AM_Sainfeldite Formula: Ca5 As4 O20 H10 Name: Sainfeldite Unit cell: 18.781 9.82 10.191 90.0 97.02 90.0 , V=1865.43 Space group: C12/C1 (15)

Ferraris G , Abbona F , Bulletin de la Societe Francaise de Mineralogie et de Cristallographie , 95 (1972) p.33-41, The crystal structure of Ca5(HAsO4)2(AsO4)2*4H2O (Sainfeldite), Locality: synthetic