Mineral description : Asbeferrite (manganoan cummingtonite)

Picture pending, from Brunsjö mine.

Mineral class Silicates : Inosilicates : Cummingtonite anthophyllite group
Chemical formula (Fe,Mg,Mn)7Si8O22(OH)2
Crystal system Monoclinic
Habitus Fibric aggregates.
Cleavage  
Hardness  
Density  
Color Brownish.
Streak  
Luster Silky.
Description Could be seen as a manganoan cummingtonite or as an iron rich dannemorite.
Occurance  
Associates  
Notes  
Locations
  • Brunsjö mine, In the Grythytte area.

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axelsson@acc.umu.se
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Last changed : 2000-06-03