Praseodymium is a chemical element with symbol Pr and atomic number 59. Praseodymium is a soft, silvery, malleable and ductile metal in the lanthanide group. It is valued for its magnetic, electrical, chemical, and optical properties.
P 7929 (OTTO) Praseodymium, pieces or lumps, 10-30 mm, 99.9% Cas 7440-10-0 - used in aircraft engines; yttrium and neodymium are also viable substitutes.