Bismutite

Bismuth oeeurs mainly as bismite (a-Bi203), bismuthinite (Bi2S3) and bismutite [(Bi0)2C03] very oeeasionally it oeeurs native, in assoeiation with Pb, Ag or Co ores. The main eommereial souree of the element is as a byproduet from Pb/Zn and Cu plants, from whieh it is obtained by special processes dependent on the nature of the main product. Sulfide ores are roasted to the oxide and then reduced by iron or charcoal. Because of its low mp, very low solubiUty in Fe, and fairly high oxidative stability in air, Bi can be melted and cast (like Pb) in iron and steel vessels. Like Sb, the metal is too brittle to roll, draw, or extrude at room temperature, but above 225°C Bi can be worked quite well. 

Occurrence. Bismuth occurs in minerals such as bismite (Bi203), bismuthinite (Bi2S3), bismutite (Bi0)2(C03). 

Aragonite CaCOs PBF 11 184 trimorphs calcite, vaterite Bismutite Bi2(C03)02 PBF 11 259... 

Bismuth, which has been known since ancient times, was often confused with lead and tin. Basilius Valentinus described some of its uses in 1450, but it was in 1753 that bismuth was shown by Claude Francois Geoffroy to be a distinct element. Bismuth occurs freely in nature and in such minerals as bismuthinite (Bi2S3), bismite (Bi203), and bismutite KBiObCO i. ... 

Bismuth, element 83, is a soft gray naturally occurring metal, ft is most commonly found as bismite (Bi203), bismutite ((Bi0)2C03), or bismuthinite (Bi2S3). Bismuth is produced as a by-product of copper and lead smelting. It is the heaviest member of group 15 and the heaviest stable element. While there are many isotopes known, it is found naturally only... 

On the crystal structure of BijOaCOj (bismutite) and CaBi202(C03)2 (beyerite). 1746 685 ... 

Pb2C03Q2 (Phosgenite) Pb4S04(C03)2(0H>2 (Leadhillite) (Bi0)2C03 (Bismutite)... 

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