Assertion: tellurium | /r/AtLocation | free
Facets:
value: in nature
type: LOCATION
value: occasionally
type: DEGREE
Source sentences:
text: Tellurium is found free in nature, but is most often found in the ores sylvanite (AgAuTe 4 ), calaverite (AuTe 2 ) and krennerite (AuTe 2 ).
text: Tellurium is occasionally found as the free element, but is more often found as gold telluride (calaverite), and combined with other metals in the USA, Canada, Peru and Japan.
text: Tellurium is found free in nature (native elemental form), but is most often found in the Telluride ores of Gold:
text: While being found free in nature, tellurium is most frequently found as the telluride of gold (calaverite) and several other ores.