Praseodymium is a soft, malleable, ductile, silver-yellow metal.
Praseodymium is a rare-earth metal of the lanthanide series in group IIIb of the periodic table . When exposed to air it forms a green oxide that does not protect it from further oxidation. Although the pure metal may be prepared by reduction of the chloride, it has few commercial uses. A major use of the metal is in a pyrophoric alloy used in cigarette lighter flints, but it need not be purified for this application. Praseodymium compounds have many uses.