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Liskeardite & Pharmacosiderite

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RPL845549

Liskeardite & Pharmacosiderite

Rare Mineral
Classic Locality

Description Tabs

Description
Locality: 
Penberthy Croft Mine, St Hilary, Cornwall, United Kingdom
Class: 
Crystals on Matrix
Size Range: 
Miniature (4.5-7 cm)
Size: 
6 × 5 × 3.5 cm
Largest Crystal: 
0.00cm
Weight: 
113.00gr
Description

White acicular and amorphous crusts of Liskeardite line small vugs on three sides, there are also small patches of crystalline iridescent pharmocosiderite.

Mineral Data
What's on the rock

Liskeardite

Formula: 
[(Al,Fe)32(AsO4)18(OH)42(H2O)22]·52H2O
Strunz: 
8.DF.10
Crystal System: 
Orthorhombic
Hardness: 
0.0
Type Locality: 
Marke Valley Mine, Upton Cross, Linkinhorne, Liskeard District, Cornwall, England, UK

Pharmacosiderite

Formula: 
KFe3+4(AsO4)3(OH)4·6-7H2O
Strunz: 
8.DK.10
Hardness: 
2.5
Streak: 
white
Type Locality: 
Carharrack Mine, St Day United Mines (Poldice Mines), Gwennap, Camborne - Redruth - St Day District, Cornwall, England, UK

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