Hyperbaride
this artificial material has the unique property of being able to withstand incredibly high temperatures, flux densities, and radiation levels without being damaged. This made hyperbarides a requirement in the production of heavy turbolasers as well as the immense lasers used on the Death Stars. The Empire spent a great deal of money developing and manufacturing hyperbarides, for without them the firepower of the Imperial Navy would have been greatly reduced. However, the production of hyperbarides required incredible amounts of thermal energy, and the process releases highly toxic by-products in its wake. Thus, the production of hyperbarides was often relegated to lifeless worlds or moons. The huge, powerful plants which produce these materials are almost always staffed with live workers, as the process of creating the hyperbarides produces electromagnetic waves and radiation which affects the operation of most droids. Note that Goroth: Slave of the Empire indicates that there are certain hyperbarides which occur naturally in the galaxy.