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Kastningite

Type Locality
Silbergrube, Waidhaus, Upper Palatinate, Bavaria, Germany
Mineral Data
(Mn2+,Fe2+,Mg)Al2(PO4)2(OH)2·8H2O
Strunz: 
8.DC.30
Physical Properties
Crystal System: 
Triclinic
Streak: 
White
Hardness: 
1.0 - 2.0
Tenacity: 
brittle