LYCOS RETRIEVER 
Nickel: Alloys
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Nickel is an abundant element. It is naturally found in soils, waters, and foods, and is emitted from volcanoes. It mainly occurs in combination with arsenic, antimony and sulfur in the environment. A large resource of nickel lies in the seabed. Pure nickel is found alloyed with iron in many meteors and the earth's core is believed to contain substantial quantities. Commercially important nickel ores are garnierite, pyrrhotite and millerite.
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Nickel is easy to work and can be drawn into wire. It resist corrosion even at high temperatures and for this reason it is used in gas turbines and rocked engines. Monel is an alloy of nickel and copper (e.g. 70% nichel, 30% copper with traces of iron, manganese and silicon), which is not only hard but can resist corrosion by sea water, so that it is ideal for propeller shaft in boats and desalination plants.
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Nickel is found as a constitutent in most meterorites and often serves as one of the criteria for distinguishing a meteorite from other minerals. Iron meteorites, or siderites, may contain iron alloyed with from 5 percent to nearly 20 percent nickel. Nickel is obtained commercially from pentlandite and pyrrhotite of the Sudbury region of Ontario, a district that produces about 30 percent of the nickel for the Free World.
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Nickel is released into the atmosphere by industries that make or use nickel, nickel alloys, or nickel compounds. It is ... released into the atmosphere by oil-burning power plants, coal-burning power plants, and trash incinerators.
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The coin known popularly as the “Nickel,” first appeared in 1866. The term “Nickel” refers to the main component of the alloy used to strike the coin and was meant to differentiate the new coin from another of the same denomination that circulated at the same time -- the Half Dime made of silver. Despite the fact that other coins were (and are still being) made primarily of Nickel, the term stuck in reference to the Five Cents piece
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