Silicon sulfide

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Silicon sulfide
Other names	silicon disulfide
Identifiers
CAS number	[13759-10-9]
Properties
Molecular formula	SiS2
Molar mass	92.218 g/mol
Appearance	white, grey, or brown needels rotten egg smell in moist air
Density	1.853 g/cm3
Solubility in water	decomposes
Structure
Crystal structure	orthorhombic, rhombohedral
Coordination geometry	tetrahedral
Related compounds
Other anions	silicon dioxide
Other cations	carbon disulfide germanium disulfide tin(IV) sulfide lead(IV) sulfide
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa) Infobox disclaimer and references

Silicon sulfide refers to the chemical compound with the formula SiS₂. This material is polymeric and adopts a structure quite different from the corresponding silicon dioxide polymorphs. The material consists of chains of edge-shared tetrahedra, Si(μ-S)₂Si(μS)₂ etc. The Si---Si distances at 214 picometers are shorter than conventional Si-Si single bonds.^[1]

The material is formed by heating silicon and sulfur or by the exchange reaction between SiO₂ and Al₂S₃. Like all silicon sulfur-compounds, SiS₂ hydrolyzes readily to release H₂S and form hydrated silica gel.

[edit] References

1. ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.

[edit] External links