Voltarium is an artificial unstable radioactive element which is used solely for the creation of a Nova bomb. Due to the unique atomic and radioactive signature of this artificial element planets, individuals and/or groups who choose to manufacture the substance are quite easy to find. As previously stated Voltarium is an artificial element and thus must be created in specialized factories. In the age of the first Systems Commonwealth it appears that many ships, particularly Glorious Heritage design, were outfitted with Nova bombs, however, in the centuries that followed, Voltarium became a rather scarce commodity, only found on rogue systems like Marduk.
Voltarium is also thought to have potential as a material used in tessaract equipment, as seen when Vice Admiral Uxulta requests a Nova Bomb for her "equipment".