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Encyclopedia > Silicon sulfide
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] This article does not cite its references or sources. ... Molar mass is the mass of one mole of a chemical element or chemical compound. ... CAS registry numbers are unique numerical identifiers for chemical compounds, polymers, biological sequences, mixtures and alloys. ... The coordination geometry of an atom is the geometrical pattern formed by its neighbors in a molecule or a crystal. ... A tetrahedron (plural: tetrahedra) is a polyhedron composed of four triangular faces, three of which meet at each vertex. ... Enargite crystals In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ... In crystallography, the orthorhombic crystal system is one of the 7 lattice point groups. ... In crystallography, the rhombohedral (or trigonal) crystal system is one of the 7 lattice point groups. ... In physics, density is mass m per unit volume V. For the common case of a homogeneous substance, it is expressed as: where, in SI units: ρ (rho) is the density of the substance, measured in kg·m-3 m is the mass of the substance, measured in kg V is... In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... It has been suggested that this article or section be merged with Solution. ... Impact of a drop of water creating circular capillary waves. ... Ethanol, also known as ethyl alcohol, drinking alcohol or grain alcohol, is a flammable, colorless, slightly toxic chemical compound with a distinctive perfume-like odor, and is the alcohol found in alcoholic beverages. ... Benzene, also known as benzol, is an organic chemical compound with the formula C6H6. ... The boiling point of a substance is the temperature at which it can change its state from a liquid to a gas throughout the bulk of the liquid at a given pressure. ... Council Directive 67/548/EEC of 27 June 1967 on the approximation of laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances (as amended) is the main source of European Union law concerning chemical safety. ... NFPA 704 is a standard maintained by the U.S. National Fire Protection Association. ... “Multivalent” redirects here. ... R-phrases R42 R43 R49 S-phrases S22 S36 S37 S45 S53 Flash point non-flammable Supplementary data page Structure and properties n, εr, etc. ... “Multivalent” redirects here. ... Carbon disulfide is a colorless liquid with the formula CS2. ... Tin(IV) sulfide (SnS2) is a chemical compound. ... Lead(IV) sulfide is a chemical compound with the formula PbS2. ... In chemistry, the standard state of a material is its state at 1 bar (100 kilopascals) and 25 degrees Celsius (298. ... A chemical compound is a chemical substance consisting of two or more different chemically bonded chemical elements, with a fixed ratio determining the composition. ... It has been suggested that Silicons ranking be merged into this article or section. ... General Name, Symbol, Number sulfur, S, 16 Chemical series nonmetals Group, Period, Block 16, 3, p Appearance lemon yellow Standard atomic weight 32. ... Polymorphism in materials science is the ability of a solid material to exist in more than one form or crystal structure. ... A tetrahedron (plural: tetrahedra) is a polyhedron composed of four triangular faces, three of which meet at each vertex. ... Picometre (American spelling: picometer) is an SI measure of length that is equal to 10−12 of a metre. ... Covalently bonded hydrogen and carbon in a molecule of methane. ...


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.


References

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

External links

  • Links to external chemical sources

 
 

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