Kellinite

Kellinite was a material used in starship construction.

Ensign Harry Kim insisted on using kellinite for the hull of the Delta Flyer during its construction in 2375. Lieutenant Tuvok believed this a poor choice. 

During the Dominion War, the Federation government initiated a trade agreement with Aligar for kellinite, despite that planet's use of slave labor for mining the material. 

The determined that the planet Tan-Sanah, visited in 2376, was a rich in kellinite deposits.