Lead Element, Alloys and Symbols

• Galena, PBS
• Vanadinite, PB4 (pbCI 9 VO4)3.
• Gerussite, PBCO3
• Anglesita, PbSO4
• Phosgenite, (PBCI) CO3
• Crocoite,Pr Cr O4
• Pyromorphite ,Pb4 (PbCI) (PO4)3
• Mimetite, Pb4 (Pb4 (PbCI )Aso4 )3   
• Wulfenite, PbM0O4

Galena is the usual primary ore of lead and furnishes by far the greater part of the metal. Cerussite and anglesite are secondary minerals which in smaller amounts in the oxidized zone of lead deposits. Galena occurs most commonly associated with zinc ores, especially sphalerite, or in connetion with silver ores. Lead, which is derived from ores that are free from silver, is known as “soft lead,” white “desilverized “ lead, with is obtained from silver ores, is known as “hard lead”. Lead ores are most commonly found as replacement deposits in limestone rocks, either in the form of beds or irregular bodies, or as small masses disseminated through a stratum of the rock. For the associations and distribution of lead ores see under galena, page 150.

Metallic lead is used in the form of sheet, et. It is used to make weighs, bullets and shot. It is a constituent of various alloys such as solder (lead and antimony), low-fusing alloys (lead, bismuth and tin. A large amount, of lead is used in the form of the basic carbonate, (Pb.OH)2Pb (CO3 )2, which is known as white lead, and is very valuable as a paint. The oxides of lead, litharge, pbo, and miniun. (Pb3 O4, are used in making fine grades of glass, in glazing earthenware an as pigments.

Lead chromates are used as yellow and red paints. Lead acetate, known as sugar of lead, has important uses in various industries.