chrysotile


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chrysotile:

see serpentineserpentine
, hydrous silicate of magnesium. It occurs in crystalline form only as a pseudomorph having the form of some other mineral and is generally found in the form of chrysotile (silky fibers) and antigorite and lizardite (which are both tabular).
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chrysotile

[′kris·ō‚tīl]
(mineralogy)
Mg3Si2O5(OH)4 A fibrous form of serpentine that constitutes one type of asbestos.
References in periodicals archive ?
This interdisciplinary center is evaluating the health effects associated with chrysotile found at the Ambler, Pennsylvania, Superfund site (U.
Even if this contention were supported by the evidence, which it is not, it has no bearing on the logic of Annex III of Rotterdam which is that countries, to which Russia and Kazakhstan hope to export their chrysotile, should have the right to give or refrain from giving prior informed consent.
For surface wipe samples, in terms of individual asbestos structure counts reported by the laboratory, 585 structures were chrysotile (Figure 3).
It would be hypocritical for us to claim victory for saving lives of workers in countries that imported Canadian chrysotile while ignoring the plight of the workers of Quebec mining towns.
In 2011, a campaigning Prime Minister Stephen Harper took the position that Canada is only one of several exporters of chrysotile, which remains a legal building material in many countries.
In contrast, the current analysis included 163 patients with asbestosis and 86 with DPF and examined the relationship between fibrosis and 8 different parameters: total (coated plus uncoated) commercial amphibole fibers, uncoated commercial amphibole fibers, coated commercial amphibole fibers, total uncoated fibers, asbestos bodies (light microscopy), noncommercial amphibole fibers, chrysotile fibers, and nonasbestos mineral fibers.
Chrysotile fibers consist of long, thin, flexible fibrils that resemble scrolls or cylinders.
As expected, the tubular chrysotile behaviour is similar to the behaviour of brucite since the magnesia octahedral layer of chrysotile is exposed.
Today, there are only two companies (three producing mines) in the Quebec towns of Thetford and Asbestos still mining chrysotile asbestos in Canada.
Forensic testing has revealed that parts contain a concentration of chrysotile asbestos about 93,000 times higher than the average found in the environment.
Fibrous hydrated magnesium silicate or chrysotile is the most common form of asbestos and belongs to the serpentines.
And white asbestos, or chrysotile, was outlawed just two years ago.