Stannate

In chemistry the term stannate 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. The term is also used in naming conventions as a suffix for example the hexachlorostannate ion is SnCl₆²⁻.

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 M^IISnO₃, MI
  2SnO₃ which may contain polymeric anions or may be sometimes better described as mixed oxides

These materials are semiconductors.^[1]

See also

• Stannite

References

1. "Preparation, characterization and structure of metal stannates: a new family of photocatalysts for organic pollutants degradation." Handbook of Photocatalysts (2010), pp. 493–510. Nova Science Publishers, Inc., Hauppauge, NY