Three new uranyl sulfates, [pyH](H3O)[(UO2)3(SO4)4(H2O)2] (1), [pyH]2[(UO2)6(SO4)7(H2O)] (2), and [pyH]2[(UO2)2(SO4)3] (3), were produced upon hydrothermal treatment successive isothermal evaporation. 1 is monoclinic, P21/c, a = 14.3640(13), b 10.0910(9), c 18.8690(17) Å, β 107.795(2), V 2604.2(4) Å3, R1 0.038; 2 orthorhombic, C2221, 10.1992(8), 18.5215(14), 22.7187(17) 4291.7(6) 0.030; 3 Pccn,...