Assertion: neptunium | /r/ObjectUse | used as precursor
Facets:
value: for the formation of plutonium-238
type: PURPOSE
value: widely
type: DEGREE
Source sentences:
text: While neptunium itself has no commercial uses at present, it is used as a precursor for the formation of plutonium-238, used in radioisotope thermal generators to provide electricity for spacecraft.
text: Though neptunium has no commercial uses at present, it is widely used as a precursor for the formation of Plutonium-238, used in radioisotope thermal generators, which are used to power some spacecraft.