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Found in all minerals containing zirconium, hafnium is a ductile metal with a brilliant silver luster. It is strong and extremely corrosion resistant. Zirconium and hafnium's chemistry are virtually identical (except that hafnium's density is twice that of zirconium) and therefore, are extremely difficult to seperate. Hafnium's properties are significantly influenced by the zirconium impurities present.
|Property Name||Property Value||Property Name||Property Value|
|Atomic Code||(72Hf178.49)||First Ionization Energy||127K-cal/g-mole|
|Melting Point||2227°C||Linear Coefficient of Expansion||5.9x10-6K-1|
|Boiling Point||4603°C||Electrical Resistivity||35.1µΩ-cm|
|Specific Heat @ 25°C||0.035cal/g°C||Vapor Pressure @ 2007°C||10-9atm|
|Heat of Fusion||32.4cal/g||Modulus of Elasticity @ 20°C||19.8x106psi|
|Heat of Vaporization||155k-cal/g-atom||Thermal Neutron Cross Section||105barns/atom|
|Atomic Volume||13.6W/D||Tensile Strength||86,000psi|