Pyroxene-ideal Thompson R M, Downs R T American Mineralogist 88 (2003) 653-666 Model pyroxenes I: Ideal pyroxene topologies Pyroxene #48b based on stacking sequence ABABCABCABAC Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience. _database_code_amcsd 0003068 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: 18.27130418 RIR: 0.606 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 20.10 1.19 4.4188 3 1 0 2 27.31 4.02 3.2660 6 0 0 1 29.78 8.54 3.0000 0 2 0 2 29.78 4.02 3.0000 0 1 1 2 30.14 3.49 2.9654 -1 1 1 2 31.18 2.23 2.8685 -2 1 1 2 32.85 3.93 2.7262 3 1 1 2 32.85 6.68 2.7262 -3 1 1 2 35.07 1.35 2.5584 -4 1 1 2 40.02 2.54 2.2528 -1 2 1 2 40.84 28.20 2.2094 6 2 0 2 40.84 1.76 2.2094 6 1 1 2 40.84 1.35 2.2094 -6 1 1 2 40.84 10.93 2.2094 -2 2 1 2 40.84 1.77 2.2094 2 2 1 2 42.18 14.00 2.1423 3 2 1 2 42.18 4.21 2.1423 -3 2 1 2 44.00 13.07 2.0580 4 2 1 2 44.00 3.52 2.0580 -4 2 1 2 44.25 93.07 2.0467 9 1 0 2 44.25 6.39 2.0467 7 1 1 2 46.25 19.40 1.9629 5 2 1 2 46.25 3.21 1.9629 -5 2 1 2 47.95 9.50 1.8974 8 1 1 2 48.89 1.61 1.8628 6 2 1 2 48.89 7.51 1.8628 -6 2 1 2 51.89 1.39 1.7621 9 1 1 2 51.89 1.26 1.7621 7 2 1 2 51.89 17.54 1.7621 -7 2 1 2 53.08 7.65 1.7253 1 3 1 2 53.08 3.82 1.7253 -1 0 2 1 53.74 2.17 1.7056 -2 3 1 2 53.74 19.68 1.7056 2 3 1 2 53.74 9.84 1.7056 -2 0 2 1 53.74 1.08 1.7056 2 0 2 1 54.84 24.46 1.6742 3 3 1 2 54.84 13.84 1.6742 -3 3 1 2 54.84 6.92 1.6742 3 0 2 1 54.84 12.23 1.6742 -3 0 2 1 55.20 6.24 1.6641 -8 2 1 2 56.06 5.02 1.6406 -10 1 1 2 56.06 4.07 1.6406 2 1 2 2 56.34 4.26 1.6330 12 0 0 1 56.34 4.24 1.6330 4 3 1 2 56.34 2.12 1.6330 -4 0 2 1 57.12 1.62 1.6126 3 1 2 2 57.12 5.32 1.6126 -3 1 2 2 58.24 4.09 1.5842 5 3 1 2 58.24 2.64 1.5842 -5 3 1 2 58.24 2.05 1.5842 -5 0 2 1 58.24 1.32 1.5842 5 0 2 1 58.58 1.38 1.5757 4 1 2 2 58.58 5.20 1.5757 -4 1 2 2 60.44 2.36 1.5317 -11 1 1 2 60.44 1.33 1.5317 5 1 2 2 60.44 8.02 1.5317 -5 1 2 2 60.50 7.22 1.5302 6 3 1 2 60.50 1.74 1.5302 -6 3 1 2 60.50 3.61 1.5302 -6 0 2 1 62.66 3.34 1.4827 6 1 2 2 63.12 4.39 1.4729 7 3 1 2 63.12 2.16 1.4729 -7 3 1 2 63.12 1.08 1.4729 7 0 2 1 63.12 2.20 1.4729 -7 0 2 1 65.03 1.08 1.4343 -12 1 1 2 65.22 8.15 1.4304 7 1 2 2 66.07 1.32 1.4142 -8 3 1 2 66.07 11.50 1.4142 8 3 1 2 66.07 5.75 1.4142 -8 0 2 1 66.78 2.07 1.4009 11 2 1 2 68.12 3.12 1.3765 8 1 2 2 68.88 5.13 1.3631 6 4 0 2 68.88 2.16 1.3631 -2 4 1 2 69.33 2.32 1.3555 9 3 1 2 69.33 1.16 1.3555 -9 0 2 1 69.83 2.75 1.3469 3 4 1 2 71.15 2.41 1.3252 12 2 1 2 71.15 1.09 1.3252 -12 2 1 2 71.15 2.74 1.3252 4 4 1 2 71.33 1.36 1.3222 -7 2 2 2 72.83 4.25 1.2987 5 4 1 2 72.89 1.04 1.2978 10 3 1 2 72.89 1.56 1.2978 -10 3 1 2 74.12 2.24 1.2792 -8 2 2 2 74.30 2.50 1.2765 15 1 0 2 74.86 1.87 1.2684 -6 4 1 2 76.75 1.39 1.2418 11 3 1 2 77.23 4.65 1.2352 -7 4 1 2 78.68 1.17 1.2161 -11 1 2 2 79.95 1.88 1.2000 -8 4 1 2 80.67 1.51 1.1911 10 2 2 2 80.91 4.96 1.1882 12 3 1 2 80.91 1.04 1.1882 -12 3 1 2 80.91 2.48 1.1882 -12 0 2 1 82.82 1.52 1.1655 -12 1 2 2 85.37 1.93 1.1371 -13 3 1 2 85.37 4.59 1.1371 13 3 1 2 85.37 2.29 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.