AM_Prosperite Formula: Ca2 Zn4 As4 O17 H2 Name: Prosperite Unit cell: 19.238 7.731 9.765 90.0 104.47 90.0 , V=1406.27 Space group: C12/C1 (15)

Keller P , Riffel H , Hess H , Zeitschrift fur Kristallographie , 158 (1982) p.33-42, Die kristallstruktur von prosperit, Ca2Zn4[H2O|(AsO4)4], Locality: Tsumeb, Nambia