Antimonate
(Redirected from
Sodium antimonate
)In chemistry an antimonate is a compound which contains a
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.[1]
Some examples of antimonates and their structures are shown below:
- Li3SbO4 has a NaCl superstructure with isolated Sb
4O12−
16 units.[2] - Sodium antimonate, NaSbO3, has the ilmenite 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 the rutile structure except that there are two different cations in the lattice.[1]
- AlSbO4 has the rutile structure with random occupancy.[1]
- Lead antimonate, Pb2Sb2O7, Naples yellow, has the pyrochlore structure.[1]
- Calcium antimonate, Ca2Sb2O7, has the weberite structure.[1]
- Ferric ortho-antimonate, Fe2O3·Sb2O5 or
Antimonate in chemical nomenclature
IUPAC recommendations are that compounds with anions containing antimony(V) have the antimonate(V) suffix or antimonate followed by a charge number, for example the Sb(OH)−
6 ion would be called hexahydridoxidoantimonate(V) or alternatively hexahydroxidoantimonate(1−).[3]
See also
References
- ^ ISBN 0-19-855370-6
- ISBN 978-0-08-037941-8.
- ^ Nomenclature of Inorganic Chemistry—IUPAC Recommendations 2005 Red Book 2005.pdf