Information card for entry 1000038

Structure parameters

• Chemical name: Potassium iron dimagnesium phyllo-alumotrisilicate dihydroxide
• Mineral name: Biotite
• Formula: Al Fe H2 K Mg2 O12 Si3
• Calculated formula: Al Fe H2 K Mg2 O12 Si3
• Title of publication: Crystal structure refinement of 1M plutonic biotites
• Authors of publication: Brigatti, M F; Davoli, P
• Journal of publication: American Mineralogist
• Year of publication: 1990
• Journal volume: 75
• Pages of publication: 305 - 313
• a: 5.345 ± 0.001 Å
• b: 9.258 ± 0.002 Å
• c: 10.222 ± 0.002 Å
• α: 90°
• β: 100.23 ± 0.02°
• γ: 90°
• Cell volume: 497.8 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
• Residual factor for all reflections: 0.021
• Has coordinates: Yes
• Has disorder: No
• Has Fobs: No