Hafnium 178
Appearance
Hafnium 178m2, Hf, atomic number 72. This nuclear isomer has the potential to unleash enormous quantities of gamma radiation, making it an excellent ingredient for use in devastating weapons of mass destruction. As a result Hafnium 178 is a highly controlled substance that is universally illegal to own without special dispensation.
— In-Game Description
Hafnium 178 is a specific commodity item of Metals in the world of Elite: Dangerous.