Information card for entry 2009231

Structure parameters

• Common name: sodium calcium tantalate
• Chemical name: disodiumtricalciumditantalumnonaoxide
• Formula: Ca3 Na2 O9 Ta2
• Calculated formula: Ca3 Na2 O9 Ta2
• SMILES: [Ta]12([O-])(O[Ta]([O-])([O-])([O-])(O1)O2)([O-])[O-].[Ca+2].[Ca+2].[Ca+2].[Na+].[Na+]
• Title of publication: Na~2~Ca~3~Ta~2~O~9~ with a simple stacking of oxygen triangular nets
• Authors of publication: Yamane, Hisanori; Takahashi, Hiroki; Kajiwara, Takashi; Shimada, Masahiko
• Journal of publication: Acta Crystallographica Section C
• Year of publication: 1999
• Journal volume: 55
• Journal issue: 12
• Pages of publication: 1978 - 1980
• a: 5.6969 ± 0.0006 Å
• b: 5.6969 ± 0.0006 Å
• c: 23.523 ± 0.003 Å
• α: 90°
• β: 90°
• γ: 120°
• Cell volume: 661.15 ± 0.13 ų
• Cell temperature: 293 ± 2 K
• Ambient diffraction temperature: 293 ± 2 K
• Number of distinct elements: 4
• Space group number: 155
• Hermann-Mauguin space group symbol: R 3 2 :H
• Hall space group symbol: R 3 2"
• Residual factor for all reflections: 0.022
• Residual factor for significantly intense reflections: 0.021
• Weighted residual factors for all reflections included in the refinement: 0.057
• Goodness-of-fit parameter for all reflections included in the refinement: 1.187
• Diffraction radiation wavelength: 0.71073 Å
• Diffraction radiation type: MoKα
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No