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Dehydration-induced structural transformations of the microporous zirconosilicate elpidite

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Abstract

The structural transformations accompanying the thermal dehydration of natural elpidite, Na2ZrSi6O15 · 3H2O, have been studied by X-ray powder diffraction and IR spectroscopy. The crystal structures of both elpidite (a = 7.1136(1), b = 14.6764(2), c = 14.5977(2) Å; sp. Gr. Pbcm) and the dehydration product Na2ZrSi6O15 (a = 14.0899(1), b = 14.4983(1), c = 14.3490(1)Å; sp. gr. Cmce = Cmca) are based on a heteropolyhedral Si-Zr-O framework. The Na cations and (in hydrous elpidite) H2O molecules reside in extra-framework sites. The dehydration-induced distortion of the framework leads to a doubling of the a cell parameter, and the water loss is accompanied by a considerable decrease in molar volume.

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Authors and Affiliations

  1. Moscow State University, Moscow, 119899, Russia

    N. V. Zubkova, D. A. Ksenofontov, Yu. K. Kabalov, I. V. Pekov & D. Yu. Pushcharovsky

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

    N. V. Chukanov & V. V. Nedel’ko

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  1. N. V. Zubkova
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  2. D. A. Ksenofontov
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  3. Yu. K. Kabalov
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  4. N. V. Chukanov
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  5. V. V. Nedel’ko
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  6. I. V. Pekov
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  7. D. Yu. Pushcharovsky
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Correspondence to N. V. Zubkova.

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Original Russian Text © N.V. Zubkova, D.A. Ksenofontov, Yu.K. Kabalov, N.V. Chukanov, V.V. Nedel’ko, I.V. Pekov, D.Yu. Pushcharovsky, 2011, published in Neorganicheskie Materialy, 2011, Vol. 47, No. 5, pp. 575–581.

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Zubkova, N.V., Ksenofontov, D.A., Kabalov, Y.K. et al. Dehydration-induced structural transformations of the microporous zirconosilicate elpidite. Inorg Mater 47, 506–512 (2011). https://doi.org/10.1134/S0020168511050232

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  • DOI: https://doi.org/10.1134/S0020168511050232

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