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Pergium was an element used in pergium reactors, on which at least a dozen worlds depended for energy. (TOS: "The Devil in the Dark")

According to the Starfleet Medical Reference Manual, (p.18) the element pergium, symbol Pe, atomic weight 292, atomic number 111 (which in reality is Roentgenium), was first discovered by Humans on the planet Mercury in 2023.

History[]

Pergium was used for power in 23rd century nuclear reactors such as the PXK. One key source of pergium for the United Federation of Planets was the planet Janus VI, where, in 2267, it was mined by a Federation colony in conjunction with the Horta. (TOS: "The Devil in the Dark")

Pergium was considered a rare commodity in some areas of the Delta Quadrant. In 2373, the crew of the USS Voyager attempted to acquire pergium from Bahrat's trading station near the Nekrit Expanse, to regenerate the filters of their environmental control systems. Neelix's friend Wixiban helped to procure twenty of the forty-five kilograms they needed. (VOY: "Fair Trade")

There were several pergium mines in operation in the Sappora system during the 24th century. In 2375, the sixth largest mining facility was owned by Yanas Tigan on Sappora VII, while one owned by the Ferengi on Timor II was the fifth largest. The same year, the Orion Syndicate was also working its way into the industry out of New Sydney. (DS9: "Prodigal Daughter")

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