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Bowieite

Bowieite is a rhodium-iridium-platinum sulfide mineral (Rh, Ir, Pt)ā‚‚Sā‚ƒ, found in platinum-alloy nuggets from Goodnews Bay, Alaska. It was named after the British scientist Stanley Bowie, in recognition of his work on identification of opaque... Wikipedia
Formula (repeating unit): Rh2S3