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Rankachite

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SYA602350

Rankachite

Type Locality

Description Tabs

Description
Locality: 
Clara Mine, Oberwolfach, Freiburg Region, Baden-Württemberg, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1 × 1 × 0.8 cm
Description

A small but very nice, sea urchin-like aggregate of acicular brown-black  rankachite crystals in a vug.

Mineral Data
What's on the rock

Rankachite

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

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