Aeghon
From Star Trek : Freedom's Wiki
Aeghon is a extremely rare minerals only theorized by Starfleet scientists until it was discovered on the planet Quezal in large quantity. It is the only mineral known to achieve P6 level of photonic concentration. Because of its better concentration, any light based weapon would be improved by at least 20% if Aeghon was used.
It is theorized by a few Starfleet scientists (but never proved) that only through such level of photonic concentration could EMR be produced in the form of Thalaran Radiation, making Aeghon essential to produce such radiation. It therefore led Vice-Admiral Thinn to believe are in search for Aeghon to produce new Scimitar Battleship and explain why they have been so much interested in the planet Quezal.