Citation: Bullock, J.I.; Ladd, M.F.C.; Povey, D.C.; Storey, A.E. (1980). The chemistry of the trivalent actinoids. Part 7(1). Crystal structure analysis of (N H4) U (S O4)2 (H2 O)4 and comments on the structure of U2 (S O4)3 (H2 O)9. Inorganica Chimica Acta, 43, pp. 101-108.