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
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XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs
For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.