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actinolite
(redirected from Stibolita)

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actinolite (ăktĭn`əlīt): see amphibole amphibole , any of a group of widely distributed rock-forming minerals, magnesium-iron silicates, often with traces of calcium, aluminum, sodium, titanium, and other elements.
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actinolite

Colourless to green amphibole mineral, darkening with increased iron content from green to black. It has a prismatic and splintery texture and is abundant in regionally metamorphosed (see metamorphism) rocks such as schists. Actinolite has a monoclinic crystal structure, and it may alter to chlorite. See also asbestos.


actinolite [‚ak′tinĀ·ə‚līt]
(mineralogy)
Ca2(Mg,Fe)5Si8O22(OH)2A green, monoclinic rock-forming amphibole; a variety of asbestos occurring in needlelike crystals and in fibrous or columnar forms; specific gravity 3-3.2.


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