A fibrous blue or green mineral consisting of a silicate of iron and sodium. Also called blue asbestos.
- Most amphibole asbestos was mined as crocidolite and amosite from Precambrian banded ironstones in South Africa and, to a lesser extent, Western Australia.
- Both amosite and crocidolite, which typically contains well over 20% iron by weight, are biochemically reactive in the lung because of the catalytic effects of ferrous iron present on the fibre surface.
- Asbestos, a fibrous hydrous silicate mineral, exists in 6 forms for industrial use: actinolite, amosite, anthophyllite, chrysotile, crocidolite, and tremolite.
Mid 19th century: from Greek krokis, krokid- 'nap of cloth' + -lite.
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