psilomelane
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PSILOMÉLANE — Oxyde hydraté naturel de manganèse observé généralement en concrétions à structures en zones concentriques ou en agrégats microcristallins (les enduits dendritiques sont fréquents). Le psilomélane est noir à l’éclat submétallique. La dureté (4 6) … Encyclopédie Universelle
Psilomelane — Psi*lom e*lane, n. [Gr. ? bare + ?, ?, black.] (Min.) A hydrous oxide of manganese, occurring in smooth, botryoidal forms, and massive, and having an iron black or steel gray color. [1913 Webster] … The Collaborative International Dictionary of English
Psilomelane — Infobox mineral name = Psilomelane category = boxwidth = boxbgcolor = caption = A native sample of psilomelane formula = The general formula Ba(Mn2+)(Mn4+)8O16(OH)4 or as (Ba,H2O)2Mn5O10 Barium Manganese Oxide Hydroxide molweight = 590.03 gm… … Wikipedia
psilomelane — /suy lom euh layn /, n. a common mineral consisting of a mixture of pyrolusite and other oxides of manganese, usually found in black, rounded masses: an ore of manganese. [1825 35; < Gk psiló(s) bare, smooth + mélan, neut. of mélas black] * * *… … Universalium
psilomelane — psilomelanas statusas T sritis chemija apibrėžtis Mineralas. formulė mMnO·MnO₂·nH₂O atitikmenys: angl. psilomelane rus. псиломелан … Chemijos terminų aiškinamasis žodynas
psilomélane — (psi lo mé la n ) s. m. Sorte d oxyde de manganèse naturel … Dictionnaire de la Langue Française d'Émile Littré
psilomelane — psi·lo·mel·ane … English syllables
psilomelane — /saɪloʊˈmɛleɪn/ (say suyloh melayn) noun 1. a common mineral, a hydrated barium manganate, occurring in smooth, black to steel grey, botryoidal or stalactitic forms and in masses; an ore of manganese. 2. any hard massive manganese oxide. {Greek… …
psilomelane — noun a mineral consisting of hydrated basic oxide of manganese and barium; a source of manganese • Hypernyms: ↑mineral • Substance Meronyms: ↑manganese, ↑Mn, ↑atomic number 25 … Useful english dictionary
Manganese — Not to be confused with Magnesium. This article is about the chemical element. For the ghost town, see Manganese, Minnesota. For the steamship, see SS Manganese. chromium ← manganese → iron ↑ Mn ↓ Tc … Wikipedia
