silica

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sil·i·ca

 (sĭl′ĭ-kə)
n.
A white or colorless crystalline compound, SiO2, which in the form of quartz and certain other minerals is a chief component of the earth's crust. Silica sand is used in making a wide variety of materials, such as glass and concrete.

[New Latin, from Latin silex, silic-, hard stone, flint.]

silica

(ˈsɪlɪkə)
n
1. (Elements & Compounds) the dioxide of silicon, occurring naturally as quartz, cristobalite, and tridymite. It is a refractory insoluble material used in the manufacture of glass, ceramics, and abrasives
2. (Elements & Compounds) short for silica glass
[C19: New Latin, from Latin: silex]

sil•i•ca

(ˈsɪl ɪ kə)

n.
the dioxide form of silicon, SiO2, occurring esp. as quartz sand, flint, and agate: used chiefly in the manufacture of glass, water glass, ceramics, and abrasives.
[1795–1805; < New Latin, derivative of Latin silex hard stone, flint, boulder]

sil·i·ca

(sĭl′ĭ-kə)
Silicon dioxide, SiO2, a compound that occurs widely in rocks and mineral forms, such as quartz, sand, and flint, and is used to make glass, concrete, and other materials.

siliceous (sĭ-lĭsh′əs) adjective
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.silica - a white or colorless vitreous insoluble solid (SiO2)silica - a white or colorless vitreous insoluble solid (SiO2); various forms occur widely in the earth's crust as quartz or cristobalite or tridymite or lechatelierite
cristobalite - a white mineral consisting of silica; found in volcanic rocks
quartz - a hard glossy mineral consisting of silicon dioxide in crystal form; present in most rocks (especially sandstone and granite); yellow sand is quartz with iron oxide impurities
chert - variety of silica containing microcrystalline quartz
flint - a hard kind of stone; a form of silica more opaque than chalcedony
lechatelierite, quartz, quartz glass, vitreous silica, crystal - colorless glass made of almost pure silica
oxide - any compound of oxygen with another element or a radical
silex - a pure form of finely ground silica
tridymite - a mineral form of silica
Translations

silica

[ˈsɪlɪkə] Nsílice f

silica

[ˈsɪlɪkə] nsilice fsilica gel ngel m de silice

silica

nKieselerde f

silica

[ˈsɪlɪkə] nsilice f

silica

n sílice m
References in periodicals archive ?
As reported in The Journal of Physical Chemistry C, simulations were initially run to predict what happens when carbon dioxide collides with a cleaved quartz surface -- quartz (SiO2) being abundant in the earth's crust.
Stevanato Group, through Ompi, its specialist in glass primary packaging for the pharmaceutical industry, has signed a collaboration agreement with SiO2 Medical Products Inc, a United States based, privately-held company.
Several SiO2 experiments were designed and conducted, a light transmission coefficient and thickness were measured for each coating sample.
Al2O3, SiO2, CuCl, paraffin liquid and active carbon (denoted as AC) were all purchased from Tianjin Hengxing Chemical Reagent Co., Ltd, China.
Nanoparticles of SiO2 with an average primary particle size of 50 nm with a corresponding surface area ranged from 200-600 m2 g-1 were purchased from the Nanotechnology Unit, Beni-Sueif University, Egypt.
SiO2, Al2O3 and CaO increases in DWPS was 21%, 66%, and 100% increased as compared to the composition of WPS samples
In trade and Industry of disturbing factors of flotation, granular magnesium carbonate is used to produce concentrate magnesium carbonate along SiO2 with a volume less than 0.20 percent (Santana and Peres, 2001).
- Felicitas bauxite deposit upgrade to 218.7Mt @ 39.1% Total Al2O3 (30.1 % available @ 148AC), 8.9% SiO2 (1.9% reactive @148AC) (all grades are unbeneficiated).
The results indicate that SiO2 and Al2O3 are most abundant with dominance of quartz, feldspar and clay.
Louis with support from the McDonnell Center for the Space Sciences, have discovered two tiny grains of silica (SiO2; the most common constituent of sand) in primitive meteorites.
These are presented according to the papers published in the time sequence from 2004 to 2011 (ADJ in these equations refers to the adjusted data from SINCLAS (Verma et al, 2002) or IgAoCS' (Verma and Rivera-Gomez, 2013) computer program; the major oxide symbols refer to oxide concentrations in weight % or % m/m units, e.g., SIO2 stands for Si[O.sub.2] concentration, i.e., general names, rather than the standardised chemical symbols, were used in these equations; the symbol * is used to show the multiplication operation; function ln stands for natural logarithm; the subscripts m1, m2, t1, and t2 refer, respectively, to the first and second sets of major-element and trace- or immobile element based diagrams).
E3 (60 mg) was selected to further fractionated by column chromatography (2 g SiO2, 70-230 mesh; cyclohexane:EtOAc 90 : 10) to obtain 6 subfractions: Fr.