Pitchblende



[pich-blend] /ˈpɪtʃˌblɛnd/

noun, Mineralogy.
1.
a massive variety of uraninite, occurring in black pitchlike masses: a major ore of uranium and radium.
/ˈpɪtʃˌblɛnd/
noun
1.
a blackish mineral that is a type of uraninite and occurs in veins, frequently associated with silver: the principal source of uranium and radium. Formula: UO2
n.

also pitch-blende, 1770, a loan-translation of German Pechblende; see pitch (n.2) + blende.
pitchblende
(pĭch’blěnd’)
A brown to black, often crusty, cubic mineral that is a principal ore of uranium. It is highly radioactive. Chemical formula: UO2.

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