Assertion: berkelium | /r/HasAspect | commercial uses
Facets:
value: because of its rarity
type: CAUSE
value: presently
type: MANNER
value: with availability
type: OTHER
Source sentences:
text: Since the element is rare and difficult to create, it has no commercial uses, although it does crop up in research occasionally.
text: Because of its rarity, berkelium presently has no commercial use, however, with its relatively long half-life and availability in microgram quantities, Bk-249 is used extensively as a target to synthesize heavier elements by charged particle bombardment.
text: Berkelium has no commercial uses.
text: Because it only exists in such small quantities, berkelium has no commercial uses.