allanite


allanite

allanite nom féminin (de T. Allan, nom propre) Silicate naturel de la famille des épidotes, contenant des terres rares (cérium, lanthane, néodyme, praséodyme). ● allanite (synonymes) nom féminin (de T. Allan, nom propre) Silicate naturel de la famille des épidotes, contenant des terres...
Synonymes :

⇒ALLANITE, subst. fém.
MINÉR. Silicate radioactif, de couleur noire ou brun sombre généralement en cristaux allongés, à surface terne et très fragiles (d'apr. Le Guide des roches et minéraux, Neuchâtel, Delachaux et Niestlé, 1969). Synon. orthite :
Plusieurs gadolinites, orthites, allanites, sont pyrognomes au plus haut degré.
É. DE BEAUMONT, Note sur les émanations volcaniques et métallifères, 1847, p. 63.
Étymol. ET HIST. — 1838 chim. (Ac. Compl. 1842).
Du nom de Thomas Allan, minéralogiste angl. (1777-1833); suff. -ite.

Encyclopédie Universelle. 2012.

Regardez d'autres dictionnaires:

  • Allanite — from the Mt. Isa – Cloncurry area, Queensland, Australia (scale bar 1 inch) General …   Wikipedia

  • Allanite — Al lan*ite, n. [From T. Allan, who first distinguished it as a species.] (min.) A silicate containing a large amount of cerium. It is usually black in color, opaque, and is related to epidote in form and composition. [1913 Webster] …   The Collaborative International Dictionary of English

  • allanite — alanitas statusas T sritis chemija apibrėžtis Mineralas. formulė (Ca,Ce,Th)(Fe,Mg)Al₂[O|OH|SiO₄|Si₂O₇] atitikmenys: angl. allanite; ortite rus. алланит; ортит ryšiai: sinonimas – ortitas …   Chemijos terminų aiškinamasis žodynas

  • allanite — allanitic /al euh nit ik/, adj. /al euh nuyt /, n. Mineral. a member of the epidote group, a silicate of calcium, cerium, aluminum, and iron, occurring chiefly in brown to black masses or prismatic crystals. [1835 45; named after Thomas Allan… …   Universalium

  • allanite — noun Any of a group of silicate minerals that are a source of rare earth metals …   Wiktionary

  • allanite — [ alənʌɪt] noun a brownish black mineral of the epidote group, consisting of a silicate of rare earth metals, aluminium, and iron. Origin C19: named after the Scottish mineralogist Thomas Allan + ite1 …   English new terms dictionary

  • allanite — al·lan·ite …   English syllables

  • allanite — /ˈælənaɪt/ (say aluhnuyt) noun a mineral, a silicate of calcium, cerium, aluminium, and iron, chiefly occurring in brown to black masses or prismatic crystals; orthite. {named after Thomas Allan, 1777–1833, English mineralogist. See ite1} …   Australian English dictionary

  • allanite — …   Useful english dictionary

  • List of minerals A-B (complete) — It is currently not possible to have a complete list of minerals . The International Mineralogical Association is the international group that recognises new minerals and new mineral names, however minerals discovered before 1959 did not go… …   Wikipedia


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