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 ?
Fiber type was dichotomized into chrysotile versus amphiboles/mixed exposure to minimize the degrees of freedom and thus preserve statistical power, and because the difference between potencies for (close to pure) chrysotile exposure versus exposure involving amphiboles was one of the primary research questions.
At the first stage most attention was concentrated on the Archaean rocks and rock forming amphiboles, because the obtained results represent the background of a crustal segment unaffected by fluid interactions from the mantle.
Thin section study reveals that the amphiboles are mainly hornblende, tremolite and chlorite.
Further, he noted that deformed dykes containing amphibole with strongly preferred orientation belonged to well-equilibrated metamorphic assemblages, whereas more massive varieties with randomly oriented amphiboles were not completely recrystallized to peak metamorphic conditions.
The association with serpentines was stronger than with amphiboles.
2002), and the presence of alkali amphiboles places them among peralkaline granites.
It is important to differentiate between chrysotile fibre (white asbestos) and banned amphiboles fibers (blue and brown asbestos) on account of physical and chemical properties.
The principal varieties of asbestos are a serpentine material called chrysotile, and crocidolite, amosite, anthophyllite, tremolite, and actinolite--which are a type of dark mineral called amphiboles (Mirabelli et al.
The critique takes issue with the number of asbestos bodies required for a pathologic diagnosis of asbestosis, noting that chrysotile does not form asbestos bodies as well as the amphiboles.