White lead ore

Weiss-blech, n. tin plate, -biechdose, /. tin can, tin box, tin. -blechwaren, f.pl. tinware, -blei, n. tin. -bleiche, /. bleaching, full bleach, -bleierz, n. white lead ore, cerussite. -biiitigkeit, /. leukemia, leucocythemia, -boden, m. Tech.) white ground, -brenneo, n, calcining at white heat, -brot, n. white bread, wheat bread. 

Occurrence.—Its most abundant ore is galena, PbS. It also occurs in white lead ore, PbCO , in anglesite, PbSO , and in horn lead, PbCli. 

Cerussite is of secondary origin, being found associated with other lead minerals, and is widely distributed. There are many European and American localities. Fine crystals have been obtained from Phocnixvillc. Pennsylvania Joplin. Missouri Leadville. Colorado Pima County, Arizona, and Dona Ana County, New Mexico. It is an ore of lead, and frequently carries values of silver. Derived from the Latin cetussa. white lead... 

Copper native in white lead, having the brightness of polished gold. The German version reads, born in black lead, as crystallised tin-ore. 

Long, white, sexangular, opaque Fluors, like an upright beam in a tesselated lead ore. 

Mineral poisons were also well known in the ancient world. In particular, the ores and compounds of arsenic, antimony, copper, mercury, and lead were familiar to many cultures. Pseudo-Dioscorides detailed the poisonous effects of arsenic (meaning sometimes the sulfide, sometimes the white oxide), litharge (red lead or lead oxide), cinnabar (mercuric sulfide), and white lead (lead acetate). Hippocrates, Nicander, Dioscorides, Galen, and Paul of Aegina wrote clinical accounts of lead poisoning, of which there were occasional epidemics, and miners were known to be at risk from the fumes created by smelting processes. 

In 1546 Agricola (p. 50) mentioned a white metal counterfei found on the walls of furnaces smelting lead ore at Goslar in the Harz. This may have been zinc. 

In 18.51 S(Snamiont, in order to explain the formation of stibnite in veins, made an experiment to obtain it by heating in a closed vase a mixture of antimony and sulphur in the presence of pure water up to 300°, or in the presence of bicarbonate of soda at 250°. The contact rocks are occasionally similar to those of veins containing lead ore, rocks having white mica and green minerals. Hereafter this type is denoted by A. 

Cerussite (PbCOs) is also naturally abundant and crystallizes in an orthorhombic form isomorphous with strontianite (SrCOs) and aragonite (CaCOs). PbCOs is often found with galena in ore veins because it forms when carbonate-rich waters interact with PbS in the common lead-zinc-limestone ore association (47). The derivative PbCOs Pb(OH)2, known as cemse or white lead , was the most important artificial white pigment in antiquity (3). Ceruse is made by treating naturally occurring lead compounds [mixtures of PbCOs, PbO, and... 

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