Home 68 Er Erbium back to the periodic table
 
Atomic number   68
Symbol   Er
Atomic weight   167.26
Density [g/cm3]   9.05
Melting point [°C]   1500
Boiling point [°C]   2900
1st Ionization energy [eV]   6.10
Electronic configuration   [Xe] 4f12 6s2
Oxidation number (most stable)   3
Atomic radius [pm]   175.7
Ionic radius [pm]   89 (3+)
Abundance in crustal rocks [ppm]   3.5
Origin of the name   amed after the Swedish village Ytterby
Discovery   1878 by the Swede Carl Gustav Mosander
Uses   no technical significance.
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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