Definitions for: Uraninite

[n] a mineral consisting of uranium oxide and trace amounts of radium and thorium and polonium and lead and helium; uraninite in massive form is called pitchblende which is the chief uranium ore

Webster (1913) Definition: U*ran"i*nite, n. (Min.)
A mineral consisting chiefly of uranium oxide with some lead,
thorium, etc., occurring in black octahedrons, also in masses
with a pitchlike luster; pitchblende.

Synonyms: pitchblende

See Also: atomic number 92, mineral, U, uranium, uranium ore

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