Assertion: chalcopyrite | /r/HasProperty | primary ore mineral
Facets:
value: for copper
type: TRANSITIVE-OBJECT
Source sentences:
text: Chalcopyrite (CuFeS 2 ) is the primary ore mineral for copper, but leaching of this mineral under atmospheric conditions is slow due to the formation of surface passivating phases such as elemental sulphur and jarosite.
text: Chalcopyrite is the principal ore mineral.