What's the difference between pitchblende and uraninite?

Pitchblende

Definition:

• (n.) A pitch-black mineral consisting chiefly of the oxide of uranium; uraninite. See Uraninite.

Example Sentences:

Uraninite

Definition:

• (n.) A mineral consisting chiefly of uranium oxide with some lead, thorium, etc., occurring in black octahedrons, also in masses with a pitchlike luster; pitchblende.

Example Sentences:

• (1) U(VI) reduction resulted in the extracellular precipitation of the U(IV) mineral uraninite.