These cliffs proved, as Bennie had already suspected, to be a gigantic outcrop of pitchblende or black oxide of uranium.
It occurs in the pitchblende of Saxony, and the uranite of Cornwall.
pitchblende also occurs, and is mined for the extraction of radium.
The project at hand is to extract the newly discovered deposits of pitchblende on these satellites of Jupiter.
More illusive than gold and many times more precious, radium, the product of pitchblende, had somehow gotten into his blood.
M. Debierne has obtained a third radioactive substance from pitchblende, which he has called “Actinium.”
pitchblende is the best, but carnotite, which is a gray rock with yellowish streaks, is also good ore.
It would take a deposit of pitchblende richer than anything I've ever heard of to penetrate the lead.
And he had some of that concentrated essence of pitchblende in the chest when we started.
Uranium occurs chiefly as pitchblende, which is an impure oxide (U3O8).