Usually means: Uranium silicate mineral, radioactive, black.
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We found 6 dictionaries that define the word coffinite:

General (5 matching dictionaries)
  1. coffinite: Collins English Dictionary
  2. coffinite: Wiktionary
  3. coffinite: Infoplease Dictionary
  4. coffinite: Dictionary.com
  5. Coffinite: Wikipedia, the Free Encyclopedia

Computing (1 matching dictionary)
  1. coffinite: Encyclopedia

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Definitions from Wiktionary (coffinite)

▸ noun:  (mineralogy) A brown or black uranium-bearing silicate mineral.

Similar:
uraninite, komkovite, ferrocolumbite, fontanite, landauite, grunerite, ferrokaersutite, braunite, covelline, cuprouranite, more...

Types:
pitchblende, uraninite, carlinite, pechblende, more...

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Similar:
uraninite, komkovite, ferrocolumbite, fontanite, landauite, grunerite, ferrokaersutite, braunite, covelline, cuprouranite, more...

Types:
pitchblende, uraninite, carlinite, pechblende, more...



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