Information card for entry 8102903

Structure parameters

• Chemical name: octasodium europium(II) bis[hexaselenodigermanate(III)]
• Formula: Eu2 Ge4 Na8 Se12
• Calculated formula: Eu2 Ge4 Na8 Se12
• Title of publication: Crystal structures of octasodium dieuropium(II) bis[hexa-tellurodisilicate], Na~8~Eu~2~[Si~2~Te~6~]~2~, octasodium dieuro- pium(II) bis[hexaselenodigermanate], Na~8~Eu~2~[Ge~2~Se~6~]~2~, and nonasodium samarium(III) bis[hexaselenodisilicate], Na~9~Sm[Si~2~Se~6~]~2~
• Authors of publication: Knaust, J. M.; Polyakova, L. A.; Dorhout, P. K.
• Journal of publication: Zeitschrift für Kristallographie - New Crystal Structures
• Year of publication: 2005
• Journal volume: 220
• Journal issue: 3
• Pages of publication: 295 - 297
• a: 7.137 ± 0.002 Å
• b: 12.33 ± 0.004 Å
• c: 8.019 ± 0.003 Å
• α: 90°
• β: 107.279 ± 0.005°
• γ: 90°
• Cell volume: 673.8 ± 0.4 ų
• Cell temperature: 298 ± 2 K
• Ambient diffraction temperature: 298 ± 2 K
• Number of distinct elements: 4
• Space group number: 12
• Hermann-Mauguin space group symbol: C 1 2/m 1
• Hall space group symbol: -C 2y
• Residual factor for all reflections: 0.0448
• Residual factor for significantly intense reflections: 0.0343
• Weighted residual factors for significantly intense reflections: 0.0805
• Weighted residual factors for all reflections included in the refinement: 0.0868
• Goodness-of-fit parameter for all reflections included in the refinement: 1.027
• Diffraction radiation wavelength: 0.71073 Å
• Diffraction radiation type: MoKα
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No