Praseodymium(Pr) is the one of rare earth metals with atomic number 59. Praseodymium is a soft, silvery, malleable and ductile metal valued for its magnetic, electrical, chemical and optical properties. Due to praseodymium high potential reactiveness it is very hard to find a pure praseodymium metal in nature. It slowly develops a green oxide coating. Praseodymium was found by separating didymium into two different elements, which one of them was praseodymium and other was neodymium, in 1885 by the Austrian chemist Baron Carl Auer von Welsbach. The name praseodymium comes from the Greek prasinos meaning “green” and didymos “twin”. Praseodymium is stable only in aqueous solution with the 3+ oxidation state. Aqueous praseodymium ions are yellowish-green. Large amounts of praseodymium are found in monazite and bastnasite minerals. Praseodymium could be isolated by ion exchange and solvent extraction and through calcium reduction of anhydrous chloride or fluoride. The very first use of ...
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