Assertion: alumina | /r/HasProperty | inert
Facets:
value: fairly chemically
type: DEGREE
Source sentences:
text: Being a very hard material (Mohs hardness 9), alumina is widely used as an abrasive; being extraordinarily chemically inert, it is useful in highly reactive environments such as high pressure sodium lamps.
text: Being fairly chemically inert and white, aluminium oxide is a favored filler for plastics.