Cummingtonite
Yang H, Hirschmann M M
American Mineralogist 80 (1995) 916-922
Crystal structure of P2_1/m ferromagnesian amphibole and the role of cation
ordering and composition in the P2_1/m - C2/m transition in cummingtonite
Sample: 11a, heat treated at 600 C
_database_code_amcsd 0001753
CELL PARAMETERS: 9.5048 18.1343 5.3077 90.000 102.009 90.000
SPACE GROUP: P2_1/m
X-RAY WAVELENGTH: 1.541838
Cell Volume: 894.829
Density (g/cm3): 3.204
MAX. ABS. INTENSITY / VOLUME**2: 6.676615376
RIR: 0.679
RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
2-THETA INTENSITY D-SPACING H K L Multiplicity
9.75 58.68 9.0672 0 2 0 2
10.69 96.56 8.2730 1 1 0 4
17.08 12.16 5.1915 0 0 1 2
17.50 5.47 5.0677 1 3 0 4
18.42 22.02 4.8173 -1 1 1 4
19.09 1.28 4.6484 2 0 0 2
19.58 15.84 4.5336 0 4 0 2
19.71 3.02 4.5053 0 2 1 4
21.48 19.01 4.1365 2 2 0 4
21.83 6.54 4.0711 1 1 1 4
22.87 4.22 3.8884 -2 0 1 2
23.09 37.56 3.8513 -1 3 1 4
24.92 1.80 3.5736 -2 2 1 4
25.92 49.63 3.4368 1 3 1 4
26.09 4.69 3.4148 0 4 1 4
26.38 1.64 3.3788 1 5 0 4
27.48 55.56 3.2456 2 4 0 4
28.31 4.54 3.1524 2 0 1 2
29.24 82.34 3.0546 3 1 0 4
29.56 3.08 3.0224 0 6 0 2
30.01 42.32 2.9776 2 2 1 4
30.28 2.94 2.9515 -2 4 1 4
30.45 7.99 2.9352 -1 5 1 4
30.77 1.37 2.9061 -3 1 1 4
32.47 14.72 2.7577 3 3 0 4
32.70 100.00 2.7388 1 5 1 4
33.87 9.74 2.6469 -3 3 1 4
34.24 4.60 2.6191 -1 1 2 4
34.33 48.22 2.6120 0 6 1 4
34.55 3.10 2.5958 0 0 2 2
35.43 4.71 2.5339 2 6 0 4
35.95 67.20 2.4984 -2 0 2 2
35.99 2.32 2.4955 0 2 2 4
36.70 1.05 2.4488 1 6 1 4
37.33 1.95 2.4086 -2 2 2 4
37.70 2.63 2.3863 -2 6 1 4
38.20 3.76 2.3560 3 5 0 4
39.17 8.91 2.2999 -1 7 1 4
39.42 23.53 2.2858 -3 5 1 4
39.77 2.32 2.2668 0 8 0 2
40.32 13.53 2.2366 -4 2 1 4
40.74 15.69 2.2148 -3 1 2 4
40.99 12.56 2.2017 1 7 1 4
41.26 3.38 2.1881 -2 4 2 4
41.39 48.13 2.1817 2 6 1 4
43.22 2.95 2.0935 -3 3 2 4
43.32 22.17 2.0889 2 0 2 2
43.57 3.07 2.0774 0 8 1 4
43.77 1.56 2.0682 4 4 0 4
44.47 3.81 2.0374 2 8 0 4
44.51 1.45 2.0356 2 2 2 4
44.68 12.58 2.0281 3 5 1 4
45.64 2.49 1.9876 3 7 0 4
45.65 1.64 1.9871 1 5 2 4
45.98 1.38 1.9737 4 0 1 2
46.09 3.03 1.9692 1 9 0 4
46.09 1.33 1.9692 0 6 2 4
46.37 1.63 1.9583 -2 8 1 4
46.70 5.08 1.9449 -3 7 1 4
46.72 11.25 1.9442 -4 0 2 2
47.85 2.42 1.9010 -4 2 2 4
47.86 2.28 1.9006 -3 5 2 4
48.73 8.04 1.8687 -1 9 1 4
49.26 3.84 1.8497 5 1 0 4
49.47 1.85 1.8424 4 6 0 4
49.53 2.00 1.8404 2 8 1 4
49.70 1.99 1.8343 -4 6 1 4
50.27 2.29 1.8149 1 9 1 4
51.12 10.37 1.7868 -4 4 2 4
51.42 2.32 1.7772 5 3 0 4
53.31 1.01 1.7184 2 6 2 4
53.48 2.52 1.7134 -2 2 3 4
53.68 6.01 1.7074 0 8 2 4
53.94 2.92 1.6998 0 2 3 4
54.02 7.40 1.6976 -1 3 3 4
54.25 1.17 1.6908 -3 7 2 4
54.64 10.59 1.6796 -5 1 2 4
54.67 3.21 1.6788 -2 8 2 4
55.04 3.90 1.6684 -5 5 1 4
55.24 1.06 1.6628 -3 9 1 4
55.62 37.72 1.6525 4 6 1 4
56.71 12.73 1.6232 1 11 0 4
56.73 2.38 1.6228 4 8 0 4
58.01 23.75 1.5898 -1 5 3 4
58.56 5.70 1.5762 4 0 2 2
58.74 5.04 1.5719 2 10 1 4
59.53 1.38 1.5529 4 2 2 4
59.67 6.53 1.5495 6 0 0 2
60.23 2.34 1.5366 1 9 2 4
61.35 17.12 1.5112 0 12 0 2
61.35 16.51 1.5111 -2 6 3 4
61.77 6.81 1.5018 0 6 3 4
61.93 3.36 1.4982 5 5 1 4
62.37 5.83 1.4888 4 4 2 4
62.38 1.54 1.4885 4 8 1 4
62.99 2.09 1.4757 -4 8 2 4
63.16 6.71 1.4721 -6 0 2 2
63.71 6.13 1.4608 -1 7 3 4
63.97 4.66 1.4554 3 11 0 4
65.46 3.25 1.4259 -4 10 1 4
66.86 1.92 1.3993 -1 11 2 4
66.91 36.59 1.3984 -6 6 1 4
67.36 1.53 1.3901 6 2 1 4
67.92 6.15 1.3801 -4 6 3 4
68.06 12.06 1.3776 5 1 2 4
69.12 6.79 1.3591 2 6 3 4
69.39 4.75 1.3544 1 11 2 4
69.83 2.69 1.3469 5 3 2 4
70.89 1.59 1.3293 -1 9 3 4
71.10 1.80 1.3260 -3 11 2 4
71.18 2.25 1.3247 -5 5 3 4
71.19 2.95 1.3246 7 1 0 4
71.25 1.20 1.3234 -6 6 2 4
71.26 1.19 1.3234 -2 0 4 2
71.46 2.53 1.3202 -1 1 4 4
72.36 3.45 1.3060 0 12 2 4
72.88 9.84 1.2979 0 0 4 2
73.08 1.08 1.2948 -6 8 1 4
73.17 1.06 1.2935 -7 1 2 4
73.17 2.10 1.2934 -5 9 2 4
73.20 19.47 1.2931 -2 12 2 4
73.86 1.12 1.2831 -6 2 3 4
74.72 3.20 1.2704 -2 4 4 4
74.73 3.22 1.2703 -7 5 1 4
74.89 1.72 1.2680 -7 3 2 4
74.96 2.57 1.2669 4 12 0 4
75.63 1.24 1.2573 -2 10 3 4
75.78 1.71 1.2552 4 2 3 4
76.02 1.01 1.2519 0 10 3 4
76.21 3.57 1.2492 -4 0 4 2
78.05 3.32 1.2244 2 12 2 4
78.14 1.71 1.2232 6 0 2 2
80.10 1.03 1.1981 2 14 1 4
80.50 2.01 1.1931 -4 12 2 4
80.95 2.83 1.1877 2 0 4 2
81.67 9.03 1.1790 -5 11 2 4
81.76 1.05 1.1779 -8 2 1 4
83.12 1.81 1.1621 8 0 0 2
83.19 1.63 1.1613 1 15 1 4
87.40 1.15 1.1158 5 13 0 4
87.41 1.18 1.1158 -6 0 4 2
87.48 3.03 1.1151 3 1 4 4
88.09 1.99 1.1089 7 9 0 4
88.43 1.08 1.1055 3 13 2 4
89.94 4.59 1.0908 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.