amphibole


Also found in: Thesaurus, Medical, Legal, Encyclopedia, Wikipedia.

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 ?
In places they underwent amphibolitization: a green amphibole replaces the pyroxene, with a concomitant formation of albite and epidote, whereas the ilmenite is replaced by titanite and magnetite.
3] N Min Max Mean Rapakivi massifs Marjamaa II phase 55 2 593 2 746 2 663 Neeme I phase 65 2 620 2 730 2 654 Neeme II phase 14 2 614 2 650 2 631 Orogenic structural zones Alutaguse zone Gneisses, migmatized 360 2 540 2 890 2 680 Tallinn zone Metamorphic rocks, migmatized 1 158 2 530 3 310 2 700 Quartz-feldspar gneisses 138 2 540 2 750 2 620 Amphibole gneisses, amphibolites 367 2 570 3 090 2 770 Al-rich gneisses 366 2 530 3 310 2 710 West Estonian zone Amphibole gneisses, amphibolites 145 2 620 3 140 2 800 Metamorphic rocks, migmatized 365 2 540 3 110 2 760 South Estonian zone Metamorphic rocks, migmatized 442 2 590 3 360 2 780 Amphibole- pyroxene gneisses 171 2 620 3 360 2 840 Al-rich gneisses 116 2 670 3 060 2 830 Rock type Susceptibility, [10.
Chromium is commonly found in rocks of mafic composition, where it occurs as an impurity in mica and amphibole minerals through substitution for the Al and Fe in their crystal structures.
The two major types of asbestos fibers, serpentine and amphibole, have chemical and structural differences that may influence their interactions with cells.
Both zones are exposed at the surface and occur as steeply dipping, parallel tabular stockworks of chloritic, amphibole, feldspar gneiss.
Bulk mineralogy of these rocks includes olivine, clinopyroxene, +- magnetite, +-chromite, +- serpentine, +- chlorite, +- plagioclase and amphibole as traces.
29) These stomata, which also exist in the parietal pleura, may be the site of accumulation of long amphibole fibers in the pleura.
In the above samples, the LAAA manifestation is also associated with the presence of oriented in one direction minerals such as amphibole, biotite, chlorite and others (Kovalevskiy et al.
Sometimes as a result of the carried out reactions of the initial minerals the Harzburgites are transformed into Amphibole, magnetite or spinel and finally some part into talk and in the next process the Amphibole content of the rock is changed into Tremolite--Actinolite.
Amosite and crocidolite are the commercially valuable forms of amphibole asbestos.