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Manganogrunerite
Type Locality
Dannemora mine, Dannemora, Östhammar, Uppland, Sweden
Mineral Data
☐{Mn
2+
2
}{Fe
2+
5
}(Si
8
O
22
)(OH)
2
Strunz:
9.DE.05
Physical Properties
Colour:
nd
Crystal System:
Monoclinic
Streak:
nd
Hardness:
5.0 - 6.0
Synonyms
Synonyms:
Dannemorite and Silfbergite
