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Mineralpedia Details for Straczekite

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Straczekite

Straczekite

Formula
(Ca,K,Ba)V8O20ยท3H2
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 
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Straczekite from Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States

Straczekite
            from Union Carbide mine, Wilson Springs, Garland Co., Arkansas, United States
Special Info
Type Locality

Straczekite, a very rare barium-vanadium oxide, occurs in only four localities worldwide. This specimen, collected by Don Owens, shows 0.75mm black crystals. Owens was mine geologist at this mine.

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