AM_Hallimondite Formula: U Pb2 As2 O10.29 H2 Name: Hallimondite Unit cell: 7.1153 10.478 6.8571 101.178 95.711 86.651 , V=498.64 Space group: P-1 (2)

Locock A J , Burns P C , Flynn T M , American Mineralogist , 90 (2005) p.240-246, The role of water in the structures of synthetic hallimondite, Pb2[(UO2)(AsO4)2](H2O)n, and synthetic parsonsite, Pb2[(UO2)(PO4)2](H2O)n, 0 < n < 0.5