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0 item @ $0.00  

Allactite

#38590

Allactite

#38590
Availability
Sold
Size
6 x 4 x 3 cm - Sm Cabinet 
Formula
Mn2+7(AsO4)2(OH)8 (RRUFF)
Locality
Långban, Filipstad, Värmland, Sweden
Tagged
arsenate

Excellent specimen of this rare manganese arsenate found in only a handful of worldwide localities including of course Franklin. There are exceptional crystals on this specimen some showing good terminations and prismatic faces. The whole blackened side I believe is Allactite with a bit of manganese crust. Originally from the Scalisi Collection.

Allactite

Formula
Mn2+7(AsO4)2(OH)8 
Crystal System
Monoclinic 
Cleavage
Good, None, None 
Luster
Vitreous - Greasy 
Color
brown red, greenish brown, purple red, pink 
Class
Monoclinic - Prismatic 
Hardness
4.5 

Data courtesy of Webmineral.

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