Noun
Silicon dioxide, SiO/. It constitutes ordinary quartz (also opal and tridymite), and is artifically prepared as a very fine, white, tasteless, inodorous powder.
Source: Webster's dictionaryYet the stones remain less real to those who cannot name them, or read the mute syllables graven in silica. To see a red stone is less than seeing it as jasper metamorphic quartz, cousin to the flint the Kiowa carved as arrowheads. To name is to know and remember. Dana Gioia
About 6 miles (10 kilometers) below the surface, under incredible temperatures and pressures, the water carries high concentrations of carbon dioxide, silica, and gold. Source: Internet
Additionally, the cemented consistency depends on cementation by substances other than clay, such as calcium carbonate, silica, oxides and salts; moisture content has little effect on its assessment. Source: Internet
Addition of silica fume can yield exceptionally high strengths, and cements containing 5–20% silica fume are occasionally produced, with 10% being the maximum allowed addition under EN 197-1. Source: Internet
AuroShell particles (also known as "nanoshells") consist of a gold metal shell and a non-conducting silica core and serve as the exogenous absorber of the near-infrared laser energy delivered by the probe. Source: Internet
Bonding in ceramics and glasses uses covalent and ionic-covalent types with SiO 2 (silica or sand) as a fundamental building block. Source: Internet