Pharmacosiderite

As₃Fe₄H₂₀O₂₁

Buerger, M. J.Dollase, W. A.Garaycochea-Wittke I

Zeitschrift fur Kristallographie (1967) 125, 92-108

a=7.9816Å   b=7.9816Å   c=7.9816Å

α=90°   β=90°   γ=90°