Home 40 Zr Zirconium back to the periodic table
 
Atomic number   40
Symbol   Zr
Atomic weight   91.224
Density [g/cm3]   6.51
Melting point [°C]   1852
Boiling point [°C]   3580
1st Ionization energy [eV]   6.84
Electronic configuration   [Kr] 4d2 5s2
Oxidation number (most stable)   4
Atomic radius [pm]   160
Ionic radius [pm]   72 (4+)
Abundance in crustal rocks [ppm]   162
Origin of the name   (arab.) zargun = gold colour (after the gem zircon) 
Discovery   1798 by Klaproth
Uses   for corrosion proof materials in the chemical technique as well as for the production of coloured glazes.
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 © 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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