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Structural and vibrational study of diarsenate barium: Ba2As2O7

  • Structure of Inorganic Compounds
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Abstract

A new barium diarsenate with layer structure has been synthesized by solid-state method. The single crystal structure was solved and refined by X-ray diffraction. The crystal is triclinic, space group \(P\bar 1\), a = 7.384(2) Å, b = 7.402(2) Å, c = 13.318(2) Å; α = 93.69(2)°, β = 96.90(2)°, γ = 90.15(2)°, Z = 4 and V = 721.05(3) Å3. Its structure is composed of BaO8/BaO9 polyhedra and As2O7 bitetrahedral units of dichromate type. These groups are linked by corner and edge-sharing forming a three-dimensional framework. Two unique diarsenate groups are repeated by lattice translations to form layers. The As2O7 groups are eclipsed within As-O-As angle of 9.726° and 13.586°. The infrared and the Raman spectra of this compound are reported and discussed.

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Authors and Affiliations

  1. Laboratoire de L’état Solide, Faculté des Sciences, Université de Sfax, BPW 3038, Sfax, Tunisie

    F. Edhokkar, A. Hadrich & T. Mhiri

  2. Laboratoire de Matériaux et de Cristallochimie, Faculté des Sciences de Tunis, Université de Tunis-El Manar, 2092, El Manar II Tunis, Tunisie

    M. Graia

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  1. F. Edhokkar
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  2. A. Hadrich
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  3. T. Mhiri
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  4. M. Graia
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Correspondence to F. Edhokkar.

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Edhokkar, F., Hadrich, A., Mhiri, T. et al. Structural and vibrational study of diarsenate barium: Ba2As2O7 . Crystallogr. Rep. 59, 937–943 (2014). https://doi.org/10.1134/S1063774514070098

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  • DOI: https://doi.org/10.1134/S1063774514070098

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