Home 59 Pr Praseodymium back to the periodic table

 
Atomic number   59
Symbol   Pr
Atomic weight   140.90765
Density [g/cm3]   6.48
Melting point [°C]   931
Boiling point [°C]   3130
1st Ionization energy [eV]   5.42
Electronic configuration   [Xe] 4f3 6s2
Oxidation number (most stable)   4, 3
Atomic radius [pm]   182.0 (a)
Ionic radius [pm]   100 (3+)
Abundance in crustal rocks [ppm]   9.1
Origin of the name   (greek) praseos didymos = green twin
Discovery   1885 by Auer von Welsbach
Uses   metallic praseodymium is not used in the technique, its compounds are used for coloring glass (zircon-praseodymium-yellow).

This page in German - Diese Seite in Deutsch
© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
These recommendations are believed to be correct. However, no guarantee of their accuracy is given. Therefore, purchasers shall make their own tests to determine suitability for their use. These products are offered for industrial and related uses (e.g. research and development) only. However the user must take the necessary precautions appropriate for products containing chemicals. This description does not imply the absence of any patents, the responsibility whatsoever solely rests with the user.