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Manganogrunerite - Razoare, Maramureș Co., Romania
(#:MINS9214)
Specimen with fibrous Manganogrunerite xls richly set on matrix. A very rare magnesium-iron-manganese Amphibole.
Formula :
☐{Mn2
2+
}{(Fe
2+
5
)(Si
8
O
22
)(OH)
2
System:
monoclinic
Hardness:
5-6
Rarity:
not common
Strunz id:VIII/F.7-30 - SILICATES
Name origin:
Formerly named dannemorite (1855) which was named after its locality. Renamed as manganogrunerite for its relationship to grunerite-
Specimen weight:48 gr.
Crystal size:up to 4 mm long
Overall size: 45mm x 42 mm x 30 mm
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