from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A white to dark gray amphibole mineral, Ca2Mg5Si8O22(OH)2, typically occurring in aggregates and used as a substitute for asbestos and in paints and ceramics.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A pale grey/green amphibole mineral that is a mixed calcium and magnesium silicate, with the chemical formula Ca2Mg5Si8O22(OH)2; sometimes used in place of asbestos.
from the GNU version of the Collaborative International Dictionary of English
- n. A white variety of amphibole, or hornblende, occurring in long, bladelike crystals, and coarsely fibrous masses.
from The Century Dictionary and Cyclopedia
- n. A variety of amphibole, having usually a white to gray color, and occurring in fibrous or columnar crystalline masses.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. a white or pale green mineral (calcium magnesium silicate) of the amphibole group used as a form of asbestos
Libby vermiculite is contaminated with an especially toxic form of naturally-occurring asbestos called tremolite-actinolite asbestiform mineral fibers.
Tightly bound chrysolite, amphibole and tremolite fibres are completely safe and their manufacture and export strictly controlled, in theory, under the Hazardous Products and Environmental Protection Acts.
The group published its findings and documented the appearance of small amounts of tremolite, a type of asbestos fiber, through testing by three separate laboratories.
The trend observed of increasing tensile strength of amphiboles from tremolite, to amosite, to crocidolite is directly related to the iron content of these fibers.
Overall, tremolite appears to exhibit the highest resistance to acid leaching.
Only three varieties of amphibole fibers will be discussed because: crocidolite and amosite were the only amphiboles with significant industrial uses in recent years; tremolite, although having essentially no industrial application, may be found as a contaminant in other fibers or in other industrial minerals (e.g., chrysotile and talc).
It doesn't take a sleuth to detect danger in these kits -- the fingerprinting dust contains tremolite, one of the most lethal forms of asbestos.
In India a total of 1,293 tons of chrysotile, 31,728 tons of tremolite and 275 tons of crocidolite were processed in the period between April
In particular, the minerals concerned are: chrysotile, amosite, crocidolite, anthophyllite, tremolite und actinolite, which are categorized on the basis of their chemical composition and fibrous structure as serpentine Asbestos
The groups which are typically developed comprise (1) slates, black schists and phyllites with thin black limestone, sometimes containing tremolite, (2) the main limestone, (3) the quartzite (Schiehallion).