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Walentaite

Type Locality
White Elephant Mine, Cicero Peak, Pringle, Custer District, Custer Co., South Dakota, USA
Mineral Data
H(Ca,Mn2+,Fe2+)Fe3+3(AsO4,PO4)4·7H2O
Strunz: 
8.CH.05
Physical Properties
Hardness: 
3.0