amphibole

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am·phi·bole

 (ăm′fə-bōl′)
n.
Any of a large group of structurally similar silicate minerals, such as hornblende, that have a crystalline structure consisting of a double chain of linked SiO4 units and that contain various combinations of sodium, calcium, magnesium, iron, and aluminum. Several varieties of asbestos are fibrous forms of amphiboles.

[French, from Late Latin amphibolus, ambiguous, from Greek amphibolos, doubtful, from amphiballein, to throw on either side : amphi-, amphi- + ballein, to throw; see gwelə- in Indo-European roots.]

am′phi·bol′ic (-bŏl′ĭk) adj.

amphibole

(ˈæmfɪˌbəʊl)
n
(Minerals) any of a large group of minerals consisting of the silicates of calcium, iron, magnesium, sodium, and aluminium, usually in the form of long slender dark-coloured crystals. Members of the group, including hornblende, actinolite, and tremolite, are common constituents of igneous rocks
[C17: from French, from Greek amphibolos uncertain; so called from the large number of varieties in the group]

am•phi•bole

(ˈæm fəˌboʊl)

n.
any of a complex group of hydrous silicate minerals, containing chiefly calcium, magnesium, sodium, iron, and aluminum, and including hornblende, tremolite, asbestos, etc., occurring as important constituents of many rocks.
[1600–10; < French < Late Latin amphibolus < Greek amphíbolos thrown on both sides, ambiguous =amphi- amphi- + -bolos, derivative of bállein to throw]

am·phi·bole

(ăm′fə-bōl′)
Any of a large group of minerals composed of a silicate joined to various metals, such as calcium, magnesium, iron, or sodium. Hornblende is a mineral of the amphibole group.

amphibole

Any of a group of rock-forming ferromagnesian silicates.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.amphibole - a mineral or mineral variety belonging to the amphibole groupamphibole - a mineral or mineral variety belonging to the amphibole group
mineral - solid homogeneous inorganic substances occurring in nature having a definite chemical composition
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
amphibolite - a metamorphic rock composed chiefly of amphibole and plagioclase
nephrite - an amphibole mineral consisting of calcium magnesium silicate in monoclinic crystalline form; a source of jade that is less valuable than from jadeite; once believed to cure kidney disorders
actinolite - a green mineral of the amphibole group; calcium magnesium iron silicate
anthophyllite - a dark brown mineral of the amphibole group; magnesium iron silicate
asbestos - a fibrous amphibole; used for making fireproof articles; inhaling fibers can cause asbestosis or lung cancer
hornblende - a green to black mineral of the amphibole group; consists of silicates of calcium and sodium and magnesium and iron
Translations
References in periodicals archive ?
The final remedy includes the cleanup work that EPA has been conducting in recent years, with the addition of a long-term plan to manage Libby Amphibole asbestos that might be encountered following cleanup.
Effect of size fractionation on the toxicity of amosite and Libby amphibole asbestos.
The best model for understanding asbestos-related fibrogenicity and mesothelial carcinogenicity is the very slow clearance of long, thin biopersistent fibers, of which commercial amphibole asbestos (amosite and crocidolite), erionite, and refractory ceramic fibers are excellent examples, from respiratory compartments.
Erionite, a fibrous zeolite, has similar morphological and physical properties to amphibole asbestos.
Vermiculite was used extensively in home insulation despite the fact that it was contaminated with fibrous and nonasbestiform amphibole asbestos (Pardee & Larsen, 1929).
The correlation between amphibole asbestos and lung disease has been demonstrated around the world, from Canada to Cyprus, and perhaps most convincingly in the mining town of Libby, Montana, where hundreds of residents have been diagnosed with asbestos-related diseases and many have died.
The amphibole asbestos has different physical and chemical properties from chrysotile, states a Natural Resources Canada (NRCan) report.
HSE recognises that the risks to human health associated with chrysotile are lower than those associated with amphibole asbestos (blue, brown etc) but that does not imply that chrysotile does not cause cancer.
The iron-formation also hosts amphibole asbestos which was extensively mined in the past.
Amosite and crocidolite are the commercially valuable forms of amphibole asbestos.
Vermiculite ore from a mine near Libby, Montana, is known to be contaminated with amphibole asbestos (primarily winchite, rich-terite, and tremolite), which is liberated in the mining and processing of the ore [Agency for Toxic Substances and Disease Registry (ATSDR) 2008; Meeker et al.
Distribution and characteristics of amphibole asbestos fibres, measured with the light microscope, in the left lung of an insulation worker.