This element is still available. Select an option below to secure it.
|Click here to secure it now
Proceed to the donation page for this element.
|Click here to pledge in instalments
Gifts may be pledged over a period of two to five years and made in as many split-payments.
Hafnium is a lustrous, silvery, ductile metal. It resists corrosion due to formation of a tough, impenetrable oxide film on its surface. The metal is unaffected by alkalis and acids, except hydrofluoric acid. Hafnium is difficult to separate from its group 4 partner, zirconium, because the two elements have atoms that are the same size.
Hafnium and its alloys are used for control rods in nuclear reactors and nuclear submarines because hafnium is excellent at absorbing neutrons and it has a very high melting point and is corrosion resistant. It is used in high-temperature alloys and ceramics, since some of its compounds are very refractory: they will not melt except under the most extreme temperatures.