Information card for entry 9000842

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
• 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: 5.3204 Å
• b: 9.21 Å
• c: 10.104 Å
• α: 90°
• β: 100.102°
• γ: 90°
• Cell volume: 487.429 ų
• Number of distinct elements: 7
• Space group number: 12
• Hermann-Mauguin space group symbol: C 1 2/m 1
• Hall space group symbol: -C 2y
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No