Silikon dioksida: Perbedaan antara revisi
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{{Chembox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 476993639
| Name =
| ImageFile =
| ImageFile1 = Sample of silicon dioxide.jpg
| ImageCaption1 =
| ImageFile1_Ref = {{Chemboximage|correct|??}}
| ImageNameR1 = A sample of silicon dioxide as sand in a dune
| ImageCaptionR1 = Silicon dioxide as sand
| IUPACName = Silicon dioxide
| OtherNames = Quartz<br />
Silica<br />
Silicic oxide<br />
Silicon(IV) oxide<br />
Crystalline silica<br />
Pure Silica<br />
Silicea
| SystematicName =
| Section1 = {{Chembox Identifiers
| CASNo = 7631-86-9
| CASNo_Ref = {{cascite|correct|CAS}}
| PubChem = 24261
| ChemSpiderID = 22683
| ChemSpiderID_Ref = {{chemspidercite|correct|chemspider}}
| UNII = ETJ7Z6XBU4
| UNII_Ref = {{fdacite|correct|FDA}}
| EINECS = 231-545-4
| KEGG = C16459
| KEGG_Ref = {{keggcite|changed|kegg}}
| MeSHName = Silicon+dioxide
| ChEBI_Ref = {{ebicite|correct|EBI}}
| ChEBI = 30563
| RTECS = VV7565000
| Gmelin = 200274
| SMILES =
| StdInChI = 1S/O2Si/c1-3-2
| StdInChI_Ref = {{stdinchicite|correct|chemspider}}
| StdInChIKey = VYPSYNLAJGMNEJ-UHFFFAOYSA-N
| StdInChIKey_Ref = {{stdinchicite|correct|chemspider}}
}}
| Section2 = {{Chembox Properties
| Formula =SiO<sub>2</sub>
| MolarMass = 60.08 g/mol
| Appearance = Transparent solid (Amorphous) White/Whitish Yellow (Powder/Sand)
| Density = 2.648 (α-quartz), 2.196 (amorphous) g·cm<sup>−3</sup><ref name=b92>{{RubberBible92nd}}</ref>
| MeltingPt = 1,713 °C (3,115 °F; 1,986 K) (amorphous)<ref name=b92/>{{rp|page=4.88}} to | BoilingPt = 2,950 °C (5,340 °F; 3,220 K)<ref name=b92/>
| Solubility =
| RefractIndex = 1.544 ([[Birefringence|o]]), 1.553 (e)<ref name=b92/>{{rp|page=4.143}}
| ThermalConductivity = 12 (<nowiki>||</nowiki> c-axis), 6.8 (⊥ c-axis), 1.4 (am.) W/(m⋅K)<ref name=b92/>{{rp|page=12.213}}
| MagSus = −29.6·10<sup>−6</sup> cm<sup>3</sup>/mol
}}
| Section3 = {{Chembox Hazards
| MainHazards =
| NFPA-H = 0
| NFPA-F = 0
| NFPA-R = 0
| IDLH = 3000 mg/m<sup>3</sup> (amorphous)<ref name=PGCH0552>{{PGCH|0552}}</ref><br/>Ca [25 mg/m<sup>3</sup> (cristobalite, tridymite); 50 mg/m<sup>3</sup> (quartz)]<ref name=PGCH0682>{{PGCH|0682}}</ref>
| REL = TWA 6 mg/m<sup>3</sup> (amorphous)<ref name=PGCH0552/><br/>Ca TWA 0.05 mg/m<sup>3</sup><ref name=PGCH0682/>
| PEL = TWA 20 mppcf (80 mg/m<sup>3</sup>/%SiO<sub>2</sub>) (amorphous)<ref name=PGCH0552/>
}}
| Section4 = {{Chembox Related
| OtherFunction_label = diones
| OtherFunction = [[Carbon dioxide]]<br />
[[Germanium dioxide]]<br />
[[Tin dioxide]]<br />
[[Lead dioxide]]
| OtherCompounds = [[Silicon monoxide]]<br />
[[Silicon sulfide]]
}}
| Section5 = {{Chembox Thermochemistry
| DeltaHf = −911 kJ·mol<sup>−1</sup><ref name=b1>{{cite book| author = Zumdahl, Steven S.|title =Chemical Principles 6th Ed.| publisher = Houghton Mifflin Company| year = 2009| isbn = 0-618-94690-X|page=A22}}</ref>
| Entropy = 42 J·mol<sup>−1</sup>·K<sup>−1</sup><ref name=b1/>
}}
| Section6 =
}}
'''Silikon dioksida''', juga dikenal sebagai silika (dari silex Latin), adalah oksida silicon dengan rumus kimia SiO2 yang telah dikenal sejak zaman dahulu karena kekerasannya. Silika ini paling sering ditemukan di alam sebagai pasir atau kuarsa, serta di dinding sel diatom.
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