(L. Ruthenia, Russia ) Discovered in 1827 by Osann and in 1844 officially by Klaus. Occurs with platinum and other ores in North and South America, and in pyroxinite deposits in South Africa.
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hard, white transition metal, does not tarnish at room temp. (at 800 C) , resistant to acids but is explosive in the presence of potassium chlorate, some compounds highly toxic and explosive
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hardener for platinum and palladium, alloying for corrosion resistance, superconductive