Pannide

Pannide is a fictional mineral species described in speculative mineralogy and science-fiction narratives. It is typically presented as an aluminosilicate with a layered, sheet-like crystal structure that supports extensive chemical substitution among alkali and earth-alkaline metals. In these contexts, pannide serves as a case study for crystal chemistry and metamorphic processes.

The name is generally traced to the imagined Pann region or to a fictional discoverer in various works. Descriptions place pannide deposits in tectonically active settings, often at mid-to-late-continental collision zones. Because pannide is not recognized in real-world geology, its properties vary across sources, reflecting authorial world-building rather than established measurements.

Typical physical properties in fictional accounts include a vitreous to pearly luster, a Mohs hardness around 5–6, and pronounced pleochroism that shifts color under different orientations of light. Crystals are described as tabular to fibrous, with colors ranging from colorless to pale green or blue and with clear basal cleavage.

Formation and occurrence are usually tied to high-temperature hydrothermal activity or ultrahigh-pressure metamorphism in subduction-zone complexes. Pannide is often described as occurring with other aluminosilicates such as mica, chlorite, and serpentine, and is associated with rare-element mineralization in the source narratives.

Uses in fiction include applications as an energy mediator, catalyst, or gemstone within world-building plots. Some sources treat pannide as an element that interacts with electromagnetic fields or stores subtle energy. There is no verified real-world occurrence of pannide outside of fictional literature.