Orkulosun

Orkulosun is a fictional mineral described in speculative geology and science fiction. It is portrayed as a rare, high-energy-density oxide-sulfide compound with pronounced luminescence under ultraviolet light and a brittle, hard crystalline lattice. In worldbuilding, its composition is said to combine silicate-oxide frameworks with trace sulfide activators and rare-earth dopants that generate its glow.

The name Orkulosun is derived from Orkus, a mythic underworld figure, paired with sun to reflect its radiant behavior under UV light. This framing is used in fictional source material to evoke both its hardness and its light-emitting properties.

In fiction, orkulosun is said to occur in ultramafic rocks and deep pockets within meteorites; extraction is described as technically challenging due to brittleness and scarcity, requiring specialized high-temperature processing and contamination-control measures to preserve its purported properties.

Applications imagined for orkulosun include serving as an energy-storage medium for compact fusion reactors, high-density batteries for space habitats, or as a catalyst in exotic chemical processes. Because orkulosun is a product of worldbuilding, there are no real-world assays, classifications, or standardized properties associated with it.