Assertion: molybdenum | /r/HasProperty | rare
Facets:
value: in the earth's crust
type: LOCATION
Source sentences:
text: While molybdenum is rare in the Earth's crust, molybdenite is relatively common and easy to process, and accounts for much of the metal's economic viability.
text: Molybdenum is a rare element, and it doesn’t occur naturally on its own.