Ardanium
this mineral has the unique property of growing stronger in the presence of radiation. This makes it a perfect material for creating fuel canisters for starships, especially capital-scale ships, which require huge amounts of power. This mineral was found in large quantities on the planet Questal, and the Emperor raided the planet in an attempt to expand his fleet of Super-class Star Destroyers. Unfortunately, the supply ran out just after a group of Alliance agents overthrew Moff Bandor.