Biotite Ohta T, Takeda H, Takeuchi Y American Mineralogist 67 (1982) 298-310 Mica polytypism: Similarities in the crystal structures of coexisting 1M and 2M(1) oxybiotite Sample: in the 2M1 setting _database_code_amcsd 0000863 CELL PARAMETERS: 5.3183 9.2110 10.1050 90.000 100.090 90.000 SPACE GROUP: C2/m X-RAY WAVELENGTH: 1.541838 Cell Volume: 487.356 Density (g/cm3): 3.989 MAX. ABS. INTENSITY / VOLUME**2: 30.41708510 RIR: 2.483 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 8.89 100.00 9.9487 0 0 1 2 17.83 2.50 4.9744 0 0 2 2 19.27 3.80 4.6055 0 2 0 2 19.50 3.15 4.5520 1 1 0 4 20.18 3.62 4.4006 -1 1 1 4 24.41 10.29 3.6461 -1 1 2 4 26.37 12.56 3.3795 0 2 2 4 26.88 24.23 3.3162 0 0 3 2 28.53 15.93 3.1292 1 1 2 4 30.85 8.34 2.8987 -1 1 3 4 33.29 5.51 2.6912 0 2 3 4 34.25 6.16 2.6180 2 0 0 2 34.25 11.62 2.6177 -1 3 1 4 35.85 2.51 2.5049 1 1 3 4 35.85 7.97 2.5048 1 3 1 4 35.85 3.94 2.5046 -2 0 2 2 36.11 1.45 2.4872 0 0 4 2 37.01 4.81 2.4293 2 0 1 2 37.01 8.46 2.4288 -1 3 2 4 38.51 2.14 2.3376 -1 1 4 4 39.12 5.04 2.3028 0 4 0 2 39.24 9.94 2.2960 -2 2 1 4 39.60 8.48 2.2760 2 2 0 4 40.20 6.06 2.2434 0 4 1 4 41.02 2.09 2.2003 -2 2 2 4 41.25 1.24 2.1884 0 2 4 4 41.71 18.28 2.1656 2 0 2 2 41.72 36.23 2.1652 -1 3 3 4 45.59 5.63 1.9897 0 0 5 2 45.69 4.90 1.9855 1 3 3 4 45.70 2.52 1.9852 -2 0 4 2 46.33 1.87 1.9598 2 2 2 4 47.89 3.50 1.8994 2 0 3 2 47.90 7.27 1.8990 -1 3 4 4 48.11 1.62 1.8915 0 4 3 4 50.03 2.18 1.8230 -2 2 4 4 52.09 1.58 1.7559 2 2 3 4 54.10 1.55 1.6952 1 5 1 4 54.94 2.00 1.6712 2 4 1 4 55.22 3.02 1.6635 2 0 4 2 55.23 5.67 1.6632 -1 3 5 4 55.41 1.68 1.6581 0 0 6 2 55.97 1.62 1.6430 -3 1 3 4 57.15 1.17 1.6116 1 5 2 4 60.28 9.11 1.5352 -3 3 1 4 60.29 4.40 1.5352 0 6 0 2 60.64 6.46 1.5272 1 3 5 4 60.65 3.24 1.5269 -2 0 6 2 61.07 3.09 1.5173 3 3 0 4 61.08 3.26 1.5172 -3 3 2 4 61.08 3.02 1.5172 0 6 1 4 61.60 1.00 1.5056 0 4 5 4 63.40 1.22 1.4670 3 3 1 4 63.41 1.14 1.4669 0 6 2 4 63.41 1.34 1.4669 -3 3 3 4 63.50 1.18 1.4650 -1 3 6 4 67.02 1.18 1.3963 2 2 5 4 69.50 5.50 1.3525 1 3 6 4 69.51 2.87 1.3523 -2 0 7 2 69.91 1.05 1.3456 0 4 6 4 70.96 1.67 1.3282 -2 6 1 4 71.20 1.43 1.3243 -4 0 2 2 71.20 3.00 1.3243 2 6 0 4 72.89 1.74 1.2977 2 6 1 4 72.90 1.44 1.2976 -2 2 7 4 75.98 1.36 1.2525 2 2 6 4 76.22 1.10 1.2490 -1 7 2 4 77.09 1.18 1.2372 -3 5 3 4 80.43 2.10 1.1939 2 6 3 4 80.45 1.07 1.1938 -4 0 5 2 86.21 1.81 1.1282 2 6 4 4 86.22 1.02 1.1280 -4 0 6 2 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.