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Mineralpedia Details for Fencooperite

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Fencooperite

Fencooperite

Formula
Ba6Fe3+3Si8O23(CO3)2Cl3┬ĚH2
Crystal System
Trigonal 
Crystal Habit
Aggregates, Anhedral Grains, Platy 
Luster
Vitreous - Adamantine 
Color
jet black, dirty gray brown 
Streak
grayish black 
Class
Trigonal - Ditrigonal Pyramidal 
Fracture
Conchoidal - Uneven 
Hardness
4.5-5 
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Fencooperite from West face of Trumbull peak, Mariposa Co., California, United States

Fencooperite
            from West face of Trumbull peak, Mariposa Co., California, United States
Special Info
Type Locality

Isolated black grains about to 0.5mm with Gillespite in Sanbornite matrix. There are 7-8 grains.

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