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Rosenbergite

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SKY678493

Rosenbergite

Type Locality

Description Tabs

Description
Locality: 
Le Cetine di Cotorniano Mine, Chiusdino, Siena Province, Tuscany, Italy
Class: 
Crystals on Matrix
Size Range: 
Thumbnail (1-3cm)
Size: 
1.8 × 1.5 × 0.8 cm
Description

Colorless radial crystals of the very rare rosenbergite, a mineral of simple but curious chemistry since it is an aluminuim fluoride, AlF3·3H2O.

Only 4 localities known worldwide, being this one from the type locality. 

Mineral Data
What's on the rock

Rosenbergite

Formula: 
AlF3·3H2O
Strunz: 
3.CD.05
Crystal System: 
Tetragonal
Hardness: 
3.0 - 3.5
Colour: 
Colorless
Streak: 
Colroless
Type Locality: 
Le Cetine di Cotorniano Mine (Le Cetine Mine; Cetine Mine; Rosia), Chiusdino, Siena Province, Tuscany, Italy

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