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Cacoxenite & Chalcosiderite

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CR192617

Cacoxenite & Chalcosiderite

Description Tabs

Description
Locality: 
Miguel Vacas Mine, Conceição, Vila Viçosa, Évora District, Portugal
Size Range: 
Miniature (4.5-7 cm)
Size: 
6.5 × 4.5 × 3.8 cm
Description

Very rich specimen of golden yellow cacoxenite with green chalcosiderite crystals all over the black shist matrix.

Beautiful specimen - especially under a lense or microscope - collected 1991

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

Chalcosiderite

Formula: 
Cu(Fe3+,Al)6(PO4)4(OH)8·4H2O
Strunz: 
8.DD.15
Crystal System: 
Triclinic
Hardness: 
4.5
Type Locality: 
Phoenix United Mine, Minions, Linkinhorne, Liskeard District, Cornwall, England, UK