iridio 82
Iridium . ( Of íride and -io ). 1. m. chemical element of no. atóm. 77 Metal in the Earth's crust is native, joined to Platinum and rhodium, nickel, iron and copper mineral. Color yellowish white, brittle, hard heavy fuse and very resistant to corrosion. It is used, alloyed with osmium, or Platinum jewelry and special materials. One of its isotopes is widely used in radiotherapy. (Símb.) Ir ).