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Römerite

Type Locality
Rammelsberg Mine, Rammelsberg, Goslar, Harz, Lower Saxony, Germany
Mineral Data
Fe2+Fe3+2(SO4)4·14H2O
Strunz: 
7.CB.75
Physical Properties
Hardness: 
3.0 - 3.5
Synonyms
Synonyms: 
Roemerite and Romerite