Tin(IV) sulfide

Chembox new
Name = Tin(IV) sulfide
ImageFile = Cadmium-iodide-3D-layers.png ImageSize = 140px
ImageName = Tin(IV) sulfide
OtherNames = tin disulfide, stannic sulfide,
mosaic gold
Section1 = Chembox Identifiers
CASNo = 1315-01-1
Section2 = Chembox Properties
Formula = SnS₂
MolarMass = 182.81 g/mol
Appearance = gold-yellow odorless powder
Density = 4.5 g/cm³, solid
Solubility = insoluble
MeltingPt =<680 °C
Section7 = Chembox Hazards
EUClass = not listed
NFPA-H = 1
NFPA-R = 0
NFPA-F = 0

Tin(IV) sulfide is a chemical compound with the formula SnS₂. The compound crystallizes in the cadmium iodide motif, with the Sn(IV) situated in "octahedral holes' defined by six sulfide centers. [Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.] It occurs naturally as the rare mineral berndtite. [Vaughan, D. J.; Craig, J. R. "Mineral Chemistry of Metal Sulfides" Cambridge University Press, Cambridge: 1978. ISBN 0521214890.]

The compound precipitates as a brown solid upon the addition of H₂S to solutions of tin(IV) species. This reaction is reverses at low pH. Crystalline SnS₂ has a bronze colour and is used in decorative coating [Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.] where it is known as mosaic gold.

The material also reacts with sulfide salts to give a series of thiostannates with the formula [SnS₂] _m [S] _n²ⁿ⁻. A simplified equation for this depolymerization reaction is:SnS₂ + S²⁻ → 1/x{SnS₃²⁻}_x.

References