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actinolite

[ ak-tin-l-ahyt, ak-tuh-nl- ]

noun

, Mineralogy.
  1. a variety of amphibole, occurring in greenish bladed crystals or in masses.


actinolite

/ ækˈtɪnəˌlaɪt /

noun

  1. a green mineral of the amphibole group consisting of calcium magnesium iron silicate. Formula: Ca 2 (Mg,Fe) 5 Si 8 O 22 (OH) 2
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

actinolite

/ ăk-tĭnə-līt′ /

  1. A greenish variety of amphibole. Actinolite is a monoclinic mineral, and occurs in long, slender, green needlelike crystals, or in fibrous, radiated forms in metamorphic rocks. Chemical formula: Ca 2 (Mg,Fe) 5 Si 8 O 22 OH 2 .
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Other Words From

  • ac·tin·o·lit·ic [ak-tin-l-, it, -ik, ak-t, uh, -nl-], adjective
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Word History and Origins

Origin of actinolite1

First recorded in 1825–35; actino- + -lite
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Word History and Origins

Origin of actinolite1

C19: from actino- (from the radiating crystals in some forms) + -lite
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Example Sentences

J&J didn’t tell the FDA about a 1974 test by a professor at Dartmouth College in New Hampshire that turned up asbestos in talc from J&J – “fiberform” actinolite, as he put it.

From Reuters

In its March 2013 final report, the EPA said it found actinolite asbestos along a road cut on the northeastern side of Burlington Hill.

The actinolite slate is dark green, and formed by an almost insensible gradation from the mica slate.

Some authors believe that the development of saussurite from felspar is also dependent on pressure rather than on weathering, and an analogous change may affect the olivine, replacing it by talc, chlorite, actinolite and garnet.

His bathroom walls were slabs of glossy actinolite, inlaid with cinnabar, jade, galena, pyrite and blue malachite, in representations of fantastic birds.

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actinoidactinology