is a colorant for welders goggles.
Properties
Praseodymium is soft, silvery, malleable, and ductile. It is somewhat more resistant to corrosion
in air than europium, lanthanum, cerium, or neodymium, but it does develop a green oxide
coating that spalls off when exposed to air. As with other rare-earth metals, it should be kept
under a light mineral oil or sealed in plastic.
Cost
The metal (99%+ pure) is priced at about $70/oz.
Sources: CRC Handbook of Chemistry and Physics and the American Chemical Society.
Last Updated: 12/19/97, CST Information Services Team
Praseodymium