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Pharmacosiderite

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