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Crystal structure of Pb-exchanged form of zorite

  • Structure of Inorganic Compounds
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Abstract

The crystal structure of a Pb-exchanged form of zorite is studied by X-ray diffraction: Pb3.95(Ca0.1Sr0.05)[Ti(Ti0.80Nb0.20)4Si12O38(OH)] · 9.52H2O (sp. gr. Cmmm, R = 0.0530 for 680 independent reflections). The structure retains the mixed polyhedral framework of zorite, Na6[Ti(Ti,Nb)4(Si6O17)2(O,OH)5] · 11H2O. This framework is composed of xonotlite-like [Si6O17] ribbons linked to each other by columns of vertex-sharing (Ti,Nb)O6 octahedra and isolated TiO5 half-octahedra. Lead atoms in the Pb-exchanged form occupy one site, unlike Cs cations in the Cs-exchanged form of zorite, which are strongly disordered and partially occupy eight positions. The position of Pb2+ cations corresponds to the Na(2) position in the zorite structure, the Sr position in the Sr-exchanged form of ETS-4, and the K position in the K-exchanged form and is similar to the position of the water molecule W(3) in the structure of the Cs-exchanged form of zorite.

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Authors and Affiliations

  1. Faculty of Geology, Moscow State University, Vorob’evy gory, Moscow, 119992, Russia

    N. V. Zubkova, D. Yu. Pushcharovsky, I. V. Pekov & A. G. Turchkova

  2. Institute of Mineralogy and Crystallography, Geocenter, University of Vienna, Althanstrasse 14, A-1090, Vienna, Austria

    G. Giester & E. Tillmanns

  3. Institute of Problems of Chemical Physics, Russian Academy of Sciences, pr. Akademika Semenova 1, Chernogolovka, Moscow oblast, 142432, Russia

    N. V. Chukanov

Authors
  1. N. V. Zubkova
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  2. D. Yu. Pushcharovsky
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  3. G. Giester
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  4. I. V. Pekov
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  5. A. G. Turchkova
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  6. E. Tillmanns
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  7. N. V. Chukanov
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Original Russian Text © N.V. Zubkova, D.Yu. Pushcharovsky, G. Giester, I.V. Pekov, A.G. Turchkova, E. Tillmanns, N.V. Chukanov, 2006, published in Kristallografiya, 2006, Vol. 51, No. 3, pp. 413–416.

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Zubkova, N.V., Pushcharovsky, D.Y., Giester, G. et al. Crystal structure of Pb-exchanged form of zorite. Crystallogr. Rep. 51, 379–382 (2006). https://doi.org/10.1134/S1063774506030035

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  • DOI: https://doi.org/10.1134/S1063774506030035

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