Information card for entry 9000844

Structure parameters

• Mineral name: Biotite
• Formula: Al3.3 Fe3.512 K2 Mg7.164 O48 Si5.68 Ti1.344
• Calculated formula: Al2.644 Fe1.728 K2 Mg3.276 O40 Si5.68 Ti0.672
• 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: 5.3183 Å
• b: 9.211 Å
• c: 10.105 Å
• α: 90°
• β: 100.09°
• γ: 90°
• Cell volume: 487.356 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