actinolite
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About Our Definitions: All forms of a word (noun, verb, etc.) are now displayed on one page.ac·tin·o·lite
noun \ak-ˈti-nə-ˌlīt\Definition of ACTINOLITE
: a bright green or grayish-green mineral of the amphibole group that is a silicate of calcium, magnesium, and iron occurring in fibrous, radiate, or columnar forms
First Known Use of ACTINOLITE
1794
actinolite
noun (Concise Encyclopedia)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.
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