AM_Orthowalpurgite Formula: U Bi4 As2 O16 H4 Name: Orthowalpurgite Unit cell: 5.492 13.324 20.685 90.0 90.0 90.0 , V=1513.63 Space group: PBCM (57)

Krause W , Effenberger H , Brandstatter F , European Journal of Mineralogy , 7 (1995) p.1313-1324, Orthowalpurgite, (UO2)Bi4O4(AsO4)2.2H2O,, a new mineral from the Black Forest, Germany, Locality: Black Forest, Germany