Assertion: protactinium | /r/AtLocation | pitchblende
Facets:
value: to 10 million of ore
type: TRANSITIVE-OBJECT
Source sentences:
text: Protactinium occurs in pitchblende to the extent of about 1 part 231Pa per 10 million parts of ore (i.e., 0.1 ppm).
text: Protactinium occurs in pitchblende to the extent of about 1 part 231Pa to 10 million of ore.
text: Protactinium occurs in pitchblende to the extent of about 1 part 231Pa to 10 million of ore.