Home 45 Rh Rhodium back to the periodic table

Atomic number   45
Symbol   Rh
Atomic weight   102.90550
Density [g/cm3]   12.41
Melting point [°C]   1966
Boiling point [°C]   3730
1st Ionization energy [eV]   7.46
Electronic configuration   [Kr] 4d8 5s
Oxidation number (most stable)   5, 4, 3, 2, 1, 0
Atomic radius [pm]   134.5
Ionic radius [pm]   66 (3+)
Abundance in crustal rocks [ppm]   0.0001
Origin of the name   (greek) rhodeos = rose (colour of many rhodium compounds)
Discovery   1803 by Wollaston
Uses   as Pt/Rh catalytic nets, for Pt/Rh Pt thermocouples.

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© 2004 Büro für angewandte Mineralogie · Dr. Stephan Rudolph · D-47918 Tönisvorst
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