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Orschallite & Picropharmacolite

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RMM569239

Orschallite & Picropharmacolite

Analysed

Description Tabs

Description
Locality: 
Nipissing 404 Mine, Coleman Township, Cobalt, Timiskaming District, Ontario, Canada
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 1.7 × 2 cm
Description

This is a specimen of cubes of white orschallite in association with white fibrous picropharmacolite. We count five crystals in all, to 0.75 mm. 

The material was found in a boulder of deeply weathered dolomite from the upper portion of a silver vein. The predominant mineral in the boulder was white picropharmacolite as white acicular crystals to 0.5cm filling fractures and vugs in dolomite.

See the EDS pattern on the analysis tab.

Mineral Data
What's on the rock

Orschallite

Formula: 
Ca3(SO3)2(SO4)·12H2O
Strunz: 
4.JE.15
Crystal System: 
Trigonal
Hardness: 
4.0
Type Locality: 
Hannebacher Ley (Hannebacher Lay), Hannebach, Niederzissen, Eifel, Rhineland-Palatinate, 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
Analysis
Analysis Report - only: Orschallite & Picropharmacolite

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