Sentence Examples


  • Pitchblende attained considerable notoriety towards the end of the 19th century on account of two important discoveries.
  • In 1789 Klaproth isolated from pitchblende a yellow oxide which he viewed as the oxide of a new metal, which he named uranium, after the newly discovered planet of Herschel.
  • The only practically available raw material for 'the extraction of uranium is pitchblende (q.v.).
  • Pure pitchblende is U308, which, in relatively good specimens, forms some 80% or more of the whole.
  • To extract the metal, the pitchblende is first roasted in order to remove the arsenic and sulphur.

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