Here is a brief description of praseodymium.
Praseodymium is soft, silvery, malleable, and ductile.
It was prepared in relatively pure form in 1931. The metal should be stored under an inert atmosphere or under mineral oil or petroleum. It is a component of misch metal, used for lighter flints, and of the glass in welders' goggles. Here is a brief summary of the isolation of praseodymium. Praseodymium metal is available commercially so it is not normally necessary to make it in the laboratory, which is just as well as it is difficult to separate it from as the pure metal.