Assertion: silica | /r/HasProperty | sio
Facets:
Source sentences:
text: Siliceous rock, any of a group of sedimentary rocks that consist largely or almost entirely of silicon dioxide (SiO 2 ), either as quartz or as amorphous silica and cristobalite; included are rocks that have formed as chemical precipitates and excluded are those of detrital or fragmental origin.
text: Silica (SiO 2) occurs commonly in nature as sandstone, silica sand or quartzite.
text: Silica in the form of silicon dioxide (SiO 2 ) is the most abundant compound in the earth’s crust.
text: Also called silica sand or quartz sand, silica is silicon dioxide (SiO 2 ).
text: Also called silica sand or quartz sand, silica is made of silicon dioxide (SiO 2 ).
text: In 1955, Carl Frosch and Lincoln Derick at Bell Labs accidentally discovered that silicon dioxide (SiO 2 ) could be grown on silicon, and they later proposed this could mask silicon surfaces during diffusion processes in 1958.
text: Like its neighbour aluminium, silicon forms a thin, continuous surface layer of silicon dioxide (SiO 2 ) that protects the metal from oxidation.
text: Silicon dioxide (SiO 2 ), also known as silica, is one of the best-studied compounds, second only to water.
text: It is silicon dioxide (SiO 2 ).
text: Silicon dioxide (SiO 2 ) is a common fundamental constituent of glass.
text: Silicon dioxide (SiO 2 ), also known as silica, is a natural compound made of two of the earth’s most abundant materials: silicon (Si) and oxygen (O 2 ).
text: Crystalline silica (or silicon dioxide, SiO 2 ) is a mineral that is naturally found in the Earth’s crust and whose three main forms are quartz, cristobalite and tridymite.
text: Depending upon the source and composition of the coal being burned, the components of fly ash vary considerably, but all fly ash includes substantial amounts of silicon dioxide (SiO 2 ) (both amorphous and crystalline), aluminium oxide (Al 2 O 3 ) and calcium oxide (CaO), the main mineral compounds in coal-bearing rock strata.
text: The compound silica, also known as silicon dioxide (SiO 2 ), is formed from silicon and oxygen atoms.
text: Quartz is the mineral form of silicon dioxide (SiO 2 ).
text: Crystal structure Micas have sheet structures whose basic units consist of two polymerized sheets of silica (SiO 4 ) tetrahedrons.
text: Precipitated silica is an amorphous form of silica (silicon dioxide, SiO 2 ); it is a white, powdery material.
text: The minerals quartz, cristobalite and tridymite are different forms of crystalline silica (silica is silicon dioxide or SiO 2 ); they are crystalline silica polymorphs.
text: Silicon dioxide is known as silica, chemical formula SiO 2 .
text: Characteristic of borosilicate glasses is the presence of substantial amounts of silica (SiO 2 ) and boric oxide (B 2 O 3 , >8%) as glass network formers.
text: Silica (SiO 2 ) sand is the sand found on a beach and is also the most commonly used sand.
text: Pure silicon is too reactive to be found in nature, but it is found in practically all rocks as well as in sand, clays, and soils, combined either with oxygen as silica (SiO 2 , silicon dioxide) or with oxygen and other elements (e.g., aluminum, magnesium, calcium, sodium, potassium, or iron) as silicates.
text: Elemental silicon is produced commercially by the reduction of silica (SiO 2 ) with coke in an electric furnace, and the impure product is then refined.
text: Indeed, human tissue often contains 6 to 90 milligrams of silica (SiO 2 ) per 100 grams dry weight, and many plants and lower forms of life assimilate silica and use it in their structures.
text: Opal is a hydrated amorphous form of silica (SiO 2 ·nH 2 O); its water content may range from 3 to 21% by weight, but is usually between 6 and 10%.
text: Silica (SiO 2 ) is a compound resulting from the combination of one atom of silicon with two atoms of oxygen.