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Crystal Structure of (H3O)2[(UO2)2(SO4)3(H2O)] · 6.86H2O, a New Hydroxonium Diuranyltrisulfate Aqua Complex

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Abstract

Single crystals of earlier unknown hydroxonium monoaquatrisulfatodiuranylate 6.86-hydrate (H3O)2[(UO2)2(SO4)3(H2O)] · 6.86H2O (I) have been synthesized via the evaporation of an aqueous [UO2(NO3)2(H2O)2] · nH2O (n = 2, 4) solution containing sulfuric and nitric acids in air at room temperature. The structure of complex I has been studied by X-ray diffraction. Crystals are monoclinic, а = 15.0903(12) Å, b = 9.9191(8) Å, c = 15.6099(13) Å, β = 112.560(1)°, space group P21/n, Z = 4, V = 2157.7(3) Å3. The complex is formed due to electrostatic attraction forces between counterions and stabilized by hydrogen bonds. Its main structural element is the [(UO2)2(SO4)3H2O] 2-n framework. The structure contains two types of uranium atoms surrounded by oxygen atoms according to a pentagonal bipyramid motif. The coordination polyhedra of all the three crystallographically different S atoms are SO 2-4 tetrahedra. The U(1) atom in the equatorial bipyramid plane is monodentately bonded to the oxygen atoms of five SO 2-4 tetrahedra, while the U(2) atom is monodentately coordinated to four sulfate groups and one water molecule.

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Authors and Affiliations

  1. Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Moscow, 119991, Russia

    L. B. Sveshnikova, M. D. Surazhskaya, Yu. N. Mikhailov & A. V. Churakov

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  1. L. B. Sveshnikova
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  2. M. D. Surazhskaya
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  3. Yu. N. Mikhailov
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  4. A. V. Churakov
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Correspondence to L. B. Sveshnikova.

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Original Russian Text © L.B. Sveshnikova, M.D. Surazhskaya, Yu.N. Mikhailov, A.V. Churakov, 2018, published in Zhurnal Neorganicheskoi Khimii, 2018, Vol. 63, No. 5, pp. 566–572.

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Sveshnikova, L.B., Surazhskaya, M.D., Mikhailov, Y.N. et al. Crystal Structure of (H3O)2[(UO2)2(SO4)3(H2O)] · 6.86H2O, a New Hydroxonium Diuranyltrisulfate Aqua Complex. Russ. J. Inorg. Chem. 63, 597–603 (2018). https://doi.org/10.1134/S0036023618050078

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  • DOI: https://doi.org/10.1134/S0036023618050078

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