Assertion: erbium | /r/HasProperty | isolated
Facets:
value: by heating at 1450 oc
type: TEMPORAL
value: from its salts
type: OTHER
value: from the oxide
type: OTHER
Source sentences:
text: When erbium is isolated, it is soft, with a silvery luster which can tarnish in moist air.
text: Erbium is then isolated from the oxide or its salts by heating at 1450 oC with calcium in an argon atmosphere.