Assertion: neptunium | /r/AtLocation | pure state
Facets:
value: rarely
type: DEGREE
Source sentences:
text: Neptunium is rarely found in a pure state, and results from decay of other radioactive materials, such as Plutonium and Americium.
text: Neptunium is rarely found in a pure state, and results from decay of other radioactive materials, such as Plutonium and Americium.