Silicon dioxide

Silicon dioxide
	; Pure silicon dioxide
Names
	IUPAC name Silicon dioxide
	Ither names Quartz; Silica; Silicic oxide; Silicon(IV) oxide; Crystalline silica
Identifiers
CAS Nummer	7631-86-9 ;
3D model (JSmol)	Interactive eemage;
ChEBI	CHEBI:30563 ;
ChemSpider	22683 ;
EC Nummer	231-545-4
Gmelin Reference	200274
KEGG	C16459 ;
MeSH	Silicon+dioxide
PubChem CID	24261;
RTECS nummer	VV7565000
UNII	ETJ7Z6XBU4 ;
	InChI InChI=1S/O2Si/c1-3-2 Key: VYPSYNLAJGMNEJ-UHFFFAOYSA-N ;
	SMILES O=[Si]=O;
Properties
Chemical formula	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
Std enthalpy o; formation ΔfHo298	−911 kJ·mol−1
Hazards
Main hazards	Inhalation of dust is carcinogenic
NFPA 704	0 0 0
	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

Silicon dioxide, forby kent as silica (frae the Laitin silex), is a chemical compoond that is a dioxide o silicon wi the chemical formula Si O₂. 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

↑ ^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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[b1-1] Zumdahl, Steven S. (2009). Chemical Principles 6th Ed. Houghton Mifflin Company. p. A22. ISBN 0-618-94690-X.

[:0-2] Iler, R. K. (1979). The Chemistry of Silica. Plenum Press. ISBN 0-471-02404-X.

[2]

[1]

Names
Pure silicon dioxide

IUPAC name Silicon dioxide
Ither names Quartz Silica Silicic oxide Silicon(IV) oxide Crystalline silica
Identifiers
CAS Nummer	7631-86-9^Y
3D model (JSmol)	Interactive eemage
ChEBI	CHEBI:30563^Y
ChemSpider	22683^Y
EC Nummer	231-545-4
Gmelin Reference	200274
KEGG	C16459^N
MeSH	Silicon+dioxide
PubChem CID	24261
RTECS nummer	VV7565000
UNII	ETJ7Z6XBU4^Y
InChI InChI=1S/O2Si/c1-3-2^Y Key: VYPSYNLAJGMNEJ-UHFFFAOYSA-N^Y
SMILES O=[Si]=O
Properties
Chemical formula	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^o₂₉₈	42 J·mol⁻¹·K⁻¹^[1]
Std enthalpy o formation Δ_fH^o₂₉₈	−911 kJ·mol⁻¹^[1]
Hazards
Main hazards	Inhalation of dust is carcinogenic
NFPA 704	0 0 0
Except whaur itherwise notit, data are gien for materials in thair staundart state (at 25 °C [77 °F], 100 kPa).
Y verify (whit is ^YN ?)
Infobox references