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What (who) is uraninite - definition
OXIDE MINERAL
Pitchblende; Uranite; Mineral uranium dioxide; Pitch blend; Pechblende; Pitchblend
![Uraninite crystals from [[Topsham, Maine]] (size: 2.7 × 2.4 × 1.4 cm)](https://commons.wikimedia.org/wiki/Special:FilePath/Uraninite-usa32abg.jpg?width=200 "Uraninite crystals from [[Topsham, Maine]] (size: 2.7 × 2.4 × 1.4 cm)")
uraninite
[j?'ran?n??t]
¦ noun a black, grey, or brown mineral consisting mainly of uranium dioxide.
Uraninite
·noun A mineral consisting chiefly of uranium oxide with some lead, thorium, ·etc., occurring in black octahedrons, also in masses with a pitchlike luster; pitchblende.
pitchblende
['p?t?bl?nd]
¦ noun a form of the mineral uraninite occurring in brown or black pitch-like masses and containing radium.
Origin
C18: from Ger. Pechblende, from Pech 'pitch' + Blende (see blende).
Wikipedia
Uraninite
Uraninite, formerly pitchblende, is a radioactive, uranium-rich mineral and ore with a chemical composition that is largely UO2 but because of oxidation typically contains variable proportions of U3O8. Radioactive decay of the uranium causes the mineral to contain oxides of lead and trace amounts of helium. It may also contain thorium and rare-earth elements.
