Silicon dioxide
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Silicon dioxide, forby kent as silica (frae the Laitin silex), is a chemical compoond that is a dioxide o silicon wi the chemical formula SiO2. It haes been kent syne auncient times. Silica is maist commonly foond in naitur as quartz, as well as in various livin organisms,[2] Silica is ane o the maist complex an maist abundant faimilies o materials, existin baith as several minerals an bein produced synthetically. Notable ensaumples include fused quartz, crystal, fumed silica, silica gel, an aerogels. Applications range frae structural materials tae microelectronics tae compone[2]nts uised in the fuid industry.
Pure silicon dioxide
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Names | |
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IUPAC name
Silicon dioxide
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Ither names
Quartz
Silica | |
Identifiers | |
3D model (JSmol)
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ChEBI | |
ChemSpider | |
EC Nummer | 231-545-4 |
Gmelin Reference | 200274 |
KEGG | |
MeSH | Silicon+dioxide |
PubChem CID
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RTECS nummer | VV7565000 |
UNII | |
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Properties | |
SiO2 | |
Molar mass | 60.08 g/mol |
Appearance | Transparent crystals |
Density | 2.648 g·cm−3 |
Bylin pynt | 2,230 °C (4,050 °F; 2,500 K) |
Relatit compoonds | |
Thermochemistry | |
Staundart molar entropy S |
42 J·mol−1·K−1[1] |
Std enthalpy o formation ΔfH |
−911 kJ·mol−1[1] |
Hazards | |
Main hazards | Inhalation of dust is carcinogenic |
NFPA 704 | |
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa). | |
verify (whit is ?) | |
Infobox references | |
References
eedit- ↑ a b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A22. ISBN 0-618-94690-X.
- ↑ a b Iler, R. K. (1979). The Chemistry of Silica. Plenum Press. ISBN 0-471-02404-X.
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