Sarium
From Star Trek : Freedom's Wiki
Sarium is a material. (VOY: "Real Life")
The Starfleet of the mid-22nd century used sarium microcells in powering a variety of their technologies. The Vissians also used sarium microcells to charge their weapons. (ENT: "Cogenitor")
A Vostigye space station destroyed by astral eddies in 2373 was constructed of Sarium, Boronite, and Carbon-60 Composites. (VOY: "Real Life")
