Tin(IV) sulfide is a compound with the
formula . The compound crystallizes in the
cadmium iodide
Cadmium iodide is the inorganic compound with the formula CdI2. It is a white hygroscopic solid. It also can be obtained as a mono- and tetrahydrate. It has few applications. It is notable for its crystal structure, which is typical for compound ...
motif, with the Sn(IV) situated in "octahedral holes' defined by six sulfide centers. It occurs naturally as the rare
mineral
In geology and mineralogy, a mineral or mineral species is, broadly speaking, a solid chemical compound with a fairly well-defined chemical composition and a specific crystal structure that occurs naturally in pure form.John P. Rafferty, ed. ...
berndtite. It is useful as
semiconductor
A semiconductor is a material which has an electrical conductivity value falling between that of a conductor, such as copper, and an insulator, such as glass. Its resistivity falls as its temperature rises; metals behave in the opposite way. ...
material with
band gap
In solid-state physics, a band gap, also called an energy gap, is an energy range in a solid where no electronic states can exist. In graphs of the electronic band structure of solids, the band gap generally refers to the energy difference ( ...
2.2 eV.
Reactions
The compound precipitates as a brown solid upon the addition of to solutions of tin(IV) species. This reaction is reversed at low
pH. Crystalline has a bronze color and is used in decorative coating
[Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. .] where it is known as
mosaic gold.
The material also reacts with sulfide salts to give a series of
thiostannates with the formula . A simplified equation for this depolymerization reaction is
: + → .
References
External links
Sulfides
Tin(IV) compounds
IV-VI semiconductors
Dichalcogenides
{{inorganic-compound-stub