English

Noun

pitchblende ‎(plural pitchblendes)

1. (mineralogy) Naturally-occurring uranium oxide, a variety of the mineral uraninite.
   • 2004, Richard Fortey, The Earth, Folio Society 2011, p. 205:

     Working in Paris in 1898, Marie and Pierre Curie processed thousands of pounds of pitchblende from the same glass-factory tailings in order to isolate two radioactive elements that had hitherto been unknown: radium and polonium.

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