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Metauranocircite

#PD34514
SOLD
Metauranocircite from Davier mine, Annie Creek, Lawrence Co., South Dakota, United States - PD34514
Metauranocircite from Davier mine, Annie Creek, Lawrence Co., South Dakota, United States - PD34514

Metauranocircite

#PD34514
Availability
Sold
Size
7 x 4 x 2 cm - Sm Cabinet 
Formula
Ba(UO2)2(PO4)2·8H2O (RRUFF)
Locality
Davier mine, Annie Creek, Lawrence Co., South Dakota, United States
Tagged
phosphate

Looks like Autunite but is not, it contains barium. Might be considered the barium analog of Autunite and is also monoclinic whereas Autunite is orthorhombic. But is hard to tell by the crystals since both are thin tabular. Both are very fluorescent. Metauranocircite from the Black Hills is also seemingly fluorescent under sunlight. The mine was discovered by Count Davier and sparked a mini uranium rush to the northern Black Hills. It went no where. It was referenced in the older literature as Autunite. The mine still exsist but is hidden good, down Lost Camp, up a hill, around a clump of pine trees, follow an old rail grade and you'll see it. Good luck.

Fluorescent

Metauranocircite

Formula
Ba(UO2)2(PO4)2*6-8(H2O) 
Crystal System
Monoclinic 
Crystal Habit
Thin platy, rectungular, fan-like groups. 
Luster
Pearly 
Color
green 
Class
Monoclinic - Sphenoidal 
Hardness
2-2.5 

Data courtesy of Webmineral.

Collection
Phillips Collection
Special Info
Fluorescent
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