AM_Pharmacosiderite_2
Formula: As3 Fe4 O23 H18
Name: Pharmacosiderite
Unit cell: 7.94 7.94 7.94 90.0 90.0 90.0 , V=500.57
Space group: P-43M (215)

Zemann J , Experientia , 3 (1947) p.452-452, Uber die struktur des pharmakosiderits, Note: the K atom could not be located