Name :  Hafnium
Symbol :  Hf
Atomic Number :  72
Atomic Weight :  178.49
Specific Heat :  0.14 J/gK
Melting Point :  2227°C
Vaporization :  575.0 kJ/mol
Boiling Point :  4602°C
Electronegativity :  1.3
Density@293 K :  13.2 g/cm³
Discovered :  Dirk Coster, Georg von Hevesy, Denmark, 1923
Description :  Silvery, ductile metal.
Uses :  Used in reactor control rods because of its ability to absorb neutrons.