Uridium

Uridium is an unstable mineral. In it's raw form uridium would explode when exposed to an electrical charge. (DS9 episode: "Civil Defense")

The Cardassians used uridium alloy in the construction of their sensor arrays. During the occupation of Bajor the Cardassians mined uridium which was processed with the help of Bajoran slave labour on the station Terok Nor. (DS9 episodes: "Indiscretion", "Civil Defense")