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Unusual structural properties of (Na0.5La0.5)MoO4:Er,Ce crystals

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Abstract

The structure of single crystals grown by the Czochralski technique from (Na0.500La0.495 − x CexEr0.005)MoO4 (x = 0.10, 0.125, 0.15, 0.175, 0.20) melts in a weakly oxidizing atmosphere (99–99.5% N2 + 0.5–1% O2) (NLM-0) was studied by x-ray diffraction. Some of the crystals received short-term annealing at 1000°C (NLM-2) and/or long-term annealing at 700°C (NLM-1). The oxygen in the structure of NLM:Er,Ce-0 and NLM:Er,Ce-1 with x = 0.20 was found to occupy two crystallographic sites at random. In the structure of the NLM:Er,Ce-2 crystal with x = 0.20, the oxygen atoms are fully ordered into one site, as in the scheelite structure. It cannot be ruled out that these crystals contain both Ce3+ and Ce4+ ions.

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Authors and Affiliations

  1. Lomonosov State Academy of Fine Chemical Technology, pr. Vernadskogo 86, Moscow, 119571, Russia

    G. M. Kuz’micheva

  2. Moscow State University, Vorob’evy gory 1, Moscow, 119899, Russia

    V. B. Rybakov

  3. Mendeleev University of Chemical Technology, Miusskaya pl. 9, Moscow, 125820, Russia

    E. V. Zharikov

  4. Prokhorov Institute of General Physics, Russian Academy of Sciences, ul. Vavilova 38, Moscow, 119991, Russia

    D. A. Lis & K. A. Subbotin

Authors
  1. G. M. Kuz’micheva
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  2. V. B. Rybakov
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  3. E. V. Zharikov
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  4. D. A. Lis
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  5. K. A. Subbotin
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Additional information

Original Russian Text © G.M. Kuz’micheva, V.B. Rybakov, E.V. Zharikov, D.A. Lis, K.A. Subbotin, 2006, published in Neorganicheskie Materialy, 2006, Vol. 42, No. 3, pp. 349–356.

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Kuz’micheva, G.M., Rybakov, V.B., Zharikov, E.V. et al. Unusual structural properties of (Na0.5La0.5)MoO4:Er,Ce crystals. Inorg Mater 42, 303–309 (2006). https://doi.org/10.1134/S0020168506030162

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  • DOI: https://doi.org/10.1134/S0020168506030162

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