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Straczekite

#DO53041

Straczekite

#DO53041
Availability
Sold
Size
4 x 3.5 x 2 cm - Miniature 
Formula
(Ca,K,Ba)V8O20·3H2O (RRUFF)
Locality
Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States
Tagged
vanadium

Not a phosphate, but for sake of semi-completeness, it is here on this update because it is a good, rare mineral. Straczekite is tar black and crystallizes in plates grouped in curled-up balls. They are quite weird looking actually. You can't find them anywhere else. It's a four-locality mineral.

Straczekite

Formula
(Ca,K,Ba)V8O20·3H2
Crystal System
Monoclinic 
Crystal Habit
Microscopic Crystals, Fibrous 
Cleavage
Perfect, None, None 
Luster
Greasy (Oily) 
Color
greenish black 
Streak
greenish black 
Class
Monoclinic - Prismatic 
Hardness
1-2 

Data courtesy of Webmineral.

Collection
Don Owens Collection

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