Encyclopedia > Pitchblende

  Article Content

Uraninite

Redirected from Pitchblende

Uraninite is a uranium-rich mineral with a composition that is largely UO2, but which also contains UO3 and oxides of lead, thorium, and rare earths. The uraninite may occur as black octahedral crystals of high specific gravity (9.0 - 10.63); when in masses of pitch[?]-like lustre it is called pitchblende. All uraninites and pitchblende contain a minute amount of radium; it was in pitchblende from the Jáchymov[?] in Czechoslovakia that Marie Curie discovered radium.

An important occurrence of pitchblende is at Great Bear Lake[?] in the Northwest Territories of Canada, where it is found in large quantities associated with silver.

See also: list of minerals



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
Islandia, New York

... and 753 families residing in the village. The population density is 529.3/km² (1,369.6/mi²). There are 1,031 housing units at an average density of ...

 
 
 
This page was created in 24.3 ms