Thallium and Thallium Compounds
2006; Linguagem: Inglês
10.1002/0471238961.2008011202122113.a01.pub2
AutoresBob Blumenthal, Kelly Sellers, Matthew Koval,
Tópico(s)Inorganic Chemistry and Materials
ResumoAbstract Thallium is a soft and malleable heavy metal with a bluish‐white luster when freshly cut with a knife that is quickly dulled to a blue‐gray color by the formation of an oxide film. The abundance of thallium in the earth’s crust is estimated at 0.7 mg/kg (ppm) and is contained in > 40 naturally occurring minerals. Thallium and all compounds of thallium are highly toxic. Great care should be exercised when handling the element or any of its compounds. After thallium bearing pesticides were banned domestically, the demand for thallium was greatly reduced. New uses for thallium and its compounds have emerged including alloy use in bearings and contact points, amalgam use in switches and seals for use in the polar region, stratosphere or space program, cardiovascular imaging, infrared optics and radiation detectors, photoelectric cells, analytical reagents, catalysts for organic syntheses, thin films and coating technologies in the automotive and aerospace industries, and high‐temperature superconductive wires, tapes and films.
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