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Zaccagnaite Blatonite & Gypsum

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UMM1155869

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Description
Locality: 
Uranus Mine, Kleinrückerswalde, Annaberg-Buchholz, Erzgebirge, Saxony, Germany
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
2 × 2 × 2 cm
Description

This is the rather rare mineral zaccagnaite. It is found on a matrix of gneiss. The minerals blatonite and gypsum are also present on the specimen. Zaccagnaite is formed in tiny, white crystals.
In my opinion, this is the first confirmed evidence of this mineral in Germany.

Mineral Data
What's on the rock

Zaccagnaite

Formula: 
Zn4Al2(OH)12[CO3]·3H2O
Strunz: 
5.DA.45
Hardness: 
0.0
Colour: 
White
Streak: 
White
Type Locality: 
Calagio Quarry, Carrara, Apuan Alps, Massa-Carrara Province, Tuscany, Italy

Blatonite

Formula: 
(UO2)CO3·H2O
Strunz: 
5.EB.10
Crystal System: 
Hexagonal
Hardness: 
2.0 - 3.0
Streak: 
White
Type Locality: 
Jomac Mine, White Canyon, White Canyon District, San Juan Co., Utah, USA

Gypsum

Formula: 
CaSO4·2H2O
Strunz: 
7.CD.40
Hardness: 
2.0
Streak: 
White.

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Start 13 Dec 18:00
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Deutschland
5
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Weltweit
10

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