alunogen

alunogen
/euh looh"neuh jeuhn/, n.
a mineral, hydrous sulfate of aluminum, Al2(SO4)3·18H2O, occurring as a white, fibrous crust on quarry or mine walls.
[1865-70; < F alun (see ALUNITE) + -O- + -GEN]

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      a sulfate mineral formed by sulfate solutions that attack aluminous minerals; alunogen is hydrated aluminum sulfate, formulated Al2(SO4)317H2O. It typically occurs as an efflorescence or crevice filling in pyrite-containing coal formations, shales, or slates, as well as in the gossan (weathered capping) of sulfide ore deposits and in volcanic fumarole deposits. In older literature, alunogen and other hairlike sulfate minerals were called Haarsalz (“hair salts”). For detailed physical properties, see sulfate mineral (table).

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Look at other dictionaries:

  • Alunogen — aus Almyras, Agia Varvara, Zypern Chemische Formel Al2[SO4]3 • (12+5)H2 O[1] …   Deutsch Wikipedia

  • Alunogen — also called feather alum and hair salt is a colourless to white (although often coloured by impurities, like Fe substituting for Al) fibrous to needle like aluminium sulfate mineral often found on the walls of mines and quarries as secondary… …   Wikipedia

  • Alunogen — A*lu no*gen, n. [F. alun alum + gen.] (Min.) A white fibrous mineral frequently found on the walls of mines and quarries, chiefly hydrous sulphate of alumina; also called feather alum, and hair salt. [1913 Webster] …   The Collaborative International Dictionary of English

  • Alunogen —   der, s, Keramohalịt, triklines Mineral der chemischen Zusammensetzung Al2[SO4]3 · 18 H2O, weiß oder gelblich, Härte nach Mohs 1,5 2, Dichte 1,77 g/cm3; als Krusten auf Braun und Steinkohlen, auch flüssig in Kohlenklüften; Zersetzungsprodukt… …   Universal-Lexikon

  • alunogen — alunogenas statusas T sritis chemija apibrėžtis Mineralas. formulė Al₂[SO₄]₃·18H₂O atitikmenys: angl. alunogen rus. алуноген …   Chemijos terminų aiškinamasis žodynas

  • alunogen — noun An aluminium sulfate mineral often found on the walls of mines and quarries. Syn: feather alum, hair salt …   Wiktionary

  • Alunogen — Alu|no|gen der; s, e <zu ↑...gen> ein farbloses bis rötliches Mineral, Aluminiumsulfat …   Das große Fremdwörterbuch

  • alunogen — alu·no·gen …   English syllables

  • alunogen — əˈlünəjən noun ( s) Etymology: French alunogène, from alun + gène gen : a mineral consisting of a white fibrous aluminum sulfate Al2(SO4)3.18H2O frequently found on the walls of mines and quarries called also feather alum, hair salt …   Useful english dictionary

  • Liste der Minerale — Die Liste der Minerale ist eine alphabetisch geordnete Übersicht von Mineralen, Synonymen und bergmännischen Bezeichnungen. Ebenfalls aufgeführt werden hier Mineral Varietäten, Mineralgruppen und Mischkristallreihen, zu denen teilweise bereits… …   Deutsch Wikipedia

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