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Praseodymium • Lanthanide Rare Earth

Primary XPS region: Pr3d
Overlapping regions: Cu2p
Binding energies of common chemical states:

Chemical state Binding energy Pr3d5/2/eV
Pr metal 932

Experimental Information

Interpretation of XPS spectra

crystal structureAbout This Element

Symbol: Pr
Date of Discovery: 1885
Name Origin: greek prasios and didymos
Appearance: unknown
Discoverer: C.F. Aver von Welsbach
Obtained From: salts

Melting Point: 1208 K
Boiling Point: 3400 K
Density[kg/m3]: 6640
Molar Volume: 20.8 × 10-6 m3/mol
Protons/Electrons: 59
Neutrons: 82
Shell Structure: 2,8,18,21,8,2
Electron Configuration: [Xe]6s24f3
Oxidation State: 3
Crystal Structure: hexagonal

Praseodymium should be stored under a light mineral oil or sealed in plastic as it will develop a green coating which, in return, exposes more metal to oxidation. First discovered in 1885 by C. F. Auer von Welsbach, a German chemist, praseodymium’s primary use is as an alloying agent combined with magnesium to create high-strength metals for aircraft engines. Praseodymium is also a necessary element for studio lighting and projector lights used in the motion picture industry. The element also forms the core of the carbon arc lights. Praseodymium gives glasses and enamels a yellowish color. The element has no known biological role.


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