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Walpurgite

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CLB145928

Walpurgite

ex coll. Gruber
Radioactive

Description Tabs

Description
Locality: 
Alt St Joseph Mine, Wittichen, Schenkenzell, Freiburg Region, Baden-Württemberg, Germany
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.6 × 4.3 × 4 cm
Description

Rich specimen with several very rare platy walpurgite crystals and crystal groups on matrix. This is a new find. Similar looking specimen are known from the Schmiedestollen dumps near Wittichen. I just learned that material from the 'Alt St. Joseph Mine' was dumped there too. So the original locality is here.

Mineral Data
What's on the rock

Walpurgite

Formula: 
(BiO)4(UO2)(AsO4)2·3H2O
Strunz: 
8.EA.05
Hardness: 
3.5
Type Locality: 
Walpurgis Flacher vein, Weißer Hirsch Mine (Shaft 3), Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany

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