Owl - coll. P.P. ATHENA

MINERALOGY
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Mineral:PHARMACOSIDERITE
Formula:KFe3+4(AsO4)3(OH)4 · 6-7H2O
Crystal System:Cubic / Quadratic (Tetragonal)
Strunz Nr:7/D.47-20
Group:Pharmacosiderite Group
References:NJMM (1984), 183; HB4 (2000); L 9 (2009), 9
Type Locality:Carharrack mine and Tincroft mine, Cornwall, England

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