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 0000862 CELL PARAMETERS: 5.3175 9.2120 19.9760 90.000 95.090 90.000 SPACE GROUP: C2/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 974.662 Density (g/cm3): 3.071 MAX. ABS. INTENSITY / VOLUME**2: 13.42985525 RIR: 1.424 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 8.89 100.00 9.9486 0 0 2 2 19.33 7.60 4.5917 1 1 0 4 19.50 3.52 4.5514 -1 1 1 4 19.78 4.46 4.4873 0 2 1 4 21.93 1.49 4.0522 1 1 2 4 22.69 3.09 3.9189 -1 1 3 4 23.52 12.10 3.7832 0 2 3 4 24.41 4.53 3.6463 1 1 3 4 25.37 25.41 3.5113 -1 1 4 4 26.37 11.32 3.3796 0 2 4 4 26.89 39.80 3.3162 0 0 6 2 27.43 27.79 3.2516 1 1 4 4 28.53 6.08 3.1287 -1 1 5 4 29.67 19.41 3.0112 0 2 5 4 30.85 5.73 2.8989 1 1 5 4 32.05 9.85 2.7922 -1 1 6 4 33.29 1.50 2.6912 0 2 6 4 33.84 3.81 2.6487 -1 3 1 4 33.85 2.03 2.6483 2 0 0 2 34.25 46.66 2.6179 1 3 1 4 34.26 22.99 2.6175 -2 0 2 2 34.56 3.97 2.5953 1 1 6 4 35.85 1.08 2.5046 -1 1 7 4 36.11 4.88 2.4872 0 0 8 2 37.01 26.75 2.4290 1 3 3 4 37.01 13.15 2.4287 -2 0 4 2 37.17 1.57 2.4189 0 2 7 4 39.15 1.56 2.3009 -2 2 1 4 39.39 2.55 2.2877 0 4 1 4 39.60 1.31 2.2757 -2 2 2 4 39.87 3.77 2.2610 2 2 1 4 39.96 6.68 2.2563 -1 3 5 4 39.96 3.31 2.2561 2 0 4 2 40.19 1.09 2.2437 0 4 2 4 40.58 3.91 2.2230 -2 2 3 4 41.02 1.37 2.2003 2 2 2 4 41.51 2.44 2.1756 0 4 3 4 41.71 20.84 2.1654 1 3 5 4 41.72 10.42 2.1652 -2 0 6 2 45.59 4.85 1.9897 0 0 10 2 45.70 9.83 1.9854 -1 3 7 4 45.70 4.73 1.9853 2 0 6 2 47.90 4.39 1.8991 1 3 7 4 47.90 2.15 1.8990 -2 0 8 2 53.74 1.15 1.7056 -2 4 3 4 54.50 2.58 1.6836 3 1 2 4 55.22 18.41 1.6633 1 3 9 4 55.23 9.00 1.6632 -2 0 10 2 55.41 1.46 1.6581 0 0 12 2 55.43 2.65 1.6577 -1 5 4 4 56.54 1.67 1.6278 1 5 4 4 56.54 2.03 1.6277 -2 4 5 4 57.82 1.42 1.5947 3 1 4 4 57.82 2.28 1.5947 -3 1 6 4 59.24 1.10 1.5597 -1 5 6 4 59.25 1.60 1.5596 2 4 5 4 60.28 9.77 1.5353 0 6 0 2 60.29 19.20 1.5351 -3 3 1 4 60.64 10.89 1.5271 -1 3 11 4 60.64 5.45 1.5270 2 0 10 2 61.07 2.79 1.5174 0 6 2 4 61.08 2.60 1.5172 3 3 1 4 61.08 2.73 1.5171 -3 3 3 4 63.50 1.82 1.4651 1 3 11 4 65.70 1.42 1.4212 0 0 14 2 69.50 9.02 1.3525 -1 3 13 4 69.50 4.43 1.3524 2 0 12 2 70.96 1.92 1.3283 2 6 0 4 71.20 6.05 1.3243 -2 6 2 4 71.21 3.00 1.3241 4 0 0 2 71.39 1.05 1.3213 -2 2 13 4 72.33 2.74 1.3065 0 6 8 4 72.33 2.65 1.3063 3 3 7 4 72.34 2.70 1.3063 -3 3 9 4 72.89 4.01 1.2978 -2 6 4 4 72.90 1.88 1.2976 4 0 2 2 74.43 1.51 1.2747 0 4 13 4 74.80 2.51 1.2693 2 6 4 4 74.81 1.20 1.2691 -4 0 6 2 76.62 1.22 1.2436 0 0 16 2 76.64 1.47 1.2433 -4 2 5 4 77.57 1.28 1.2307 1 7 4 4 77.58 1.43 1.2306 2 2 13 4 80.44 1.21 1.1939 -2 6 8 4 86.21 4.69 1.1281 -2 6 10 4 86.22 2.28 1.1280 4 0 8 2 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.