AM_KFe3(AsO4)2(HAsO4)2
Formula: K Fe3 As4 O16 H2
Name: KFe3(AsO4)2(HAsO4)2
Unit cell: 18.975 6.585 10.955 90.0 100.42 90.0 , V=1346.26
Space group: C12/C1 (15)

Schwendtner K , Kolitsch U , European Journal of Mineralogy , 19 (2007) p.399-409, Two new structure types: KFe3(AsO4)2(HAsO4)2 and K(H2O)M3+(H1.5AsO4)2(H2AsO4), (M3+ = Fe, Ga, In) - synthesis, crystal structure and spectroscopy