Iridum

Iridum is a hypothetical chemical element described in speculative science and fiction as a transition metal with distinctive iridescent oxides. The name derives from iris, reflecting its rainbow-like appearance in certain compounds. In fictional accounts, Iridum is assigned to the heavier portion of the periodic table and is prized for a combination of hardness, corrosion resistance, and optical properties.

It is depicted as dense and hard, with a high melting point and a low reactivity at ambient temperatures. Its oxides exhibit vivid iridescence, which is central to its proposed applications in coatings.

In speculative geology, Iridum occurs in rare oxide minerals called iridide ore formed under high-pressure metamorphic conditions. Extraction and refinement are described as energy-intensive, requiring advanced smelting and purification techniques.

It is proposed for use in protective coatings, high-precision optics, jewel-like decorative elements, and specialized alloys that combine strength and corrosion resistance.

In fictional material safety profiles, Iridum compounds are dense and relatively inert under normal conditions, but fine particles can pose inhalation risks. Standard industrial hygiene practices are advised.

The name Iridum is derived from iris, alluding to its iridescent oxide. The concept first appears in 21st-century speculative literature and has since appeared in various media as an emblem of advanced materials research.