tremolite
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.

Look at other dictionaries:

  • Trémolite — Catégorie IX : silicates[1] Campolungo, Tessin Suisse (Topotype) …   Wikipédia en Français

  • Tremolite — is a member of the amphibole group of silicate minerals with composition: Ca2Mg5Si8O22(OH)2. Tremolite forms by metamorphism of sediments rich in dolomite and quartz. Tremolite forms a series with actinolite and ferro actinolite. Pure magnesium… …   Wikipedia

  • trémolite — ● trémolite nom féminin (du nom du val Tremola, nom propre) Variété d amphibole, contenant du magnésium et du calcium. (L asbeste, l amiante sont des variétés fibreuses de trémolite.) ⇒TRÉMOLITE, subst. fém. MINÉR. Silicate naturel, variété d… …   Encyclopédie Universelle

  • Tremolite — Trémolite La trémolite est un type d amiante. De la famille des amphiboles, la trémolite, dont les fibres sont particulièrement longues, est la forme la plus dangereuse d amiante. Nouvelle Calédonie En 1994, l’Inserm dénonce l utilisation de la… …   Wikipédia en Français

  • Tremolite — Trem o*lite, n. [From Tremola, a valley in the Alps, where it was discovered.] (Min.) A white variety of amphibole, or hornblende, occurring in long, bladelike crystals, and coarsely fibrous masses. [1913 Webster] …   The Collaborative International Dictionary of English

  • tremolite — [trem′ə līt΄] n. [after the Tremola valley, in Switzerland, where it was found + ITE1] a hard, white to dark gray, monoclinic amphibole, Ca2Mg5Si8O22 (OH) 2, that is closely related to actinolite and found in either fibrous or crystalline form;… …   English World dictionary

  • tremolite — noun Etymology: French trémolite, from Tremola, valley in Switzerland Date: 1799 a white or gray mineral of the amphibole group that is a silicate of calcium and magnesium • tremolitic adjective …   New Collegiate Dictionary

  • tremolite — tremolitas statusas T sritis chemija apibrėžtis Amfibolų grupės mineralas. formulė Ca₂(Mg,Fe)₅Si₈O₂₂(OH)₂ atitikmenys: angl. calamite; tremolite rus. каламит; тремолит ryšiai: sinonimas – kalamitas …   Chemijos terminų aiškinamasis žodynas

  • tremolite — tremolitic /trem euh lit ik/, adj. /trem euh luyt /, n. Mineral. a white or grayish variety of amphibole, Ca2Mg5Si8O22(OH)2, usually occurring in bladed crystals. [1790 1800; named after Tremola, valley in Switzerland; see ITE1] * * * …   Universalium

  • tremolite — noun A pale grey/green amphibole mineral that is a mixed calcium and magnesium silicate, with the chemical formula CaMgSiO(OH); sometimes used in place of asbestos …   Wiktionary

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