What is Hafnium?
[[File:Hf-crystal bar.jpg|thumb|Hafnium Crystal Bar, mady by [[Crystal bar process]]]] '''Hafnium''' is a [[chemical element]]. It has the chemical symbol '''Hf'''. It has the [[atomic number]] 72. It is a [[metal]]. It is silver gray. In chemistry it is placed in a group of metal elements named the [[transition metal]]s. The chemistry of hafnium is similar to [[zirconium]]. Hafnium is found in zirconium [[mineral]]s. Hafnium is used in [[tungsten]] [[alloy]]s in [[filament]]s and [[electrode]]s. It is also used as a [[neutron]] [[absorber]] in [[control rod]]s in [[nuclear power plant]]s. ==Related pages== * [[Periodic table]] * [[List of common elements]] {{Periodic Table}} {{chem-stub}} [[Category:Transition metals]]