Leitum
Leitum is a fictional mineral that appears in science fiction and fantasy works as a rare and valuable substance. The term is a constructed neologism with no standardized real‑world etymology, and its properties and significance vary from story to story. In many depictions it functions as a plot device that enables advanced technology or acts as a coveted resource.
Description and properties are not fixed across works; leitum is commonly described as a crystalline material
Occurrence and procurement are likewise variable. Leitum is often stated to be exceedingly scarce, mined on
Common uses in fiction include power generation for spacecraft, energizing advanced weapons, or serving as a
See also: unobtainium, same‑class plot device; rare minerals in fiction.