flow of platinum and the group metals in united states introduction uses pgm sources releases to environment conclusion references i pt is a malleable silvery metal found at trace quantities lithosphere it commonly grouped with five other elements ruthenium ru rhodium rh palladium pd osmium os irridium ir these which exhibit similar properties are referred as or pge mineral deposits containing will contain portions pgms varying amounts following diagram depicts location periodic table often noble due their resistance oxidation also characterized exhibiting high melting points mechanical strength temperatures stable electrical density non contaminating behavior highly resistant discoloration wear primary use automobile catalytic converters devices used reduce harmful emissions impact air quality therefore interesting look material flows associated generation since application materials
