Information card for entry 8102904

Structure parameters

• Chemical name: nonasodium samarium(III) bis[hexaselenodisilicate(III)]
• Formula: Na9 Se12 Si4 Sm
• Calculated formula: Na9 Se12 Si4 Sm
• 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: 7.0109 ± 0.0013 Å
• b: 12.098 ± 0.002 Å
• c: 7.916 ± 0.0015 Å
• α: 90°
• β: 107.178 ± 0.003°
• γ: 90°
• Cell volume: 641.5 ± 0.2 ų
• Cell temperature: 173 ± 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: 0.0557
• Residual factor for significantly intense reflections: 0.0509
• Weighted residual factors for significantly intense reflections: 0.1156
• Weighted residual factors for all reflections included in the refinement: 0.1194
• Goodness-of-fit parameter for all reflections included in the refinement: 1.202
• Diffraction radiation wavelength: 0.71073 Å
• Diffraction radiation type: MoKα
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No