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Ammoniojarosite & Clairite

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Ammoniojarosite & Clairite

Rare Mineral

Description Tabs

Description
Locality: 
Anna Mine, Alsdorf, Cologne, North Rhine - Westphalia, Germany
Size Range: 
Miniature (4.5-7 cm)
Size: 
4.5 × 3.5 × 1 cm
Description

Ammoniojarosite forms powdery-looking clusters, up to 1.5mm, consisting of bright yellow micro-crystals. There are also many small clairite crystals accompanying the ammoniojarosite.

 

 

Mineral Data
What's on the rock

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

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...
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