AM_Piypite Formula: K4 Cu4.5 O18 S4 Cl Name: Piypite Unit cell: 13.6 13.6 4.98 90.0 90.0 90.0 , V=921.10 Space group: I141 (1)

Effenberger H , Zemann J , Mineralogical Magazine , 48 (1984) p.541-546, The crystal structure of caratiite, Locality: Mount Vesuvius, Naples, Italy