Assertion: magnetite | /r/HasProperty | an iron oxide
Facets:
value: with the chemical formula
type: OTHER
Source sentences:
text: Magnetite is an iron oxide with the chemical formula Fe 3 O 4 .
text: Magnetite is an iron oxide with the chemical formula Fe 3 O 4 whereas hematite is an iron oxide with the chemical formula Fe 2 O 3 .