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uraninite 瀝青鈾礦; 天然氧化鈾 瀝青鈾礦; 天然氧化鈾 uraninite n 1: 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 [synonym: {uraninite}, {pitchblende}] Uraninite \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. [1913 Webster]
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