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Uranophane with Haiweeite

#DS36620
SOLD
Uranophane from Mammoth mine, Presido Co., Texas, United States - DS36620
Uranophane from Mammoth mine, Presido Co., Texas, United States - DS36620

Uranophane with Haiweeite

#DS36620
Availability
Sold
Size
9 x 6 x 6 cm - Sm Cabinet 
Formula
Ca(UO2)2(SiO3OH)2·5H2O (RRUFF)
Locality
Mammoth mine, Presido Co., Texas, United States

The matrix is somekind of volcanic tuft or myrolitic rhyolite, but lining the vugs are scattered sprays of glassy yellow Uranophane to 1mm. These are magnificent crystals. Also, although not shown in the photos are lighter yellow smallr sprays of Haiweeite.

Radioactive!!

Uranophane

Formula
Ca(UO2)2SiO3(OH)2*5(H2O) 
Crystal System
Monoclinic 
Crystal Habit
Radial, Earthy, Massive - Fibrous 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
yellow, yellow brown, yellow green, yellow orange, light yellow 
Streak
yellowish white 
Class
Monoclinic - Sphenoidal 
Fracture
Uneven 
Hardness
2.5 

Data courtesy of Webmineral.

Collection
DeVito Collection
Special Info
Radioactive!!
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On Dakota Matrix
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