- Silicon sulfide
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OtherNames = silicon disulfide
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CASNo = 13759-10-9
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Section2 = Chembox Properties
Formula = SiS2
MolarMass = 92.218 g/mol
Appearance = white, grey, or brown needels rotten egg smell in moist air
Density = 1.853 g/cm3
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Boiling_notes = 1090 °C (1360 K) sublimes
Solubility = decomposes
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Section3 = Chembox Structure
CrystalStruct =orthorhombic ,rhombohedral
Coordination =tetrahedral
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Section6 = Chembox Explosive
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Section8 = Chembox Related
OtherAnions =silicon dioxide
OtherCations =carbon disulfide germanium disulfide tin(IV) sulfide lead(IV) sulfide
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OtherCpds =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-sharedtetrahedra , Si(μ-S)2Si(μS)2 etc. The Si---Si distances at 214picometer s are shorter than conventional Si-Sisingle bond s. [Holleman, A. F.; Wiberg, E. "Inorganic Chemistry" Academic Press: San Diego, 2001. ISBN 0-12-352651-5.]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.
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