iridosmine
noun
ir·id·os·mine ˌir-ə-ˈdäz-ˌmēn 
: a mineral that is a native iridium osmium alloy usually containing some rhodium and platinum
Word History
Etymology
borrowed from German Iridosmin, from Iridium iridium + Osmium osmium + -in -ine entry 2
Note: Named by the German mineralogist August Breithaupt (1791-1873) in "Mineralogische Untersuchung des russischen Platinsandes," Annalen der Physik, Band 84 (1826), pp. 500-05.
First Known Use
1827, in the meaning defined above