actinolite

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Related to actinolite: epidote, tremolite

ac·tin·o·lite

(ăk-tĭn′ə-līt′)

A greenish amphibole mineral, Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂, that occurs in several forms, including a fibrous form that is a variety of asbestos.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

actinolite

(ækˈtɪnəˌlaɪt)

(Minerals) a green mineral of the amphibole group consisting of calcium magnesium iron silicate. Formula: Ca2(Mg,Fe)5Si8O22(OH)2

[C19: from actino- (from the radiating crystals in some forms) + -lite]

Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014

ac•tin•o•lite

(ækˈtɪn lˌaɪt)

n.

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

[1825–35]

ac•tin`o•lit′ic (-ˈɪt ɪk) adj.

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Noun

actinolite - a green mineral of the amphibole group; calcium magnesium iron silicate

amphibole - a mineral or mineral variety belonging to the amphibole group

amphibole group - a group of minerals with similar crystal structures containing a silicate chain and combinations of chiefly sodium and calcium and magnesium and iron and aluminum

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References in periodicals archive ?

Samples include magnetite-quartz-chalcopyrite veins and semi-massive sulfide pods associated with chlorite, epidote, actinolite and K-feldspar alteration.

Arcwest Exploration Inc. Provides Exploration Update on its Eagle and Sparrowhawk Porphyry Projects, Central B.C. and Stakes Newly Discovered Porphyry Copper Prospect

Different amphiboles have been found in southern Finland (pargasite, potassium pargasite, Fe-hornblende and actinolite), but their lattice parameters differ from those of Lemme amphiboles.

Provenance of heavy minerals in the Quaternary deposits of the Lemme outcrop, Estonia, based on optical microscopy, X-ray diffractometry and scanning electron microscope microanalysis/Raskete mineraalide paritolu Lemme paljandi Kvaternaari setetes, pohinedes optilisele mikroskoopiale, rontgendifraktomeetriale ja skaneerivale elektronmikroskoopiale

This hot fluid changes the rock so that minerals without hydroxyl groups (OH-) or water in their structures (pyroxene, plagioclase feldspar and olivine) are often altered to minerals with hydroxyl groups (OH-) in their structures, such as chlorite, epidote, actinolite and serpentine.

An evidence-based approach to teaching plate tectonics in high school

The samples of green schist are inequigranular and fine to coarse-grained and consist of amphibole including actinolite, plagioclase, quartz, epidote, carbonate, ilmenite, rutile, ore mineral(s) and a substantial amount of clay.

HOST ROCK PETROGRAPHY AND GEMMOLOGICAL PROPERTIES OF GEMSTONES ALONG THE INDUS SUTURE ZONE IN THE BARANG AREA OF BAJAUR AGENCY, NW PAKISTAN

Asbestos (Chrysolite, Amosite, Crocidolite, Tremolite, Actinolite, and Anthophyllite).

DIAGNOSTIC YIELD OF COMBINED EPIDEMIOLOGICAL AND RADIOLOGICAL DATA IN MALIGNANT PLEURAL MESOTHELIOMA: A PILOT STUDY

There is a dire need to acquaint our workforce with the composition of asbestos material in the form of fibrous silicate minerals actinolite, amosite, anthophyllite, crocidolite, tremolite and chysolite.

Asbestos ban

Quartz is found as part of a propylitic alteration assemblage including chlorite and actinolite that overprints higher temperature, pyroxene-bearing assemblages [64-66].

Permeability Changes Resulting from Quartz Precipitation and Dissolution around Upper Crustal Intrusions

Asbestos (chrysotile, amosite, crocidolite, tremolite, actinolite and anthophyllite).

Characteristics of airborne asbestos concentrations in Korean preschools

Compared to amphiboles in the tremolite-actinolite-ferroactinolite series (Deer et al., 1997), the overall pale colour, relatively low SG and weak pleochroism corresponded to a member with a low iron content, and therefore suggested tremolite, rather than actinolite, as the identity of this crystal.