(Gr. rhodon, rose) Discovered in 1803-4 by Wollaston.
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silvery white, transition metal, high reflectance, hard, durable, exposure to fumes and dust should be limited, upon heating it turns to the oxide when red and at higher temperatures turns back to the element
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alloying to harden platinum and palladium, metals resistant to corrosion, used for optical instruments, jewelry, decoration, as a catalyst