Information card for entry 9000843

Structure parameters

• Mineral name: Biotite
• Formula: Al1.322 Fe0.864 K Mg1.638 O12 Si2.84 Ti0.336
• Calculated formula: Al1.322 Fe0.864 K Mg1.638 O12 Si2.84 Ti0.336
• Title of publication: Mica polytypism: Similarities in the crystal structures of coexisting 1M and 2M(1) oxybiotite Sample: in the 2M1 setting
• Authors of publication: Ohta, T.; Takeda, H.; Takeuchi, Y.
• Journal of publication: American Mineralogist
• Year of publication: 1982
• Journal volume: 67
• Pages of publication: 298 - 310
• a: 5.3175 Å
• b: 9.212 Å
• c: 19.976 Å
• α: 90°
• β: 95.09°
• γ: 90°
• Cell volume: 974.662 ų
• Number of distinct elements: 7
• Space group number: 15
• Hermann-Mauguin space group symbol: C 1 2/c 1
• Hall space group symbol: -C 2yc
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No