amphibole - Hutchinson encyclopedia article about amphibole Printer Friendly
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amphibole

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amphibole

Any one of a large group of rock-forming silicate minerals with an internal structure based on double chains of silicon and oxygen, and with a general formula X2Y5Si8O22 (OH)2; closely related to pyroxene. Amphiboles form orthorhombic, monoclinic, and triclinic crystals.

Amphiboles occur in a wide range of igneous and metamorphic rocks. Common examples are hornblende (X = Ca, Y = Mg, Fe, Al) and tremolite (X = Ca, Y = Mg).


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? Mentioned in ? References in periodicals archive
 
The amphibole asbestos has different physical and chemical properties from chrysotile, states a Natural Resources Canada (NRCan) report.
The most common form of asbestos used commercially, chrysotile, is generally considered to be less dangerous than the amphiboles.
They reveal that the workers who developed these cancers were also exposed to other carcinogens, most notably cigarette smoke and several of the amphiboles.
 
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