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Zwieselite

Type Locality
Birkhöhe Quarry (Birkenhöhe Quarry), Zwiesel, Lower Bavaria, Bavaria, Germany
Mineral Data
(Fe2+,Mn2+)2(PO4)F
Strunz: 
8.BB.10
Physical Properties
Crystal System: 
Monoclinic
Hardness: 
5.0 - 5.5
Tenacity: 
brittle