Yurium
Yurium was a chemical compound with the chemical formula YU2. This compound was capable of storing large amounts of energy and was usually used as an explosive. A radioisotope byproduct, Jakmanite 632, was created artificially from the decay of high-energy yurium. ()

During his scheme to commandeer the  using temporal loops, Harry Mudd destroyed the ship in one of the loops using an anicium-yurium reaction. ()

In the Soong-type androids, a yurium membrane was used for the construction of the housing for the emergency manual control. ()

Bela Tyken used anicium and yurium from his cargo to create a massive explosion to free his ship, which was trapped in a rift in space. ()

In 2365, a planetary scan by the  detected 2% of yurium in the atmospheric composition of Theta VIII. ()

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Explosives
Chemical compounds