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Qué (quién) es vermiculite - definición
SMECTITE, PHYLLOSILICATE MINERAL
Zonolite; E561
![Vermiculite from Paakkila, [[Tuusniemi]], Eastern [[Finland]]](https://commons.wikimedia.org/wiki/Special:FilePath/Vermiculite-362652.jpg?width=200 "Vermiculite from Paakkila, [[Tuusniemi]], Eastern [[Finland]]")
Vermiculite
·noun A group of minerals having, a micaceous structure. They are hydrous silicates, derived generally from the alteration of some kind of mica. So called because the scales, when heated, open out into wormlike forms.
vermiculite
[v?'m?kj?l??t]
¦ noun a yellow or brown mineral found as an alteration product of mica and other minerals, used for thermal insulation or as a moisture-retentive medium for growing plants.
Origin
C19: from L. vermiculari 'be full of worms' (because on expansion due to heat, it shoots out forms resembling small worms) + -ite1.
Wikipedia
Vermiculite
Vermiculite is a hydrous phyllosilicate mineral which undergoes significant expansion when heated. Exfoliation occurs when the mineral is heated sufficiently, and commercial furnaces can routinely produce this effect. Vermiculite forms by the weathering or hydrothermal alteration of biotite or phlogopite. Large commercial vermiculite mines currently exist in the United States, Russia, South Africa, China, and Brazil.
Ejemplos de uso de vermiculite
1. Stringer had been the general manager of the vermiculite mine, which closed in 1''0.
2. They relied heavily on peat moss and either vermiculite or perlite.
3. In Libby, Mont., asbestos from Grace‘s former vermiculite mine has been blamed for sickening or killing hundreds of people.
4. The case pits Grace, which operated a vermiculite mine in Libby for 27 years, against the Environmental Protection Agency, which oversees the federal Superfund program for the nation‘s worst hazardous waste sites.
5. "People who have been injured by asbestos exposure will be fairly compensated while employees and shareholders retain control of a financially strong company." Grace and 61 subsidiaries filed for Chapter 11 bankruptcy protection in April 2001, following the filing of lawsuits over the operation of vermiculite mining and processing operations near Libby, Mont., from 1'63 to 1''0.