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.
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, 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.
References in periodicals archive ?
Together with the anglesite, the cadmium oxalate (CdC2O4) accounts for the opaque, orange-grey crust disfiguring parts of the painting on a macroscopic level.
Because of their high specific gravity, galena and anglesite concentrated on the bedrock surface as the fragments migrated downhill.
He recognized galena or anglesite in his gold pan while prospecting a tributary of the South McQuesten River at the west end of Galena Hill.
If no mineralized float or outcrop was found and overburden was deep, the pits were converted into shafts and deepened to bedrock, with the various overburden layers panned for the presence of galena, anglesite or siderite.
Factors that contributed to the efficiency of the technique were: a) the permafrost became a helpful aid because it reduced the danger of slumping walls and eliminated the need for timber support; b) it could be conducted safely year-round as long as water or thawed ground was not encountered during the warmer parts of the year; c) the Ag-rich galena in the float trains was relatively untouched by surface oxidation except for alteration to anglesite, which did not affect the Ag content; d) if the Ag content of the galena was found to be fairly high in the initial assays, the prospector could concentrate on following the galena without paying for a lot of additional assaying.
Lead phases detected in lead paint include synthetic hydrocerussite, crocoite, anglesite, phoenicochroite and possible plattnerite.
Ore minerals include gold, silver, chalcopyrite (CuFeS2), galena (PbS), bornite (CuFeS4), covellite (CuS), chalcocite (Cu2S), anglesite (PbSO4), sphalerite (ZnS), argentite (Ag2S), cerussite (PbCO3) and smithsonite (ZnCO3).