Symbol Zr Atomic radius: pm 159 Fusion: kJ/Mole 21.0
Name Zirconium Ionic radius: pm (+4)84 Boiling point: C 4409
Atomic number 40 Electron affinity 0.43 Melting point: C 1855
Atomic weight 91.22 1st  ion potential 6.63 Specific Heat Cap: J/(g K) 0.28
Classification Trans metal Natural form Solid Thermal Cond: W/(cm K) 0.23
Configuration [Kr]4d25s2 Crystal structure Hex Electrical Cond 0.0236
Oxidation states 4 Density 6.52 Abundance: mg/kg-crust 165
Electronegativity 1.33 Vaporization: kJ/Mole 581.6    
Zirconium was discovered in 1789 by Martin Klaproth. Uses - deoderants, fuel rod clad, laboratory crucibles