Anglesite

Lead is obtained chiefly from galena (PbS) by a roasting process. Anglesite, cerussite, and minim are other common lead minerals. 

Blount, C.W. (1974) Synthesis of barite, celestite, anglesite, witherite, and strontianite from aqueous solutions. Am. Min., 59, 1209-1219. 

In roadside soils, lead was present in the more soluble forms such as PbCIBr and PbS04 from automobile emissions compared to soils near smelters or in mining sites (Adriano, 2001), which contained oxides, sulfides and carbonates (galena, anglesite and cerussite) with low solubility. However, after oxidation of sulfide into sulfate, the soils became very acidic, resulting in the increase in both solubility and bioavailability of the trace metals. 

Of all the lead oxide minerals, cerussite and anglesite [1,2] have been studied the most. The flotation properties of cerussite and anglesite are different in such a way as the anglesite is less amenable to sulphidization than cerussite. The sulphidization process for both minerals is a delicate process and is sensitive to (a) level of additions of sulphidizer, (b) the number of sulphidization stages and (c) conditioning time with sulphidizer. 

Excess of sulphidizer has a negative effect on cerussite and anglesite recovery. Figure 20.1 shows the effect of the level of Na2S on cerussite and anglesite recovery. These results have demonstrated that too high an addition of sulphidizer results in mineral depression. 

Normally the Na2S and NaHS are used as sulphidizers. The choice between Na2S and NaHS depends on the gangue composition, as well as the ratio between cerussite and anglesite in the ore. The anglesite sulphidization process is more complete when using NaHS. 

Figure 20.1 Effect of level of Na2S on cerussite and anglesite recovery from carbonate lead...

Occurrence. It is by far the most abundant of the heavy elements. The most important ore is galena PbS. Other minerals are anglesite PbS04, cerrusite PbCO. ... 

Lead is the 35th most abundant element on Earth. Although it has been found in its free elemental metal state, it is usually obtained from a combination of the following ores galena (PbS), anglesite (PbSO ), cerussite (PbCOj), and minum (Pb O ). Lead ores are located in Europe (Germany, Rumania, and France), Africa, Australia, Mexico, Peru, Bolivia, and Canada. The largest deposits of lead in the United States are in the states of Missouri, Kansas, Oklahoma, Colorado, and Montana. 

Lead sulfate occurs in nature as the mineral, anglesite. It is an essential component of lead-sulfuric acid storage batteries and forms during discharge... 

Elemental composition Pb 68.32%, S 10.57%, O 21.10%. the solid crystalline powder or the mineral anglesite may be characterized by x-ray techniques and physical properties. Lead can be analyzed in the sohd compound or its nitric acid extract by various instrumental techniques (See Lead). 

Mixed controi PbS04 (anglesite) 1 x 10 4 MgCl2 6H2O (bischofite ) 5 2... 

Zhang, P. Ryan, J. A. 1998. Formation of pyro-morphite in anglesite-hydroxyapatite suspensions under varying pH conditions. Environmental Science Technology, 32, 3318-3324. 

ANGLESITE, Naturally occumng lead sulfate (PbSQi), which crystallizes in the orthorhombic system and may be found mixed with galena, from which it is usually formed by oxidation. Hardness, 3 specific gravity, 6,12-6.39 luster, adamantine to vitreous or resinous transparent to opaque streak, white colorless to white or green, but rarely may be yellow or blue, This mineral is used as a source of lead. 

Anglesite, whose name derives from Anglesey, England, is found in many European localities in the LJnited States it has been found in large crystals in the Wheatley Mine. Phoenixville. Pennsylvania, and also in Missouri, Utah, Arizona, and Idaho. 

Alteration results from the addition of new material or partial removal of original material from a mineral, e.g.. anglesite after galena or gypsum after unhydrite. 

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