Praseodymium

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Praseodymium
Name Praseodymium
Symbol Pr
Atomic number 59
Atomic mass 140.90765 amu
Normal state Solid
Classification Metallic
Crystal structure Hexagonal
Color Silvery; can develop a green tarnich when exposed to air.
Date of discovery 1885
Name of discoverer Baron Carl Auer von Welsbach
Name origin From the Greek prasios, meaning green, and didymos, meaning twin.
Uses Used as an alloying agent with magnesium to create high-strength metals for use in aircraft engines; Cores of carbon arc lights, used in the film industry for studio lighting and projector lights; Praseodymium compounds colour glasses and enamels yellow.
Obtained from Obtained from monazite and bastnasite ores.
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