pyromorphite


pyromorphite
/puy'reuh mawr"fuyt/, n.
a mineral, lead chlorophosphate, Pb5P3O12Cl, occurring in crystalline and massive forms, and of a green, yellow, or brown color; green lead ore: a minor ore of lead.
[1805-15; < G Pyromorphit. See PYRO-, MORPH-, -ITE1]

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      phosphate mineral, lead chloride phosphate [Pb5(PO4)3Cl], that is a minor ore of lead. It occurs with galena, cerussite, and limonite in the oxidized zone of lead deposits, where it forms very brightly coloured, heavy, barrel-shaped crystals or globular masses. For properties, see phosphate mineral (table).

      Arsenic and vanadium often replace phosphorus in the pyromorphite structure. Thus, in nature, pyromorphite occurs mixed with both mimetite and vanadinite; these mixtures, called solid-solution series, show continuous chemical variation between the pure compounds. Pyromorphite is a member of a group of minerals related to apatite in structure and properties.

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Universalium. 2010.

Look at other dictionaries:

  • Pyromorphite — Catégorie VIII : phosphates, arséniates, vanadates[1] Pyromorphite Ussel, Correze France (4x4cm) …   Wikipédia en Français

  • Pyromorphite — Pyr o*mor phite, n. [G. pyromorphit, from Gr. ? fire + morfh form.] (Min.) Native lead phosphate with lead chloride, occurring in bright green and brown hexagonal crystals and also massive; so called because a fused globule crystallizes in… …   The Collaborative International Dictionary of English

  • pyromorphite — ● pyromorphite nom féminin Chlorophosphate naturel de plomb, hexagonal, que l on trouve à la partie supérieure des gisements de galène …   Encyclopédie Universelle

  • pyromorphite — [pī΄rə môr′fīt΄] n. [Ger pyromorphit: see PYRO & MORPH & ITE1] a semihard, greenish, hexagonal mineral, Pb5 (PO4) 3Cl, an ore of lead; lead phosphate chloride …   English World dictionary

  • Pyromorphite — Infobox mineral name = Pyromorphite category = Mineral boxwidth = boxbgcolor = imagesize = 250px caption = Yellow pyromorphite from Australia formula = Pb5(PO4)3Cl molweight = 1,356.37 gm color = Colorless, Green, Yellow, etc... habit = massive… …   Wikipedia

  • pyromorphite — piromorfitas statusas T sritis chemija apibrėžtis Mineralas. formulė Pb₅[Cl|(PO₄)]₃ atitikmenys: angl. pyromorphite rus. пироморфит …   Chemijos terminų aiškinamasis žodynas

  • pyromorphite — noun a mineral consisting of lead chloride and phosphate; a minor source of lead • Syn: ↑green lead ore • Hypernyms: ↑mineral * * * pyromorphite, morphous see pyro 2, 1 …   Useful english dictionary

  • pyromorphite — noun Etymology: German Pyromorphit, from Greek pyr + morphē form Date: circa 1814 a mineral consisting essentially of a chloride and phosphate of lead …   New Collegiate Dictionary

  • pyromorphite — noun A yellowish green mineral, a mixed phosphate and chloride of lead with the chemical formula Pb(PO)Cl, that is sometimes mined as an ore …   Wiktionary

  • pyromorphite — (pi ro mor fi t ) s. f. Phosphate de plomb naturel …   Dictionnaire de la Langue Française d'Émile Littré


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