Iridium
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Iridium is a chemical element in the periodic table that has the symbol Ir and atomic number 77. A dense, very hard, brittle, silvery-white transition metal of the platinum family, iridium is used in high strength alloys that can withstand high temperatures and occurs in natural alloys with platinum or osmium. Iridium is notable for being the most corrosion resistant element known. It is used in high temperature apparatus, electrical contacts, and as a hardening agent for platinum.
In Traveller, Iridium has connotintaions of ratity and value. The Emperor's seat of power is know as the Iridium Throne.
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