Research output: Contribution to journal › Article › peer-review
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 and successive isothermal evaporation. 1 I s monoclinic, P21/c, a = 14.3640(13), β = 10.0910(9), c = 18.8690(17) Å, β = 107.795(2), V = 2604.2(4) Å3, R1 = 0.038; 2 is orthorhombic, C2221, a = 10.1992(8), β = 18.5215(14), c = 22.7187(17) Å, V = 4291.7(6) Å3, R1 = 0.030; 3 is orthorhombic, Pccn, a = 9.7998(8), β = 10.0768(8), c = 20.947(2) Å, V = 2068.5(3) Å3, R1 = 0.055. In the structures of 1 and 2, the uranium polyhedral and SO4 tetrahedra share vertices to form 3 ∞[(UO2)3(SO4)4(H2O)2]2- and 3 ¥[(UO2)6(SO4)7(H2O)]2- frameworks featuring channels (12.2 ± 6.7 Å in 1 and 12.9 ± 6.5 Å in 2), which are occupied by pyridinium cations. The structure of 3 is comprised of 2 ∞[(UO2)2(SO4)3]2- layers linked by hydrogen bonds donated by pyridinium cations. The compounds 1–3 are formed during recrystallization processes, in which the evaporation of mother liquor leads to a stepwise loss of hydration water.
| Original language | English |
|---|---|
| Article number | 5 |
| Pages (from-to) | 1-8 |
| Number of pages | 8 |
| Journal | ChemEngineering |
| Volume | 5 |
| Issue number | 1 |
| DOIs | |
| State | Published - 1 Mar 2021 |
ID: 74421717