Аннотация:The ionic liquid 1-ethyl-3-methylimidazolium diethyl phosphate (EMIM-Et2PO4) was used in the synthesis of four new hybrid organic-inorganic uranyl phosphates. The structure of (UO2)[PO2(OC2H5)(2)](2) (1) is triclinic, P-1, a = 5.374(3) angstrom, b = 7.674(4) angstrom, c = 11.132(6) angstrom, alpha = 105.333(6)degrees, beta = 90.562(6)degrees, gamma = 98.269(6)degrees, Z = 4. The structure of (C6N2H11){(UO2)(2)(NO3)(2)[PO2(OC2H5)(2)](3)) (2) is triclinic, P-1, a = 9.316(3) angstrom, b =11.890(4) angstrom, c = 18.477(7) angstrom, alpha = 91.197(4)degrees, beta = 102.993(4)degrees, gamma = 102.625(4)degrees, Z= 2. The structure of {(UO2)(H2O) [PO2(OC2H5)(2)](2)} (3) is monoclinic, P2(1)/c, a = 9.2005(7) angstrom, b = 10.1531(8) angstrom, c = 18.5968(14) angstrom, beta = 99.6447(9)degrees, Z = 4. The structure of (C6N2H11){(UO2)(2)[PO2(OC2H5)(2)](3)(PO3OC2H5)} (4) is monoclinic, C2/c, a = 36.048(10) angstrom, b = 13.553(4) angstrom, c 18.583(5) angstrom, beta = 119.454(3)degrees, Z = 8. The variable reactants, thermal conditions, and crystallization times resulted in diverse topologies unique to uranyl phosphate chain (1 and 2) and sheet (3 and 4) structures.