Information card for entry 2019918

Structure parameters

• Chemical name: Barium copper diarsenic heptaoxide
• Formula: As2 Ba Cu O7
• Calculated formula: As2 Ba Cu O7
• Title of publication: An investigation of polyhedral deformation in two mixed-metal diarsenates: SrZnAs~2~O~7~ and BaCuAs~2~O~7~
• Authors of publication: Kovač, Sabina; Karanović, Ljiljana; Dordević, Tamara
• Journal of publication: Acta Crystallographica Section C
• Year of publication: 2015
• Journal volume: 71
• Journal issue: 4
• Pages of publication: 330 - 337
• a: 5.7343 ± 0.0011 Å
• b: 8.4722 ± 0.0017 Å
• c: 13.071 ± 0.003 Å
• α: 90°
• β: 91.12 ± 0.03°
• γ: 90°
• Cell volume: 634.9 ± 0.2 ų
• Cell temperature: 298 ± 2 K
• Ambient diffraction temperature: 298 ± 2 K
• Number of distinct elements: 4
• Space group number: 14
• Hermann-Mauguin space group symbol: P 1 21/n 1
• Hall space group symbol: -P 2yn
• Residual factor for all reflections: 0.0265
• Residual factor for significantly intense reflections: 0.0247
• Weighted residual factors for significantly intense reflections: 0.0588
• Weighted residual factors for all reflections included in the refinement: 0.0594
• Goodness-of-fit parameter for all reflections included in the refinement: 1.204
• Diffraction radiation wavelength: 0.71073 Å
• Diffraction radiation type: MoKα
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: Yes