|
gptkbp:instanceOf
|
gptkb:chemical_compound
|
|
gptkbp:appearance
|
white powder or colorless crystals
|
|
gptkbp:bandGap
|
8.9 eV (quartz)
|
|
gptkbp:boilingPoint
|
2230 °C
|
|
gptkbp:CASNumber
|
7631-86-9
|
|
gptkbp:category
|
gptkb:silicon_compounds
inorganic compounds
oxides
|
|
gptkbp:chemicalFormula
|
SiO2
|
|
gptkbp:component
|
minerals
rocks
earth's crust
|
|
gptkbp:crystalSystem
|
varies (quartz, cristobalite, tridymite, etc.)
|
|
gptkbp:density
|
2.648 g/cm³
|
|
gptkbp:E-number
|
gptkb:E551
|
|
gptkbp:event
|
found in quartz
found in sand
|
|
gptkbp:foundIn
|
gptkb:center
gptkb:stone
gptkb:coesite
gptkb:cristobalite
gptkb:stishovite
gptkb:tridymite
gptkb:diatomaceous_earth
granite
ode
flint
chalcedony
jasper
|
|
gptkbp:hardness
|
7 (Mohs scale, quartz)
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
Silicon dioxide
|
|
gptkbp:IUPACName
|
gptkb:silicon_dioxide
|
|
gptkbp:meltingPoint
|
1713 °C
|
|
gptkbp:molecularWeight
|
60.08 g/mol
|
|
gptkbp:otherName
|
gptkb:silica
|
|
gptkbp:refractiveIndex
|
1.458 (quartz)
|
|
gptkbp:solubility
|
insoluble
|
|
gptkbp:thermalConductivity
|
1.4 W/(m·K) (quartz)
|
|
gptkbp:toxicity
|
inhalation of fine particles can cause silicosis
|
|
gptkbp:uses
|
semiconductor manufacturing
Material
abrasives
glass making
food additive (anti-caking agent)
|
|
gptkbp:bfsParent
|
gptkb:Chalcedony
gptkb:Milky_quartz
gptkb:Lava
gptkb:Moss_agate
|
|
gptkbp:bfsLayer
|
5
|