Amphibole

Amphibole
Amphibole Am"phi*bole ([a^]m"f[i^]*b[=o]l), n. [Gr. 'amfi`bolos doubtful, equivocal, fr. 'amfiba`llein to throw round, to doubt: cf. F. amphibole. Ha["u]y so named the genus from the great variety of color and composition assumed by the mineral.] (Min.) A common mineral embracing many varieties varying in color and in composition. It occurs in monoclinic crystals; also massive, generally with fibrous or columnar structure. The color varies from white to gray, green, brown, and black. It is a silicate of magnesium and calcium, with usually aluminium and iron. Some common varieties are {tremolite}, {actinolite}, {asbestus}, {edenite}, {hornblende} (the last name being also used as a general term for the whole species). Amphibole is a constituent of many crystalline rocks, as syenite, diorite, most varieties of trachyte, etc. See {Hornblende}. [1913 Webster]

The Collaborative International Dictionary of English. 2000.

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  • Amphibole — (pronounced amfi bowl) defines an important group of generally dark colored rock forming inosilicate minerals, composed of double chain SiO4 tetrahedra, linked at the vertices and generally containing ions of iron and/or magnesium in their… …   Wikipedia

  • Amphibŏle — (Min.), so v.w. Hornblende …   Pierer's Universal-Lexikon

  • Amphibole — Amphibole, Hornblende …   Herders Conversations-Lexikon

  • amphibole — [am′fə bōl΄] n. [Fr < LL amphibolus, ambiguous < Gr amphibolos < amphiballein, to throw around, doubt < amphi , AMPHI + ballein, to throw: see BALL2] any of a group of rock forming minerals, as hornblende or actinolite, composed… …   English World dictionary

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  • amphibole — 1. amphibole [ ɑ̃fibɔl ] n. f. • 1787; gr. amphibolos « à double pointe » ♦ Géol. Groupe de silicates à deux clivages faciles et parfaits. Amphiboles alumineuses (ex. hornblende), non alumineuses (ex. actinote). Qui contient des amphiboles… …   Encyclopédie Universelle

  • amphibole — /am feuh bohl /, n. Mineral. 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… …   Universalium

  • Amphibole — Am|phi|bo|le 〈Pl.; Min.〉 Gruppe weitverbreiteter gesteinsbildender Minerale, z. B. Hornblende [→ Amphibolie] * * * Amphibole,   Singular Amphibol der, s, Gruppe sehr verbreiteter gesteinsbildender Calcium Magnesium oder Natrium Magnesium… …   Universal-Lexikon

  • Amphibole — Motif cristallin élémentaire des amphiboles Les amphiboles sont une famille de minéraux, silicates de fer, de calcium ou de magnésium. Elles cristallisent dans les systèmes orthorhombique et monoclinique en prismes très allongés, avec un clivage… …   Wikipédia en Français

  • amphibole — noun a mineral or mineral variety belonging to the amphibole group • Hypernyms: ↑mineral • Hyponyms: ↑nephrite, ↑actinolite, ↑anthophyllite, ↑asbestos, ↑hornblende • Member Holonyms: ↑ …   Useful english dictionary

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