Stannate
In chemistry, the term stannate or tinnate refers to compounds of tin. Stannic acid, the formal precursor to stannates, does not exist and is actually a hydrate of SnO2. The term is also used in naming conventions as a suffix; for example the hexachlorostannate ion is.
In materials science, two kinds of tin oxyanions are distinguished:
- orthostannates contain discrete units or have a spinel structure
- metastannates with a stoichiometry MIISnO3, MSnO3 which may contain polymeric anions or may be sometimes better described as mixed oxides
Examples
- Barium stannate, BaSnO3
- Cobalt stannate, Co2SnO4, primary constituent of the pigment cerulean blue
- Dysprosium stannate, Dy2Sn2O7
- Lead stannate, Pb2SnO4, "Type I" lead-tin yellow
- Potassium stannate, formally potassium hexahydroxostannate, formula K2Sn6
- Sodium stannate, formally sodium hexahydroxostannate, formula Na2Sn6