FACTOID # 87: 22% of American women aged 20 gave birth while in their teens. In Switzerland and Japan, only 2% did so.
 
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Encyclopedia > Coffinite

Coffinite is a uranium bearing silicate mineral: U(SiO4)1_x(OH)4x.


It is a glass-like black material, dark brown or pale-brown in color, possibly with grayish black streaks.




  Results from FactBites:
 
Alpha Track - Uranium Mineralization Concepts (2754 words)
Primary minerals other than uraninite and coffinite are a group containing niobium, columbium, tantalum, and titanium which are known as multiple oxides of uranium.
Coffinite is an important uranium ore mineral and is frequently found together with uraninite.
These secondary minerals are formed when uraninite and coffinite oxidize in the presence of iron or copper sulfides, in the absence of vanadium, phosphate or arsenic.
Coffinite (340 words)
Occurrence - The Coffinite occurs in an unremarkable sandstone.
Coffinite occurs in direct contact with the silica of the sandstone.
Appearence - The Coffinite occurs as small grains filling the interstities between the sand grains of the sandstone.
  More results at FactBites »


 

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