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Clairite & Ammoniojarosite

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FDW65418

Clairite & Ammoniojarosite

Rare Mineral

Description Tabs

Description
Locality: 
Anna Mine, Alsdorf, Cologne, North Rhine - Westphalia, Germany
Size Range: 
Small miniature (3-4.5 cm)
Size: 
3.5 × 3 × 2.5 cm
Description

Only a handful of localities for the rare clairite are left in the world. At the Anna Mine, clairite is found as well formed triclinic crystals.

This specimen carries hundreds of those microcrystals, accompanied by the also rare ammoniojarosite.

(AN030)

 

Mineral Data
What's on the rock

Clairite

Formula: 
(NH4)2Fe3(SO4)4(OH)3·3H2O
Strunz: 
7.DF.55
Hardness: 
0.0
Type Locality: 
Lone Creek Falls cave, Sabie, Pilgrim's Rest, Ehlanzeni District, Mpumalanga Province, South Africa...

Ammoniojarosite

Formula: 
(NH4)Fe3+3(SO4)2(OH)6
Strunz: 
7.BC.10
Crystal System: 
Trigonal
Hardness: 
3.5 - 4.5
Type Locality: 
Kaibab fault, Kane Co., Utah, USA
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