Cummingtonite
Fischer K F
American Mineralogist 51 (1966) 814-818
A further refinement of the crystal structure of cummingtonite
(Mg,Fe)7(Si4O11)2(OH)2
_database_code_amcsd 0000145
CELL PARAMETERS: 9.5100 18.1900 5.3300 90.000 101.900 90.000
SPACE GROUP: C2/m
X-RAY WAVELENGTH: 1.541838
Cell Volume: 902.205
Density (g/cm3): 3.136
MAX. ABS. INTENSITY / VOLUME**2: 6.217544175
RIR: 0.646
RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
2-THETA INTENSITY D-SPACING H K L Multiplicity
9.72 68.65 9.0950 0 2 0 2
10.68 80.48 8.2845 1 1 0 4
17.00 14.78 5.2155 0 0 1 2
17.46 8.14 5.0801 1 3 0 4
18.36 24.36 4.8316 -1 1 1 4
19.52 15.50 4.5475 0 4 0 2
19.62 4.42 4.5244 0 2 1 4
21.45 22.18 4.1422 2 2 0 4
21.74 6.81 4.0882 1 1 1 4
22.84 5.38 3.8937 -2 0 1 2
23.02 42.02 3.8629 -1 3 1 4
25.82 50.61 3.4501 1 3 1 4
26.00 6.19 3.4276 0 4 1 4
26.30 1.26 3.3883 1 5 0 4
27.42 62.84 3.2522 2 4 0 4
28.21 5.60 3.1631 2 0 1 2
29.21 81.15 3.0577 3 1 0 4
29.46 3.86 3.0317 0 6 0 2
29.91 50.83 2.9875 2 2 1 4
30.22 4.13 2.9576 -2 4 1 4
30.36 10.51 2.9441 -1 5 1 4
30.74 1.53 2.9083 -3 1 1 4
32.42 13.84 2.7615 3 3 0 4
32.58 100.00 2.7486 1 5 1 4
33.83 10.57 2.6500 -3 3 1 4
34.10 3.97 2.6295 -1 1 2 4
34.21 50.52 2.6210 0 6 1 4
34.39 4.30 2.6077 0 0 2 2
34.54 1.44 2.5967 2 4 1 4
35.34 5.73 2.5400 2 6 0 4
35.82 2.97 2.5067 0 2 2 4
35.84 68.51 2.5058 -2 0 2 2
37.22 2.57 2.4158 -2 2 2 4
37.60 1.73 2.3921 -2 6 1 4
38.13 4.72 2.3604 3 5 0 4
39.01 1.04 2.3091 -4 0 1 2
39.05 12.08 2.3069 -1 7 1 4
39.35 24.55 2.2896 -3 5 1 4
39.64 3.31 2.2738 0 8 0 2
40.00 1.20 2.2538 4 2 0 4
40.30 16.93 2.2381 -4 2 1 4
40.63 1.39 2.2206 1 3 2 4
40.65 15.60 2.2194 -3 1 2 4
40.85 11.40 2.2092 1 7 1 4
41.13 5.09 2.1947 -2 4 2 4
41.25 47.88 2.1887 2 6 1 4
43.12 2.85 2.0979 -3 3 2 4
43.12 23.66 2.0978 2 0 2 2
43.42 3.44 2.0843 0 8 1 4
43.71 2.09 2.0711 4 4 0 4
44.31 1.75 2.0441 2 2 2 4
44.34 4.61 2.0429 2 8 0 4
44.55 13.06 2.0339 3 5 1 4
45.45 1.70 1.9954 1 5 2 4
45.54 3.22 1.9920 3 7 0 4
45.87 1.84 1.9783 4 0 1 2
45.90 1.78 1.9770 0 6 2 4
45.95 3.36 1.9751 1 9 0 4
46.24 1.66 1.9635 -2 8 1 4
46.60 4.70 1.9489 -3 7 1 4
46.66 11.56 1.9468 -4 0 2 2
47.05 1.11 1.9315 -2 6 2 4
47.74 2.89 1.9050 -3 5 2 4
47.78 2.93 1.9037 -4 2 2 4
48.57 10.43 1.8744 -1 9 1 4
49.21 5.00 1.8515 5 1 0 4
49.36 2.15 1.8462 2 8 1 4
49.38 2.24 1.8456 4 6 0 4
49.63 1.67 1.8370 -4 6 1 4
50.10 2.01 1.8209 1 9 1 4
51.03 11.23 1.7897 -4 4 2 4
51.35 2.90 1.7792 5 3 0 4
53.09 1.22 1.7251 2 6 2 4
53.27 3.07 1.7196 -2 2 3 4
53.47 6.91 1.7138 0 8 2 4
53.68 3.97 1.7076 0 2 3 4
53.77 7.84 1.7047 -1 3 3 4
54.11 1.51 1.6949 -3 7 2 4
54.49 3.29 1.6839 -2 8 2 4
54.59 10.27 1.6812 -5 1 2 4
54.98 3.51 1.6701 -5 5 1 4
55.10 1.00 1.6666 -3 9 1 4
55.46 38.93 1.6567 4 6 1 4
56.15 1.02 1.6381 -4 6 2 4
56.52 13.31 1.6281 1 11 0 4
56.60 2.37 1.6261 4 8 0 4
57.76 25.24 1.5962 -1 5 3 4
58.35 5.97 1.5815 4 0 2 2
58.54 5.62 1.5769 2 10 1 4
59.31 1.76 1.5581 4 2 2 4
59.61 6.74 1.5509 6 0 0 2
59.98 3.05 1.5423 1 9 2 4
61.11 18.01 1.5164 -2 6 3 4
61.14 17.79 1.5158 0 12 0 2
61.48 7.16 1.5081 0 6 3 4
61.78 3.42 1.5016 5 5 1 4
62.14 6.75 1.4938 4 4 2 4
62.20 1.75 1.4925 4 8 1 4
62.84 2.94 1.4788 -4 8 2 4
63.11 7.35 1.4731 -6 0 2 2
63.43 6.19 1.4664 -1 7 3 4
63.78 4.98 1.4592 3 11 0 4
64.63 1.00 1.4420 -3 11 1 4
65.30 3.93 1.4289 -4 10 1 4
66.61 1.79 1.4040 -1 11 2 4
66.83 39.12 1.3999 -6 6 1 4
67.22 1.92 1.3927 6 2 1 4
67.51 1.13 1.3874 -2 8 3 4
67.73 5.95 1.3835 -4 6 3 4
67.82 13.11 1.3818 5 1 2 4
68.78 7.55 1.3648 2 6 3 4
69.11 5.60 1.3592 1 11 2 4
69.59 2.86 1.3509 5 3 2 4
70.59 1.61 1.3342 -1 9 3 4
70.88 1.94 1.3296 -3 11 2 4
70.93 1.55 1.3287 -2 0 4 2
71.02 2.49 1.3273 -5 5 3 4
71.10 3.12 1.3259 -1 1 4 4
71.11 3.00 1.3258 7 1 0 4
71.16 1.42 1.3250 -6 6 2 4
72.07 4.12 1.3105 0 12 2 4
72.49 10.51 1.3039 0 0 4 2
72.83 1.03 1.2986 -1 3 4 4
72.94 21.85 1.2970 -2 12 2 4
72.97 1.29 1.2965 -6 8 1 4
73.02 2.42 1.2958 -5 9 2 4
73.12 1.25 1.2943 -7 1 2 4
73.55 1.06 1.2876 -3 9 3 4
73.74 1.38 1.2849 -6 2 3 4
73.98 1.05 1.2813 6 8 0 4
74.20 1.12 1.2780 6 6 1 4
74.23 1.30 1.2775 1 9 3 4
74.38 3.99 1.2754 -2 4 4 4
74.66 3.48 1.2713 -7 5 1 4
74.75 2.72 1.2700 4 12 0 4
74.83 1.93 1.2688 -7 3 2 4
75.33 1.43 1.2616 -2 10 3 4
75.43 2.22 1.2602 4 2 3 4
75.67 1.07 1.2568 0 10 3 4
75.95 4.41 1.2529 -4 0 4 2
77.73 3.19 1.2286 2 12 2 4
77.89 1.71 1.2265 6 0 2 2
79.80 1.26 1.2018 2 14 1 4
80.27 1.81 1.1960 -4 12 2 4
80.50 3.49 1.1932 2 0 4 2
81.47 10.16 1.1814 -5 11 2 4
81.71 1.24 1.1786 -8 2 1 4
82.87 1.97 1.1650 1 15 1 4
83.02 1.88 1.1632 8 0 0 2
85.38 1.07 1.1370 6 6 2 4
86.99 3.25 1.1200 3 1 4 4
87.15 1.47 1.1184 5 13 0 4
87.19 1.19 1.1180 -6 0 4 2
87.91 2.26 1.1107 7 9 0 4
88.05 1.36 1.1092 3 13 2 4
88.73 1.04 1.1026 5 5 3 4
89.57 5.11 1.0943 4 12 2 4
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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.