AM_Serpierite Formula: Ca (Cu2.64 Zn1.36) S2 O17 H12 Name: Serpierite Unit cell: 22.186 6.25 21.853 90.0 113.36 90.0 , V=2781.81 Space group: C12/C1 (15)

Sabelli C , Zanazzi P F , Acta Crystallographica, Section B , 24 (1968) p.1214-1221, The crystal structure of serpierite, Locality: Laurion mine, Greece