Tin(IV) sulfide

Tin(IV) sulfide
Other names

tin disulfide, stannic sulfide,
mosaic gold
Identifiers
CAS number 1315-01-1 Y
Properties
Molecular formula SnS2
Molar mass 182.81 g/mol
Appearance gold-yellow odorless powder
Density 4.5 g/cm3, solid
Melting point

<680 °C
Solubility in water insoluble
Structure
Crystal structure Rhombohedral, hP3, SpaceGroup = P-3m1, No. 164
Coordination
geometry		 octahedral
Hazards
EU classification not listed
NFPA 704
0
1
0
 Y (verify) (what is: Y/N?)
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

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.[1] It occurs naturally as the rare mineral berndtite.[2]

The compound precipitates as a brown solid upon the addition of H2S to solutions of tin(IV) species. This reaction is reversed at low pH. Crystalline SnS2 has a bronze colour and is used in decorative coating[3] 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

  1. ^ Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.
  2. ^ Vaughan, D. J.; Craig, J. R. "Mineral Chemistry of Metal Sulfides" Cambridge University Press, Cambridge: 1978. ISBN 0521214890.
  3. ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.