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Guérinite Weilite & Sainfeldite

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CR905538

Guérinite Weilite & Sainfeldite

Rare Mineral

Description Tabs

Description
Locality: 
Bauhaus, Nentershausen, Hersfeld-Rotenburg, Kassel Region, Hesse, Germany
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 3 × 2 cm
Description

This is a fantastic old specimen of three rare minerals from a classic locale in Germany.

Beautiful silky white guerinite crystals with pink sainfeldite and milky white weilite (picture 5 and 6) very rich on all sides of the specimen.

With pink erythrite and minor picropharmacolite sprays.

Collected in the early 1980.

PXRD analysed

Mineral Data
What's on the rock

Guérinite

Formula: 
Ca5(AsO4)2(HAsO4)2·9H2O
Strunz: 
8.CJ.75
Crystal System: 
Monoclinic
Hardness: 
1.5
Colour: 
Colorless
Streak: 
White
Type Locality: 
Daniel Mine (St. Daniel Mine), Neustädtel, Schneeberg District, Erzgebirge, Saxony, Germany

Weilite

Formula: 
Ca(HAsO4)
Strunz: 
8.AD.10
Hardness: 
0.0
Colour: 
White
Streak: 
white
Type Locality: 
Schneeberg District, Erzgebirge, Saxony, Germany

Sainfeldite

Formula: 
CaCa2Ca2(AsO4)2(HAsO4)2·4H2O
Strunz: 
8.CB.10
Crystal System: 
Monoclinic
Hardness: 
4.0
Streak: 
White
Type Locality: 
Gabe Gottes Mine (incl. Giftgrube), Neuenberg, Ste Marie-aux-Mines (Markirch), Haut-Rhin, Alsace, France
Analysis
Analysis Report - only: Guérinite Weilite & Sainfeldite