Geology of Ore Deposits

, Volume 51, Issue 8, pp 833–837 | Cite as

Crystal chemistry of selenates with mineral-like structures: VIII. Butlerite chains in the structure of K(UO2)(SeO4)(OH)(H2O)

  • V. V. Gurzhii
  • A. A. Bessonov
  • S. V. Krivovichev
  • I. G. Tananaev
  • T. Armbruster
  • B. F. Myasoedov
Mineralogical Crystallography

Abstract

A new potassium uranyl selenate compound K(UO2)(SeO4)(OH)(H2O) has been synthesized for the first time using the technique of evaporation from water solution. Its crystal structure has been solved by direct methods (monoclinic, P21/c,a = 8.0413(9) Å, b = 8.0362(9) Å, c = 11.6032(14) Å, β = 106.925(2)°, V = 717.34(14) Å3) and refined to R1 = 0.0319 (wR2 = 0.0824) for 1285 reflections with |F0| > 4σF. The structure consists of [(UO2(SeO4)(OH)(H2O)] chains extending along axis b. In the chains, the uranyl pentagonal bipyramids are linked via bridged hydroxyl anions and tetrahedral oxoanions [SeO4]2−. Potassium ions are situated between these chains. No chains of that type have been observed in uranyl compounds earlier, but they had been detected in the structures of butlerite, parabutlerite, uklonskovite, fibroferrite, and a number of synthetic compounds.

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Copyright information

© Pleiades Publishing, Ltd. 2009

Authors and Affiliations

  • V. V. Gurzhii
    • 1
  • A. A. Bessonov
    • 2
  • S. V. Krivovichev
    • 1
  • I. G. Tananaev
    • 2
  • T. Armbruster
    • 3
  • B. F. Myasoedov
    • 2
  1. 1.St. Petersburg State UniversitySt. PetersburgRussia
  2. 2.Frumkin Institute of Physical Chemistry and ElectrochemistryRussian Academy of SciencesMoscowRussia
  3. 3.University of BernBernSwitzerland

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