Silicon sulfide
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| Names | |
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| IUPAC name
silicon(IV) sulfide
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| Other names
silicon disulfide
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| Identifiers | |
13759-10-9  |
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| ChemSpider | 75527  |
| Jmol 3D model | Interactive image |
| PubChem | 83705 |
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| Properties | |
| SiS2 | |
| Molar mass | 92.218 g/mol |
| Appearance | White (samples are sometimes grey or brown) needles. Rotten egg smell in moist air. |
| Density | 1.853 g/cm3 |
| Melting point | 1,090 °C (1,990 °F; 1,360 K) sublimes |
| Decomposes | |
| Structure | |
| Orthorhombic, oI12 | |
| Ibam, No.72[1] | |
| Tetrahedral | |
| Vapor pressure | {{{value}}} |
| Related compounds | |
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Other anions
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silicon dioxide |
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Other cations
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carbon disulfide germanium disulfide tin(IV) sulfide lead(IV) sulfide |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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 verify (what is ?) |
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| Infobox references | |
Silicon sulfide is the inorganic compound with the formula SiS2. Like the silicon dioxide, this material is polymeric, but it adopts a 1-dimensional structure quite different from the usual forms of SiO2.
Synthesis, structure, and properties
The material is formed by heating silicon and sulfur or by the exchange reaction between SiO2 and Al2S3. The material consists of chains of edge-shared tetrahedra, Si(μ-S)2Si(μS)2, etc.[2]
Like other silicon sulfur-compounds (e.g., bis(trimethylsilyl)sulfide) SiS2 hydrolyzes readily to release H2S. In liquid ammonia it is reported to form the imide Si(NH)2 and NH4SH,[3] but a recent report has identified crystalline (NH4)2[SiS3(NH3)]·2NH3 as a product which contains the tetrahedral thiosilicate anion, SiS3(NH3).[4]
Reaction with ethanol gives the alkoxide, tetraethyl orthosilicate and H2S.[3] Reaction with sodium sulfide, magnesium sulfide and aluminum sulfide give thiosilicates.[3]
SiS2 is claimed to occur in certain interstellar objects.[5]
References
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found. A printing error in this book states that rSiSi is 214 picometers, when in fact that distance describes rSiS.
- ↑ 3.0 3.1 3.2 Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
- ↑ Lua error in package.lua at line 80: module 'strict' not found.
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