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Rankachite

Type Locality
Clara Mine, Rankach valley, Oberwolfach, Wolfach, Black Forest, Baden-Württemberg, Germany
Mineral Data
Ca0.5(V4+,V5+)(W6+,Fe3+)2O8(OH)·2H2O
Strunz: 
7.GB.25
Physical Properties
Crystal System: 
Orthorhombic
Hardness: 
2.5
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