Platinum group
SIX NOBLE, PRECIOUS METALLIC ELEMENTS CLUSTERED TOGETHER IN THE PERIODIC TABLE: RUTHENIUM, RHODIUM, PALLADIUM, OSMIUM, IRIDIUM, AND PLATINUM
Platinum family; Platinum Series; Platinum group metals; Platinum metals; Platinum group metal; Platinide; Platinum group elements; Platinoid; Platinum-group metal; Platinum-group metals; PGMs; Platinum-group
The platinum-group metals (abbreviated as the PGMs; alternatively, the platinoids, platinides, platidises, platinum group, platinum metals, platinum family or platinum-group elements (PGEs)) are six noble, precious metallic elements clustered together in the periodic table. These elements are all transition metals in the d-block (groups 8, 9, and 10, periods 5 and 6).