Silicon sulfide
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| Silicon sulfide | |
|---|---|
| Image:Silicon sulfide.jpg | |
| General | |
| Other names | silicon disulfide |
| Molecular formula | SiS2 |
| Molar mass | 92.218 g/mol |
| Appearance | white, grey, or brown needels rotten egg smell in moist air |
| CAS number | [13759-10-9] |
| Structure | |
| Coordination geometry |
tetrahedral |
| Crystal structure | orthorhombic, rhombohedral |
| Properties | |
| Density and phase | 1.853 g/cm3, solid |
| Solubility in water, ethanol, benzene |
decomposes |
| Boiling point | 1090 °C (1360 K) sublimes |
| Hazards | |
| EU classification | not listed |
| NFPA 704| | |
| 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
- ^ Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.
[edit] External links
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