of the octahedral sites.^[1]
• MgSb₂O₆ has the trirutile structure, which is similar to therutile structure except that there are two different cations in the lattice.^[1]
• AlSbO₄ has therutile structure with random occupancy.^[1]
• Lead antimonate, Pb₂Sb₂O₇,Naples yellow, has thepyrochlore structure.^[1]
• Calcium antimonate, Ca₂Sb₂O₇, has theweberite structure.^[1]
• Ferric ortho-antimonate, Fe₂O₃·Sb₂O₅ orFeSbO₄, has therutile structure with random occupancy.^[1]

• Antimonate mineral
• Antimonide
• Antimonite

• Antimony(V) compounds
• Pnictogen oxyanions
• Oxometallates
• Antimonates

• Articles with short description
• Short description matches Wikidata