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Berthierine

Type Locality
Hayange, Meurthe-et-Moselle, Lorraine, France
Mineral Data
(Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4
Strunz: 
9.ED.15
Physical Properties
Crystal System: 
Monoclinic, Hexagonal
Hardness: 
2.5