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 ?
Lung burdens of talc and its amphibole contaminants are markers of exposure to talc-containing dusts.
The Libby Asbestos Superfund site was placed on the NPL in 2002 due to high levels of Libby Amphibole asbestos in and around the communities of Libby and Troy.
The mineralogical composition of I-type granites is summarized as follows: K- feldspar (60%) > quartz (9%) = plagioclase (9%) > biotite (8%) > amphibole (5%) > opaque minerals (4%) > allanite (2%) = apatite (2%) > titanite (1%).
Garnet, olivine, represent prograde mineral assembladge while epidote, amphibole, serpentine shows retrograde mineralogy (Figs.
Amphibole stability in [H.sub.2]O--undersaturated calc-alkaline melts.
An early scapolitisation event, where Cl-rich scapolite coexisted with enstatite, phlogopite, amphibole, and rutile is constrained at 600 to 700[degrees]C at mid-crustal levels [19-21].
Mineral analysis performed on tissue from the left lung by transmission electron microscopy and energy dispersive Xray spectrometry detected: no commercial or noncommercial amphibole asbestos fibres or serpentine chrysotile asbestos.
The metamorphic rocks that are found in the Meeiganga area and its surroundings include pyroxene amphibole gneiss, amphibole-biotite gneiss and banded amphibolite.
Furthermore, he will enlighten visitors and gemstone enthusiasts on newly found amphibole ruby deposits.
Amphibolite contains a lot of metamorphic minerals such as biotite and amphibole. In this connection, it is interesting to find out how a varying degree of metamorphic reworking affects the physical properties of rocks.