platinum group

six noble, precious metallic elements clustered together in the periodic table: ruthenium, rhodium, palladium, osmium, iridium, and platinum

en-US/ˈplætnəm ˈɡɹup/
en-GB/ˈplætɪnəm ˈɡɹuːp/

دسته بندی ها:

transition metalprecious metal