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Fencooperite

#59279

Fencooperite

#59279
Availability
Sold
Size
1.3 x 1 x 0.7 cm - Thumbnail 
Formula
Ba6Fe3+3Si8O23(CO3)2Cl3·H2O (RRUFF)
Locality
Trumbull Peak, Mariposa Co., California, United States

Fencooperite is a very rare barium silicate carbonate found in two California localities only. The Fencooperite on this specimen consist of 3 or 4 tiny 1mm grains. It really doesn't get much bigger.

Type Locality

Fencooperite

Formula
Ba6Fe3+3Si8O23(CO3)2Cl3·H2
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 

Data courtesy of Webmineral.

Special Info
Type Locality

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