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Rösslerite & Picropharmacolite

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JYJ82705

Rösslerite & Picropharmacolite

ex. R. Feigl
Rare Mineral

Description Tabs

Description
Locality: 
Jáchymov, Krušné Hory, Karlovy Vary Region, Czech Republic
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3 × 2.5 × 1.4 cm
Description

Sharp translucent crystals of the Mg-arsenate rösslerite in paragenesis with picropharmacolite.

Mineral Data
What's on the rock

Rösslerite

Formula: 
Mg(HAsO4)·7H2O
Strunz: 
8.CE.20
Crystal System: 
Monoclinic Fibrous crusts
Hardness: 
2.0 - 3.0
Streak: 
White
Type Locality: 
"Im Lochborn" Copper mine, Bieber, Gelnhausen, Spessart, Hesse, Germany...

Picropharmacolite

Formula: 
Ca4Mg(AsO4)2(HAsO4)2·11H2O
Strunz: 
8.CH.15
Crystal System: 
Monoclinic Needles and encrustations
Hardness: 
1.0 - 2.0
Streak: 
White
Type Locality: 
Ore dumps, Richelsdorf Smelter, Süss, Richelsdorf District, Hesse, Germany