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Phase formation in Li2MoO4-Rb2MoO4-MMoO4 (M = Ca, Sr, Ba, Pb) systems and the crystal structure of α-Rb2Pb(MoO4)2

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Abstract

A subsolidus triangulation of Li2MoO4-Rb2MoO4-MMoO4 (M = Ca, Sr, Pb, Ba) systems is performed. The RbLiMoO4-Rb2M(MoO4)2 (M = Pb, Ba) joins, where 11 mol.% long Rb2M(MoO4)2-based solid solutions are found, are studied in most detail. Ternary molybdates do not form in the systems, which is confirmed by spontaneous flux crystallization. The α-Rb2Pb(MoO4)2 crystals are obtained and their crystal structure is solved (a = 20.9724(15) Å, b = 12.1261(8) Å, c = 16.1171(10) Å, β = 115.728(13)°, C2/m space group, R = 0.0695, Z = 16), which is a monoclinic superstructure of the palmierite type and has the largest cell volume and the most complex structure among lead-containing palmierites. One of the MoO6 tetrahedra is orientationally disordered over two sites; lead atoms are shifted from the centers of their coordination polyhedra to one of their faces and have cn = 6–8; for rubidium cations cn = 10–12.

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Authors and Affiliations

  1. A. V. Nikolaev Institute of Inorganic Chemistry, Siberian Division, Russian Academy of Sciences, Novosibirsk, Russia

    I. A. Gudkova, Z. A. Solodovnikova, S. F. Solodovnikov, E. S. Zolotova & N. V. Kuratieva

  2. Novosibirsk State University, Novosibirsk, Russia

    S. F. Solodovnikov & N. V. Kuratieva

Authors
  1. I. A. Gudkova
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  2. Z. A. Solodovnikova
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  3. S. F. Solodovnikov
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  4. E. S. Zolotova
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  5. N. V. Kuratieva
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Corresponding author

Correspondence to Z. A. Solodovnikova.

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Original Russian Text Copyright © 2011 by I. A. Gudkova, Z. A. Solodovnikova, S. F. Solodovnikov, E. S. Zolotova, and N. V. Kuratieva

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Translated from Zhurnal Strukturnoi Khimii, Vol. 52, No. 6, pp. 1101–1107, November–December, 2011.

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Gudkova, I.A., Solodovnikova, Z.A., Solodovnikov, S.F. et al. Phase formation in Li2MoO4-Rb2MoO4-MMoO4 (M = Ca, Sr, Ba, Pb) systems and the crystal structure of α-Rb2Pb(MoO4)2 . J Struct Chem 52, 1063–1069 (2011). https://doi.org/10.1134/S0022476611060047

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  • DOI: https://doi.org/10.1134/S0022476611060047

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