Phobium Phobium represented a high-density metallic alloy. Its primary component was chanlon ore, which naturally occurred on the planets Gargon and Dor.
Its initial discovery occurred thousands of years prior to the Galactic Civil War, and it was intended for implementation within power cells. Jedi Knights occasionally utilized phobium power cells as well as emitters to power their lightsabers. In the era of the Galactic War, specifically the conflict between the Galactic Republic and the Sith Empire, phobium was implemented in the construction of heavy armor.
During the initial stages of the Galactic Civil War, Emperor Palpatine positioned teams of laborers on Gargon for the purpose of extracting the material. The ore originating from Dor underwent processing and combination with doonium compounds, which were subsequently applied as a coating to the power core of the second Death Star.