Pyroxene-ideal
Thompson R M, Downs R T
American Mineralogist 88 (2003) 653-666
Model pyroxenes I: Ideal pyroxene topologies
Pyroxene #20b based on stacking sequence ABABCACBACBC
Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience.
_database_code_amcsd 0003025
CELL PARAMETERS: 19.5959 6.0000 3.4641 90.000 90.000 90.000
SPACE GROUP: P2_1/c
X-RAY WAVELENGTH: 1.541838
Cell Volume: 407.293
Density (g/cm3): 9.821
MAX. ABS. INTENSITY / VOLUME**2: 18.93814252
RIR: 0.628
RIR based on corundum from Acta Crystallographica A38 (1982) 733-739
2-THETA INTENSITY D-SPACING H K L Multiplicity
20.10 1.15 4.4188 3 1 0 4
27.31 3.88 3.2660 6 0 0 2
29.78 8.24 3.0000 0 2 0 2
30.14 1.63 2.9654 1 1 1 4
31.18 14.32 2.8685 -2 1 1 4
35.07 2.70 2.5584 4 1 1 4
40.02 8.05 2.2528 1 2 1 4
40.84 27.21 2.2094 6 2 0 4
40.84 5.47 2.2094 -2 2 1 4
40.84 1.37 2.2094 2 2 1 4
42.18 3.94 2.1423 3 2 1 4
42.18 3.94 2.1423 -3 2 1 4
44.00 27.96 2.0580 4 2 1 4
44.00 6.99 2.0580 -4 2 1 4
44.25 89.79 2.0467 9 1 0 4
44.25 8.17 2.0467 7 1 1 4
44.25 2.04 2.0467 -7 1 1 4
46.25 8.52 1.9629 5 2 1 4
47.95 2.77 1.8974 8 1 1 4
47.95 3.09 1.8974 -8 1 1 4
48.89 7.44 1.8628 6 2 1 4
48.89 7.44 1.8628 -6 2 1 4
51.89 2.63 1.7621 -9 1 1 4
51.89 2.63 1.7621 9 1 1 4
51.89 9.46 1.7621 7 2 1 4
51.89 4.57 1.7621 -7 2 1 4
53.08 1.22 1.7253 -1 3 1 4
53.08 4.88 1.7253 1 3 1 4
53.08 2.44 1.7253 -1 0 2 2
53.74 32.72 1.7056 -2 3 1 4
53.74 3.27 1.7056 2 3 1 4
53.74 1.64 1.7056 -2 0 2 2
53.74 16.36 1.7056 2 0 2 2
54.84 3.48 1.6742 3 3 1 4
54.84 3.48 1.6742 -3 3 1 4
54.84 1.74 1.6742 3 0 2 2
54.84 1.74 1.6742 -3 0 2 2
55.20 6.99 1.6641 -8 2 1 4
55.20 1.75 1.6641 8 2 1 4
55.41 2.89 1.6581 -1 1 2 4
56.06 1.87 1.6406 -10 1 1 4
56.06 2.08 1.6406 2 1 2 4
56.34 4.11 1.6330 12 0 0 2
56.34 29.10 1.6330 4 3 1 4
56.34 1.60 1.6330 -4 3 1 4
56.34 14.55 1.6330 -4 0 2 2
57.12 1.51 1.6126 3 1 2 4
57.12 1.51 1.6126 -3 1 2 4
58.58 2.77 1.5757 4 1 2 4
58.58 11.07 1.5757 -4 1 2 4
60.44 4.00 1.5317 -11 1 1 4
60.44 3.52 1.5317 -5 1 2 4
62.66 3.24 1.4827 6 1 2 4
62.66 3.24 1.4827 -6 1 2 4
62.66 1.63 1.4827 2 2 2 4
63.12 12.13 1.4729 7 3 1 4
63.12 3.03 1.4729 -7 3 1 4
63.12 1.52 1.4729 7 0 2 2
63.12 6.07 1.4729 -7 0 2 2
65.22 2.10 1.4304 7 1 2 4
65.22 4.54 1.4304 -7 1 2 4
66.07 4.32 1.4142 8 3 1 4
66.07 2.16 1.4142 -8 0 2 2
66.78 2.70 1.4009 -11 2 1 4
68.12 3.43 1.3765 8 1 2 4
68.31 1.48 1.3731 1 4 1 4
68.88 4.95 1.3631 6 4 0 4
68.88 1.15 1.3631 -2 4 1 4
69.33 3.37 1.3555 -9 3 1 4
69.33 3.37 1.3555 9 3 1 4
69.33 1.68 1.3555 -9 0 2 2
69.33 1.68 1.3555 9 0 2 2
71.15 5.79 1.3252 4 4 1 4
71.15 1.45 1.3252 -4 4 1 4
71.33 1.70 1.3222 -7 2 2 4
72.83 1.87 1.2987 5 4 1 4
72.89 3.17 1.2978 10 3 1 4
72.89 1.24 1.2978 -10 3 1 4
72.89 1.59 1.2978 -10 0 2 2
74.30 2.41 1.2765 15 1 0 4
74.86 1.76 1.2684 6 4 1 4
74.86 1.76 1.2684 -6 4 1 4
75.77 1.83 1.2554 13 2 1 4
77.23 2.70 1.2352 7 4 1 4
77.23 1.19 1.2352 -7 4 1 4
78.68 1.64 1.2161 11 1 2 4
79.95 2.03 1.2000 -8 4 1 4
80.67 1.06 1.1911 -14 2 1 4
84.42 1.38 1.1474 11 2 2 4
85.37 2.96 1.1371 -13 3 1 4
85.37 11.85 1.1371 13 3 1 4
85.37 5.92 1.1371 -13 0 2 2
85.37 1.48 1.1371 13 0 2 2
87.27 1.25 1.1172 -13 1 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.