Assertion: group metal | /r/HasProperty | pgms
Facets:
Source sentences:
text: Palladium, platinum, rhodium, ruthenium, iridium and osmium form a group of elements referred to as the platinum group metals (PGMs).
text: The chalcophile platinum group metals (PGM) mainly occur in small (mixed) quantities with other chalcophile ores.
text: Platinum group metals (PGMs) in the periodic table H He Li Be B C N O F Ne Na Mg Al Si P S Cl Ar K Ca