Stannate
Ion / From Wikipedia, the free encyclopedia
In chemistry, the term stannate or tinnate refers to compounds of tin (Sn). Stannic acid (Sn(OH)4), the formal precursor to stannates, does not exist and is actually a hydrate of SnO2.[1] The term is also used in naming conventions as a suffix; for example the hexachlorostannate ion is SnCl2−
6.
In materials science, two kinds of tin oxyanions are distinguished:
- orthostannates contain discrete SnO4−
4 units (e.g. K4SnO4) or have a spinel structure (e.g. Mg2SnO4) - metastannates with a stoichiometry MIISnO3, MI
2SnO3 which may contain polymeric anions or may be sometimes better described as mixed oxides
These materials are semiconductors.[2]