Pyroxene-ideal Thompson R M, Downs R T American Mineralogist 88 (2003) 653-666 Model pyroxenes I: Ideal pyroxene topologies Pyroxene #47b based on stacking sequence ABABCABACBAC Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience. _database_code_amcsd 0003066 CELL PARAMETERS: 19.5959 6.0000 3.4641 90.000 90.000 90.000 SPACE GROUP: Pc X-RAY WAVELENGTH: 1.541838 Cell Volume: 407.293 Density (g/cm3): 9.821 MAX. ABS. INTENSITY / VOLUME**2: 18.80629806 RIR: 0.623 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 20.10 1.16 4.4188 3 1 0 2 27.31 3.91 3.2660 6 0 0 1 29.78 8.30 3.0000 0 2 0 2 29.78 3.91 3.0000 0 1 1 2 30.14 1.99 2.9654 -1 1 1 2 31.18 4.15 2.8685 -2 1 1 2 32.85 6.49 2.7262 3 1 1 2 32.85 3.82 2.7262 -3 1 1 2 40.02 1.24 2.2528 -1 2 1 2 40.02 1.03 2.2528 1 2 1 2 40.84 27.40 2.2094 6 2 0 2 40.84 10.62 2.2094 -2 2 1 2 40.84 6.17 2.2094 2 2 1 2 42.18 9.63 2.1423 3 2 1 2 44.00 12.70 2.0580 4 2 1 2 44.00 8.06 2.0580 -4 2 1 2 44.25 90.42 2.0467 9 1 0 2 44.25 6.21 2.0467 7 1 1 2 44.25 3.37 2.0467 -7 1 1 2 46.25 2.40 1.9629 5 2 1 2 46.25 20.27 1.9629 -5 2 1 2 47.95 2.17 1.8974 8 1 1 2 47.95 6.28 1.8974 -8 1 1 2 48.89 7.30 1.8628 6 2 1 2 48.89 1.57 1.8628 -6 2 1 2 51.89 1.36 1.7621 -9 1 1 2 51.89 10.42 1.7621 7 2 1 2 51.89 4.53 1.7621 -7 2 1 2 53.08 4.15 1.7253 -1 3 1 2 53.08 7.43 1.7253 1 3 1 2 53.08 3.71 1.7253 -1 0 2 1 53.08 2.07 1.7253 1 0 2 1 53.74 8.70 1.7056 -2 3 1 2 53.74 7.32 1.7056 2 3 1 2 53.74 3.66 1.7056 -2 0 2 1 53.74 4.35 1.7056 2 0 2 1 54.84 13.45 1.6742 3 3 1 2 54.84 23.77 1.6742 -3 3 1 2 54.84 11.88 1.6742 3 0 2 1 54.84 6.73 1.6742 -3 0 2 1 55.20 6.06 1.6641 -8 2 1 2 55.20 3.25 1.6641 8 2 1 2 56.06 4.31 1.6406 10 1 1 2 56.06 2.29 1.6406 -2 1 2 2 56.06 3.96 1.6406 2 1 2 2 56.34 4.14 1.6330 12 0 0 1 56.34 7.34 1.6330 4 3 1 2 56.34 3.67 1.6330 -4 0 2 1 57.12 3.64 1.6126 -3 1 2 2 58.24 3.27 1.5842 5 3 1 2 58.24 2.56 1.5842 -5 3 1 2 58.24 1.63 1.5842 -5 0 2 1 58.24 1.28 1.5842 5 0 2 1 58.58 3.20 1.5757 4 1 2 2 58.58 5.05 1.5757 -4 1 2 2 60.44 1.32 1.5317 11 1 1 2 60.44 2.29 1.5317 -11 1 1 2 60.44 8.39 1.5317 5 1 2 2 60.50 6.21 1.5302 6 3 1 2 60.50 3.11 1.5302 -6 0 2 1 62.66 3.24 1.4827 -6 1 2 2 63.12 4.27 1.4729 7 3 1 2 63.12 3.18 1.4729 -7 3 1 2 63.12 1.59 1.4729 7 0 2 1 63.12 2.13 1.4729 -7 0 2 1 65.22 2.12 1.4304 7 1 2 2 65.22 4.80 1.4304 -7 1 2 2 66.07 9.98 1.4142 -8 3 1 2 66.07 1.87 1.4142 8 3 1 2 66.07 4.99 1.4142 8 0 2 1 68.12 3.03 1.3765 8 1 2 2 68.12 1.62 1.3765 -8 1 2 2 68.88 4.99 1.3631 6 4 0 2 68.88 2.10 1.3631 -2 4 1 2 68.88 1.20 1.3631 2 4 1 2 69.33 2.26 1.3555 -9 3 1 2 69.33 1.13 1.3555 9 0 2 1 69.83 1.87 1.3469 3 4 1 2 71.15 1.06 1.3252 12 2 1 2 71.15 2.34 1.3252 -12 2 1 2 71.15 2.66 1.3252 4 4 1 2 71.15 1.68 1.3252 -4 4 1 2 71.33 1.33 1.3222 -7 2 2 2 72.83 4.46 1.2987 -5 4 1 2 72.89 3.51 1.2978 10 3 1 2 72.89 1.75 1.2978 -10 0 2 1 74.12 1.47 1.2792 8 2 2 2 74.30 2.43 1.2765 15 1 0 2 74.86 1.82 1.2684 6 4 1 2 75.77 1.52 1.2554 13 2 1 2 76.75 1.13 1.2418 11 3 1 2 77.23 2.72 1.2352 7 4 1 2 77.23 1.23 1.2352 -7 4 1 2 79.95 1.83 1.2000 -8 4 1 2 80.67 1.29 1.1911 -10 2 2 2 80.91 4.01 1.1882 12 3 1 2 80.91 2.00 1.1882 -12 0 2 1 82.82 1.48 1.1655 12 1 2 2 85.37 3.17 1.1371 -13 3 1 2 85.37 4.46 1.1371 13 3 1 2 85.37 2.23 1.1371 -13 0 2 1 85.37 1.58 1.1371 13 0 2 1 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.