Journal
RADIOCHEMISTRY
Volume 54, Issue 1, Pages 43-47Publisher
PLEIADES PUBLISHING INC
DOI: 10.1134/S1066362212010055
Keywords
potassium uranyl selenates; uranium; selenates; single crystal X-ray diffraction
Funding
- Presidium of the Russian Academy of Sciences Foundations of Basic Research in the Field of Nanotechnologies and Materials,
- St. Petersburg State University [3.37.84.2011]
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Single crystals of a new uranyl selenate, K(H5O2)[(UO2)(2)(SeO4)(3)(H2O)] (I), were prepared by isothermal evaporation at room temperature. The crystal structure of I was solved by the direct method (space group P2(1)/c; a = 11.456(2), b = 10.231(1), c = 14.809(2) angstrom; beta = 101.901(4)degrees, V = 1698.4(4) angstrom(3); Z = 4) and refined to R-1 = 0.0547 (wR(2) = 0.0825) for 3375 reflections with vertical bar F-o vertical bar >= 4 sigma(F). The structure of I is based on layers of the composition [(UO2)(2)(SeO4)(3)(H2O)](2-). The charge of the inorganic layer is compensated by potassium and oxonium ions located in the interlayer space. Each potassium ion is coordinated by seven oxygen atoms belonging to uranyl selenate layers, including uranyl oxygen atoms, which leads to bending of uranyl selenate structural elements.
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