Assertion: tritium | /r/HasProperty | rare
Facets:
value: in nature
type: LOCATION
value: because of its 12.4-year half-life
type: CAUSE
Source sentences:
text: Tritium is rare in nature but can be made artificially in nuclear reactions.
text: Tritium is a rare isotope (form) of hydrogen – the only radioactive form of this widespread natural element.
text: Tritium is rare in nature because of its 12.4-year half-life.