Hafnium (Hf)

Found in all minerals containing zirconium, hafniu ([Xe]4f¹⁴5d²6s²) (CAS 7440-58-6)  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 separate. Hafnium's properties are significantly influenced by the zirconium impurities present.