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wulfenite
wulfenite Mineral, PbMoO4; sp. gr. 6.5–7.0; hardness 3; tetragonal; orange-yellow, olive-green, or brown; white streak; resinous lustre; crystals usually square plates or tablets, sometimes occurs massive, granular, or botryoidal; cleavage good {101}; sub-conchoidal fracture; occurs as a secondary mineral in the oxidized zones of ore minerals of lead and molybdenum, and in association with anglesite, cerussite, and pyromorphite.
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Cite this article
AILSA ALLABY and MICHAEL ALLABY. "wulfenite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "wulfenite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O13-wulfenite.html AILSA ALLABY and MICHAEL ALLABY. "wulfenite." A Dictionary of Earth Sciences. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-wulfenite.html |
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anglesite
anglesite Secondary lead mineral, PbSO4; sp. gr. 6.3–6.4; hardness 3; orthorhombic; normally colourless to white, but sometimes yellow, grey, or coloured by a bluish tinge; white streak; adamantine lustre; crystals tabular, prismatic, or pyramidal, or occurring as massive, granular, or compact aggregations; normally occurs in the oxidized zone of lead deposits, and often surrounds a core of galena.
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Cite this article
AILSA ALLABY and MICHAEL ALLABY. "anglesite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. AILSA ALLABY and MICHAEL ALLABY. "anglesite." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1O13-anglesite.html AILSA ALLABY and MICHAEL ALLABY. "anglesite." A Dictionary of Earth Sciences. 1999. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-anglesite.html |
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anglesite
anglesite , pale green, blue, yellow-to-white, or colorless mineral, a sulfate of lead, PbSO 4 , that is formed by oxidation of galena , crystallizing in the orthorhombic system and occurring also in granular or massive form. It is widely distributed and commonly associated with galena and other lead minerals. It is a secondary lead ore. |
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Cite this article
"anglesite." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. 27 May. 2012 <http://www.encyclopedia.com>. "anglesite." The Columbia Encyclopedia, 6th ed.. 2011. Encyclopedia.com. (May 27, 2012). http://www.encyclopedia.com/doc/1E1-anglesit.html "anglesite." The Columbia Encyclopedia, 6th ed.. 2011. Retrieved May 27, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-anglesit.html |
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