Cortenum is an element that was used in the manufacture of verterium cortenide, an alloy utilized by the Federation in the construction of the inner layer of the warp coils found in Intrepid-class engine nacelles.

In 2372, B'Elanna Torres was fairly certain USS Voyager could purchase needed monocrystal cortenum and polysilicate verterium at Hemikek IV. (VOY: "Investigations")

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