Silica
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Silica
Silica (pronounced si-li-ca) is a chemical compound that is an oxide of silicon with the chemical formula SiO2. It is most commonly found in nature as quartz, and in various living organisms.
Etymology
The term "silica" comes from the Latin word 'silex' or 'silicis', meaning flint. The chemical suffix '-a' signifies that it is an oxide of silicon.
Related Terms
- Quartz: A hard, crystalline mineral composed of silica, found widely in igneous, metamorphic, and sedimentary rocks.
- Silicon: A hard, brittle crystalline solid with a blue-grey metallic lustre, and is a tetravalent metalloid and semiconductor.
- Silicon Dioxide: Another term for silica, especially when occurring in nature as quartz.
- Silicate: A salt in which the anion contains both silicon and oxygen, especially one of the anion SiO4.
- Silicosis: A form of occupational lung disease caused by inhalation of crystalline silica dust, and is marked by inflammation and scarring in the form of nodular lesions in the upper lobes of the lungs.
See Also
External links
- Medical encyclopedia article on Silica
- Wikipedia's article - Silica
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