In chemistry, the term stannate or tinnate refers to compounds of tin (Sn). Stannic acid (), the formal precursor to stannates, does not exist and is actually a hydrate of . 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 (e.g. ) or have a spinel structure (e.g. ) metastannates with a stoichiometry MII, M which may contain polymeric anions or may be sometimes better described as mixed oxides
These materials are semiconductors."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
Examples Barium stannate, (a metastannate) Cobalt stannate, , primary constituent of the pigment cerulean blue Dysprosium stannate, Lead stannate, , "Type I" lead-tin yellow Potassium stannate, formally potassium hexahydroxostannate(IV), formula Zinc Stannate, formula , used as a flame retardant additive for polymers. Sodium stannate, formally sodium hexahydroxostannate(IV), formula
See also Stannite Silicate
References