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Arsenocrandallite

Type Locality
Neubulach, Calw, Black Forest, Baden-Württemberg, Germany
Mineral Data
CaAl3(AsO4)2(OH)5·H2O
Strunz: 
8.BL.10
Physical Properties
Crystal System: 
Trigonal
Streak: 
white
Hardness: 
5.5
Tenacity: 
brittle