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Hafnium is a single element and therefore nonpolar.
Hafnium is a metal, steel grey.
Hafnium is malleable.
The density of hafnium is 13,31 g/cm3.
Hafnium is a natural chemical element; hafnium hasn't minerals but it is associated with zirconium (unrefined zirconium contain approx. 2 % hafnium).