anglesite


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Related to anglesite: cerussite, smithsonite

anglesite

(ăng`gləsīt), pale green, blue, yellow-to-white, or colorless mineral, a sulfate of lead, PbSO4, that is formed by oxidation of galenagalena
or lead glance,
lustrous, blue-gray mineral crystallizing usually in cubes, sometimes in octahedrons. It is the most important ore and the principal source of lead.
..... Click the link for more information. , 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.

Anglesite

 

lead sulfate, a mineral with the chemical composition PbS04. It contains 73.6 percent PbO. A variety that is rich in BaO (8.45 percent) is called weisbachite, or baritoanglesite. The crystals are orthorhombic, usually tabular, more rarely short columnar or dipyramidal. Angle-site more often forms compact granular or earthy masses. Its color is white with yellow, gray, and green casts caused by impurities; its luster is diamondlike. According to the minerological scale, its hardness is 2.5–3.0; its density is 6,100–6,400 kg per cu m.

Anglesite is formed chiefly in oxidized zones of lead and zinc sulfide deposits, in cases of a change in galena (PbS), often in association with cerussite (PbC03). It is formed hydrothermally under conditions of blending the ore-bearing solutions with surface waters saturated with free oxygen. Anglesite is used as an ore for lead smelting.

anglesite

[′aŋ·glə‚sīt]
(mineralogy)
PbSO4 A mineral occurring in white or gray, tabular or prismatic orthorhombic crystals or compact masses. Also known as lead spar; lead vitriol.
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References in periodicals archive ?
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A few years ago some miners/dealers in Morocco found they could take white anglesite crystals, put them in household bleach for a few minutes, and change the color to a very attractive red-orange.
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Desautels, in fact, was still the Curator when the taxpayers in question donated a variety of specimens to the Smithsonian, among them, a sinhalite, a cat's-eye rubellite tourmaline, a couple of euclase crystals, several cerussite specimens, some wulfenite specimens and a few anglesite crystals.
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Matrix specimens show a crumbly mixture of galena, granular anglesite and "limonite," and in some cases these substances form inclusions in the cerussite crystals, making them look darker than they should.
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The new Grieger's advertised primarily gem materials, but also carried "superb specimens of Mexican wulfenite," probably from Los Lamentos, and "choice specimens of a new find of crystallized anglesite.
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They're all here, in multiple samples ranging in quality from "study grade" to absolutely superb: Freiberg acanthite and stephanite, Schneeberg proustite and erythrite and roselite and uranium-bearing species, Andreasberg pyrargyrite and dyscrasite and fluorite and pink apophyllite, Siegerland malachite and anglesite and millerite and galena, Schwarzwald fluorite and barite and silver, Obermoschel cinnabar and moschellandsbergite, Ems pyromorphite and cerussite, Johanngeorgenstadt mimetite, Ohrenstock hausmannite, Fichtelgebirge topaz and microcline and herderite, Ehrenfriedersdorf cassiterite and fluorapatite, Ilfeld manganite, Ronneburg whewellite, Hagendorf phosphates .
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The crystals line cavities to a few centimeters across in earthy brown limonite, associated with microcrystals of anglesite, arsenian siderite and beudantite.
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