Praseodymium [Pr] (CAS-ID: 7440-10-0) locate me
An: 59 N: 82 Am: 
Group Name: Lanthanoid
Block: f-block  Period: 6 (lanthanoid)
State: solid at 298 K
Colour: silvery white, yellowish tinge Classification: Metallic
Boiling Point: 3793K (3520'C)
Melting Point: 1208K (935'C)
Density: 6.77g/cm3
Shell Structure diagram | Atomic Radius diagram
Isotopes | More Info
Discovery Information
Who: C.F. Aver von Welsbach
When: 1885
Where: Austria
Name Origin
Greek: prasios (green) and didymos (twin); from its green salts.
Sources
Can be found in rare earth minerals such as bastnasite and monazite. Obtained from the same salts as neodymium.
Uses
Praseodymium forms the core of carbon arc lights which are used in the motion picture industry for studio lighting and projector lights.
Used for coloring glass and ceramic glazes. Also used with neodymium to make lenses for glass maker's goggles because they filter out the yellow light present in glass blowing. It is alloyed with magnesium to create high strength metals.
Notes
Like all rare earth elements, praseodymium is of low to moderate toxicity. Praseodymium has no known biological role.
Dr. Matthew Sellars of the Laser Physics Centre at the Australian National University in Canberra, Australia slowed down a light pulse to a few hundred meters per second using Praseodymium mixed with silicate crystal.
Images