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Phase formation in the ZrO(NO3)2-H3PO4-RbF-H2O system: the PO 3−4 /Zr = 0.5 section

  • Physicochemical Analysis of Inorganic Systems
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Abstract

We studied phase formation in the ZrO(NO3)2-H3PO4-RbF-H2O system along PO 3−4 /Zr = 0.5 (mol/mol) and RbF/Zr = 1–5 (mol/mol) sections with 2–10 wt % ZrO2 in the starting solution. We recovered amorphous rubidium oxofluorophosphatozirconate Rb2Zr3OF6(PO4)2 · 2H2O and the following fluorophosphatonitratozirconates: Rb2ZrF4(PO4)0.33NO3, which forms large cubic system crystals; weakly crystallized RbZr3OF3(PO4)2(NO3)2 · 5H2O; and amorphous Zr3OF3(PO4)2NO3 · (7–8) H2O. A shown by its IR spectrum, Rb2ZrF4(PO4)0.33NO3 contains NO3- and PO4 groups that are not coordinated to zirconium, meaning that this is a triple salt ZrF4 · Rb(PO4)0.33 · RbNO3. The formula units of the RbZr3OF3(PO4)2(NO3)2 · 5H2O and Zr3OF3(PO4)2NO3 · (7–8)H2O phases are only conventional. All compounds have been recovered for the first time.

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Authors and Affiliations

  1. Tananaev Institute of the Chemistry and Technology of Rare Elements and Minerals Raw Materials, Kola Research Center, Russian Academy of Sciences, ul. Fersmana 14, Apatity, Murmansk oblast, 184209, Russia

    M. M. Godneva, V. Ya. Kuznetsov, D. L. Motov, M. P. Rys’kina & O. A. Zalkind

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  1. M. M. Godneva
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  2. V. Ya. Kuznetsov
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  3. D. L. Motov
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  4. M. P. Rys’kina
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  5. O. A. Zalkind
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Original Russian Text © M.M. Godneva, V.Ya. Kuznetsov, D.L. Motov, M.P. Rys’kina, O.A. Zalkind, 2009, published in Zhurnal Neorganicheskoi Khimii, 2009, Vol. 54, No. 12, pp. 2086–2090.

This is hydroxo compound Zr(OH)2(NO3)2 · (H2O) 1.325 as judged from structural data [3, card 88–360].

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Godneva, M.M., Kuznetsov, V.Y., Motov, D.L. et al. Phase formation in the ZrO(NO3)2-H3PO4-RbF-H2O system: the PO 3−4 /Zr = 0.5 section. Russ. J. Inorg. Chem. 54, 2005–2009 (2009). https://doi.org/10.1134/S0036023609120286

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  • DOI: https://doi.org/10.1134/S0036023609120286

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