Information card for entry 2234381

Structure parameters

• Chemical name: trisodium tetraniobium triarsenic nonadecaoxide
• Formula: As3 Na3 Nb4 O19
• Calculated formula: As3 Na3.001 Nb4 O19
• Title of publication: Non-centrosymmetric Na~3~Nb~4~As~3~O~19~
• Authors of publication: Chérif, Saïda Fatma; Hizaoui, Khaled; Zid, Mohamed Faouzi; Driss, Ahmed
• Journal of publication: Acta Crystallographica Section E
• Year of publication: 2012
• Journal volume: 68
• Journal issue: 4
• Pages of publication: i25 - i26
• a: 13.014 ± 0.002 Å
• b: 24.17 ± 0.003 Å
• c: 5.088 ± 0.0009 Å
• α: 90°
• β: 90°
• γ: 90°
• Cell volume: 1600.4 ± 0.4 ų
• Cell temperature: 298 ± 2 K
• Ambient diffraction temperature: 298 ± 2 K
• Number of distinct elements: 4
• Space group number: 20
• Hermann-Mauguin space group symbol: C 2 2 21
• Hall space group symbol: C 2c 2
• Residual factor for all reflections: 0.0408
• Residual factor for significantly intense reflections: 0.0288
• Weighted residual factors for significantly intense reflections: 0.0712
• Weighted residual factors for all reflections included in the refinement: 0.0763
• Goodness-of-fit parameter for all reflections included in the refinement: 1.032
• Diffraction radiation wavelength: 0.71073 Å
• Diffraction radiation type: MoKα
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: Yes