Hafnium and zirconium are the two most similar elements.

Hafnium and zirconium are the two most similar elements. So they’re hard to separate. So far, silver heavy hafnium has only been used in a few special technical applications. Hafnium carbide HfC and tantalum hafnium carbide are very hard and mechanically durable, with the latter having a melting point of over 4000°C, the highest of all materials.#Hafnium #zirconium