DiBeryllium

Category:Resources
Quantum crystals capable of focusing high-energy EM radiation.
Used in: Laser turrets
(spoilers!)
 
Common sources: Bonuses from surveying Anomalies, salvage from Imperial technology derelicts (Talonians, etc.), purchases from Trade factions on the cheap (e.g. Ermyr Defenders, Aquarian Traders, the Guild).
Remarks: If you do not plan on making lasers a large part of your weapons scheme, you can get away with accumulating four Diberyllium per laser turret, until the technology can be unlocked, and sell the excess to the Goryr.
Trivia: The name is a nod to the ubiquitous dilithium of Star Trek fame, an element purported to be capable of channeling energy into the warp fields needed for faster-than-light travel between the stars.
Lithium is the first elemental alkali metal, with the smallest atomic mass (in the conventional sense. If hydrogen or -- heaven forbid, helium -- were under sufficient pressure and other environmental conditions to first condense and then freeze to a metallic substance, then hydrogen would be the "lightest" metal. The properties of metallic hydrogen are in any case not known, so the matter is conjecture at best).
Beryllium is after lithium on the periodic table of elements, having the next-heaviest atomic mass.