wulfenite

wulfenite
/wool"feuh nuyt'/, n.
a lead molybdate mineral, PbMoO4, occurring usually in tabular crystals, and varying in color from grayish to bright-yellow or red; yellow lead ore.
[1840-50; named after F. X. von Wulfen (1728-1805), Austrian scientist; see -ITE1]

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      lead molybdate, PbMoO4, a minor source of molybdenum and the second most common molybdenum mineral. It occurs in the oxidized zone of lead and molybdenum deposits. Fine crystals have been found at Příbram, Czech Republic; Yuma County, Ariz., U.S.; and Mapimi, Durango, Mex. Other localities include Germany, Austria, Sardinia, and Australia.

      Wulfenite ordinarily crystallizes as thin, beveled, square plates that have a resinous to adamantine lustre, and they are yellow to orange in colour. The Mohs hardness is 3; specific gravity, 6.5–7; and crystal system, tetragonal.

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Look at other dictionaries:

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  • Wulfenite — Wul fen*ite, n. [So named after F. X. Wulfen, an Australian mineralogist.] (Min.) Native lead molybdate occurring in tetragonal crystals, usually tabular, and of a bright orange yellow to red, gray, or brown color; also called {yellow lead ore}.… …   The Collaborative International Dictionary of English

  • wulfénite — ● wulfénite nom féminin (de F. X. von Wulfen, nom propre) Molybdate naturel de plomb, quadratique …   Encyclopédie Universelle

  • wulfenite — [wool′fə nīt΄] n. [Ger wulfenit, after F. X. von Wulfen (1728 1805), Austrian mineralogist] a soft, heavy mineral, PbMoO4, that is an ore of molybdenum and occurs usually as yellowish, tetragonal crystals; lead molybdate …   English World dictionary

  • Wulfenite — Infobox mineral name = Wulfenite category = Mineral boxwidth = boxbgcolor = imagesize = 320px caption = Wulfenite specimen from the Glove Mine, Arizona formula = Pb [MoO4] molweight = 367.14 gm color = Yellow to Brown habit = Tabular, bipyrmidal… …   Wikipedia

  • wulfenite — vulfenitas statusas T sritis chemija apibrėžtis Mineralas. formulė Pb[MoO₄] atitikmenys: angl. wulfenite rus. вульфенит …   Chemijos terminų aiškinamasis žodynas

  • wulfenite — noun Etymology: German Wulfenit, from F. X. von Wulfen died 1805 Austrian mineralogist Date: 1849 a tetragonal mineral that is a complex oxide of lead and molybdenum and occurs especially in bright orange yellow tabular crystals …   New Collegiate Dictionary

  • wulfenite — noun An orange mineral, lead molybdate, PbMoO, found in lead veins …   Wiktionary

  • wulfénite — (vul fé ni t ) s. f. Minéral qui est du plomb molybdaté …   Dictionnaire de la Langue Française d'Émile Littré

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