Assertion: hafnium | /r/AtLocation | zirconium ores
Facets:
value: with symbol hf
type: OTHER
Source sentences:
text: Hafnium is a bright, silvery metallic element that occurs in zirconium ores, with symbol Hf.
text: Hafnium occurs in zirconium ores.
text: Hafnium occurs in zirconium ores.