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Silicon dioxide

Frae Wikipedia, the free beuk o knawledge
Silicon dioxide

Pure silicon dioxide
Names
IUPAC name
Silicon dioxide
Ither names
Quartz

Silica
Silicic oxide
Silicon(IV) oxide

Crystalline silica
Identifiers
3D model (JSmol)
ChEBI
ChemSpider
EC Nummer 231-545-4
Gmelin Reference 200274
KEGG
MeSH Silicon+dioxide
RTECS nummer VV7565000
UNII
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
So298
42 J·mol−1·K−1[1]
Std enthalpy o
formation
ΔfHo298
−911 kJ·mol−1[1]
Hazards
Main hazards Inhalation of dust is carcinogenic
NFPA 704
NFPA 704 four-colored diamondFlammability code 0: Will nae burn. E.g., watterHealth code 0: Exposur unner fire condeetions would offer no hazard beyond that o ordinary combustible material. E.g., sodium chlorideReactivity code 0: Normally stable, even unner fire exposur condeetions, an is nae reactive wi watter. E.g., liquid nitrogenSpecial hazards (white): no code
0
0
0
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
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Infobox references

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.

References

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  1. a b Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A22. ISBN 0-618-94690-X.
  2. a b Iler, R. K. (1979). The Chemistry of Silica. Plenum Press. ISBN 0-471-02404-X.