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Cacoxenite Beraunite & Rockbridgeite

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CLB124028

Cacoxenite Beraunite & Rockbridgeite

from my personal collection
Classic Locality

Description Tabs

Description
Locality: 
Mark Mine, Weinbach, Limburg-Weilburg, Giessen Region, Hesse, Germany
Size Range: 
Miniature (4.5-7 cm)
Size: 
5 × 4.7 × 2.5 cm
Description

Red-brown beraunite and botryoidal, dark green to black rockbridgeite (maybe dufrénite?) plus very tiny straw-yellow balls of cacoxenite (too small to photograph better).

Mineral Data
What's on the rock

Cacoxenite

Formula: 
Fe3+24Al(PO4)17O6(OH)12·17H2O
Strunz: 
8.DC.40
Hardness: 
3.0 - 4.0
Type Locality: 
Hrbek Mine, Svatá Dobrotivá (St Benigna), Beroun (Beraun), Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic

Beraunite

Formula: 
Fe2+Fe3+5(PO4)4(OH)5·6H2O
Group Parent: 
Beraunite Group
Strunz: 
8.DC.27
Crystal System: 
Monoclinic
Hardness: 
3.0 - 4.0
Type Locality: 
Hrbek Mine, Svatá Dobrotivá (St Benigna), Beroun (Beraun), Central Bohemia Region, Bohemia (Böhmen; Boehmen), Czech Republic

Rockbridgeite

Formula: 
Fe2+Fe3+4(PO4)3(OH)5
Strunz: 
8.BC.10
Crystal System: 
Orthorhombic
Hardness: 
3.5 - 4.5
Type Locality: 
Midvale Mine, South Mountain, Midvale, Rockbridge Co., Virginia, USA

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