Information card for entry 2013919

Structure parameters

• Common name: trioctahedral mica
• Chemical name: potassium triiron(II) aluminasilaferrate(III) decaoxide dihydroxide
• Formula: Al0.24 Fe3.76 H2 K O12 Si3
• Calculated formula: Al0.236 Fe3.764 H2 K O12 Si3
• Title of publication: The ferri-annite KFe^2+^~3~(Al~0.26~Fe^3+^~0.76~Si~3~)O~10~(OH)~2~ at 100 and 270 K
• Authors of publication: Redhammer, Günther J.; Roth, G.
• Journal of publication: Acta Crystallographica, Section C
• Year of publication: 2004
• Journal volume: 60
• Pages of publication: i33 - i36
• a: 5.4106 ± 0.0013 Å
• b: 9.3709 ± 0.0016 Å
• c: 10.293 ± 0.003 Å
• α: 90°
• β: 100.03 ± 0.02°
• γ: 90°
• Cell volume: 513.9 ± 0.2 ų
• Cell temperature: 100 ± 1 K
• Ambient diffraction temperature: 100 ± 1 K
• Number of distinct elements: 6
• Space group number: 12
• Hermann-Mauguin space group symbol: C 1 2/m 1
• Hall space group symbol: -C 2y
• Residual factor for significantly intense reflections: 0.0191
• Weighted residual factors for all reflections included in the refinement: 0.0523
• Goodness-of-fit parameter for all reflections included in the refinement: 1.09
• Diffraction radiation wavelength: 0.71073 Å
• Diffraction radiation type: MoKα
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No