platinum group
Sign in to saveAlso known as PGE, platinum group elements, platinum-group elements, Platinum Group Metals, PGM
six noble, precious metallic elements clustered together in the periodic table: ruthenium, rhodium, palladium, osmium, iridium, and platinum
~12 min read
Encyclopedic overview
The platinum-group metals (PGMs) 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).
The six platinum-group metals are ruthenium, rhodium, palladium, osmium, iridium, and platinum. They have similar physical and chemical properties, and tend to occur together in the same mineral deposits. However, they can be further subdivided into the iridium-group platinum-group elements (IPGEs: Os, Ir, Ru) and the palladium-group platinum-group elements (PPGEs: Rh, Pt, Pd) based on their behaviour in geological systems.
Excerpted from Wikipedia’s “platinum group” article, available under the CC BY-SA 4.0 licence.