Tin(IV) sulfide

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Tin(IV) sulfide
Ball-and-stick model of tin(IV) sulfide
Identifiers
CAS number 1315-01-1 YesY
PubChem 73977 YesY, 15238661 (S=Sn=S) YesY
UNII YVY89V9BUH YesY
EC-number 215-252-9
ChEBI CHEBI:50886 YesY
Jmol-3D images Image 1
Image 2
Properties
Molecular formula S2Sn
Molar mass 182.84 g mol−1
Appearance Gold-yellow powder
Odor Odorless
Density 4.5 g/cm3[1]
Melting point 600 °C (1,112 °F; 873 K)
decomposes[1]
Solubility in water Insoluble
Solubility Soluble in aq. alkalis, decompose in aqua regia[1]
Insoluble in alkyl acetates, acetone[2]
Structure
Crystal structure Rhombohedral, hP3[3]
Space group P3m1, No. 164[3]
Point group 3 2/m[3]
Lattice constant a = 3.65 Å, c = 5.88 Å[3]
Lattice constant α = 90°, β = 90°, γ = 120°
Coordination
geometry
Octahedral (Sn4+)[3]
Hazards
GHS pictograms The exclamation-mark pictogram in the Globally Harmonized System of Classification and Labelling of Chemicals (GHS)[4]
GHS signal word Warning
GHS hazard statements H302, H312, H315, H319, H332, H335[4]
GHS precautionary statements P261, P280, P301+312, P302+352, P304+340, P305+351+338, P332+313[4]
NFPA 704
Flammability code 0: Will not burn. E.g., water Health code 1: Exposure would cause irritation but only minor residual injury. E.g., turpentine Reactivity code 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g., liquid nitrogen Special hazards (white): no codeNFPA 704 four-colored diamond
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Tin(IV) sulfide is a 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.[5] It occurs naturally as the rare mineral berndtite.[6] It is useful as semiconductor material with band gap 2.2 eV.

Reactions[edit]

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[7] 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[edit]

  1. ^ a b c Lide, David R., ed. (2009). CRC Handbook of Chemistry and Physics (90th ed.). Boca Raton, Florida: CRC Press. ISBN 978-1-4200-9084-0. 
  2. ^ Comey, Arthur Messinger; Hahn, Dorothy A. (1921-02). A Dictionary of Chemical Solubilities: Inorganic (2nd ed.). New York: The MacMillan Company. p. 1080.  Check date values in: |date= (help)
  3. ^ a b c d e Voort, G.F. Vander, ed. (2004). "Crystal Structure*". ASM Handbook 9 (Metallography and Microstructures). ASM International. pp. 29–43. doi:10.1361/asmhba0003722 (inactive 2014-07-13). 
  4. ^ a b c d "SDS of Stannic sulfide". https://www.pfaltzandbauer.com. Connecticut, USA: Pfaltz & Bauer, Inc. Retrieved 2014-07-13. 
  5. ^ Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.
  6. ^ Vaughan, D. J.; Craig, J. R. "Mineral Chemistry of Metal Sulfides" Cambridge University Press, Cambridge: 1978. ISBN 0-521-21489-0.
  7. ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.

External links[edit]