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: 1c, heat treated at 700 C
_database_code_amcsd 0001754
CELL PARAMETERS: 9.5057 18.1187 5.3059 90.000 102.031 90.000
SPACE GROUP: P2_1/m
X-RAY WAVELENGTH: 1.541838
Cell Volume: 893.768
Density (g/cm3): 3.190
MAX. ABS. INTENSITY / VOLUME**2: 6.624386211
RIR: 0.676
RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
2-THETA INTENSITY D-SPACING H K L Multiplicity
9.76 53.57 9.0594 0 2 0 2
10.70 97.93 8.2716 1 1 0 4
17.09 10.67 5.1894 0 0 1 2
17.51 5.32 5.0647 1 3 0 4
18.42 22.43 4.8163 -1 1 1 4
19.60 16.95 4.5297 0 4 0 2
19.72 2.42 4.5029 0 2 1 4
21.49 17.20 4.1358 2 2 0 4
21.84 6.45 4.0692 1 1 1 4
22.87 3.58 3.8886 -2 0 1 2
23.10 38.35 3.8496 -1 3 1 4
24.92 2.19 3.5734 -2 2 1 4
25.94 49.13 3.4348 1 3 1 4
26.11 3.96 3.4125 0 4 1 4
26.40 1.90 3.3763 1 5 0 4
27.49 53.88 3.2441 2 4 0 4
28.32 4.10 3.1513 2 0 1 2
29.24 83.01 3.0546 3 1 0 4
29.58 2.78 3.0198 0 6 0 2
30.02 40.97 2.9764 2 2 1 4
30.29 2.56 2.9505 -2 4 1 4
30.47 8.23 2.9334 -1 5 1 4
30.76 1.33 2.9064 -3 1 1 4
32.47 14.78 2.7572 3 3 0 4
32.72 100.00 2.7369 1 5 1 4
33.87 9.73 2.6467 -3 3 1 4
34.25 4.56 2.6183 -1 1 2 4
34.36 46.93 2.6100 0 6 1 4
34.57 3.41 2.5947 0 0 2 2
35.45 4.21 2.5323 2 6 0 4
35.95 66.68 2.4980 -2 0 2 2
36.01 1.99 2.4944 0 2 2 4
36.73 1.23 2.4470 1 6 1 4
37.34 1.77 2.4082 -2 2 2 4
37.72 2.31 2.3851 -2 6 1 4
38.21 3.68 2.3552 3 5 0 4
39.20 8.58 2.2983 -1 7 1 4
39.43 23.42 2.2852 -3 5 1 4
39.80 2.15 2.2648 0 8 0 2
40.32 13.05 2.2368 -4 2 1 4
40.42 1.17 2.2315 -3 0 2 2
40.74 15.74 2.2148 -3 1 2 4
41.02 12.81 2.2000 1 7 1 4
41.27 3.10 2.1874 -2 4 2 4
41.41 47.31 2.1803 2 6 1 4
43.22 2.95 2.0932 -3 3 2 4
43.34 21.77 2.0880 2 0 2 2
43.60 2.78 2.0758 0 8 1 4
43.78 1.38 2.0679 4 4 0 4
44.50 3.61 2.0360 2 8 0 4
44.53 1.24 2.0346 2 2 2 4
44.70 12.45 2.0272 3 5 1 4
45.67 2.45 1.9866 3 7 0 4
45.68 1.69 1.9860 1 5 2 4
45.99 1.25 1.9733 4 0 1 2
46.12 1.17 1.9680 0 6 2 4
46.13 2.89 1.9676 1 9 0 4
46.40 1.45 1.9571 -2 8 1 4
46.72 10.97 1.9443 -4 0 2 2
46.73 5.22 1.9440 -3 7 1 4
47.85 2.23 1.9010 -4 2 2 4
47.87 2.18 1.9001 -3 5 2 4
48.77 7.96 1.8673 -1 9 1 4
49.26 3.82 1.8497 5 1 0 4
49.49 1.67 1.8418 4 6 0 4
49.56 1.88 1.8391 2 8 1 4
49.72 1.93 1.8339 -4 6 1 4
50.32 2.36 1.8135 1 9 1 4
51.12 10.17 1.7867 -4 4 2 4
51.42 2.33 1.7771 5 3 0 4
53.50 2.39 1.7129 -2 2 3 4
53.72 5.83 1.7063 0 8 2 4
53.97 2.76 1.6991 0 2 3 4
54.04 7.32 1.6969 -1 3 3 4
54.28 1.10 1.6901 -3 7 2 4
54.64 10.70 1.6797 -5 1 2 4
54.70 3.30 1.6779 -2 8 2 4
55.05 3.82 1.6682 -5 5 1 4
55.28 1.10 1.6619 -3 9 1 4
55.64 37.19 1.6519 4 6 1 4
56.75 2.49 1.6221 4 8 0 4
56.76 12.55 1.6219 1 11 0 4
58.04 23.75 1.5891 -1 5 3 4
58.58 5.52 1.5757 4 0 2 2
58.79 4.95 1.5708 2 10 1 4
59.55 1.28 1.5524 4 2 2 4
59.67 6.40 1.5495 6 0 0 2
60.27 2.26 1.5355 1 9 2 4
60.69 1.00 1.5258 -1 6 3 4
61.38 16.23 1.5105 -2 6 3 4
61.40 16.97 1.5099 0 12 0 2
61.81 6.60 1.5010 0 6 3 4
61.95 3.36 1.4978 5 5 1 4
62.40 5.74 1.4882 4 4 2 4
62.42 1.47 1.4878 4 8 1 4
63.01 2.00 1.4753 -4 8 2 4
63.15 6.56 1.4723 -6 0 2 2
63.74 6.18 1.4600 -1 7 3 4
64.02 4.63 1.4545 3 11 0 4
65.49 3.13 1.4252 -4 10 1 4
66.91 1.89 1.3984 -1 11 2 4
66.92 36.27 1.3983 -6 6 1 4
67.38 1.45 1.3899 6 2 1 4
67.94 6.04 1.3797 -4 6 3 4
68.08 12.09 1.3772 5 1 2 4
69.16 6.64 1.3583 2 6 3 4
69.45 4.67 1.3534 1 11 2 4
69.86 2.70 1.3464 5 3 2 4
70.94 1.64 1.3285 -1 9 3 4
71.14 1.79 1.3252 -3 11 2 4
71.18 2.98 1.3246 7 1 0 4
71.19 2.24 1.3245 -5 5 3 4
71.26 1.15 1.3234 -6 6 2 4
71.28 1.20 1.3230 -2 0 4 2
71.49 2.52 1.3197 -1 1 4 4
72.42 3.47 1.3050 0 12 2 4
72.92 9.71 1.2973 0 0 4 2
73.10 1.05 1.2945 -6 8 1 4
73.16 1.03 1.2937 -7 1 2 4
73.20 2.00 1.2930 -5 9 2 4
73.25 19.16 1.2922 -2 12 2 4
73.86 1.08 1.2831 -6 2 3 4
74.41 1.02 1.2750 6 6 1 4
74.73 3.26 1.2703 -7 5 1 4
74.75 3.08 1.2700 -2 4 4 4
74.88 1.72 1.2681 -7 3 2 4
75.01 2.53 1.2662 4 12 0 4
75.68 1.20 1.2566 -2 10 3 4
75.82 1.65 1.2547 4 2 3 4
76.23 3.47 1.2490 -4 0 4 2
78.11 3.28 1.2235 2 12 2 4
78.16 1.69 1.2228 6 0 2 2
80.55 1.98 1.1925 -4 12 2 4
80.99 2.75 1.1872 2 0 4 2
81.71 8.90 1.1786 -5 11 2 4
81.75 1.01 1.1780 -8 2 1 4
83.12 1.80 1.1621 8 0 0 2
83.27 1.55 1.1603 1 15 1 4
87.41 1.14 1.1158 -6 0 4 2
87.46 1.09 1.1152 5 13 0 4
87.53 3.01 1.1145 3 1 4 4
88.12 1.94 1.1086 7 9 0 4
88.50 1.03 1.1048 3 13 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.