Pyroxene-ideal Thompson R M, Downs R T American Mineralogist 88 (2003) 653-666 Model pyroxenes I: Ideal pyroxene topologies Pyroxene #37b based on stacking sequence ABABACABACBC Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience. _database_code_amcsd 0003050 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: 17.58805588 RIR: 0.583 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 20.10 1.24 4.4188 3 1 0 2 27.31 4.18 3.2660 6 0 0 1 29.78 8.87 3.0000 0 2 0 2 29.78 4.18 3.0000 0 1 1 2 30.14 1.69 2.9654 -1 1 1 2 30.14 6.00 2.9654 1 1 1 2 31.18 12.04 2.8685 -2 1 1 2 31.18 1.35 2.8685 2 1 1 2 32.85 2.86 2.7262 3 1 1 2 35.07 1.24 2.5584 4 1 1 2 40.02 1.60 2.2528 -1 2 1 2 40.02 4.12 2.2528 1 2 1 2 40.84 29.30 2.2094 6 2 0 2 40.84 4.57 2.2094 6 1 1 2 40.84 4.15 2.2094 -6 1 1 2 40.84 5.12 2.2094 2 2 1 2 42.18 27.26 2.1423 3 2 1 2 42.18 17.09 2.1423 -3 2 1 2 44.00 13.75 2.0580 4 2 1 2 44.00 1.09 2.0580 -4 2 1 2 44.25 96.68 2.0467 9 1 0 2 44.25 1.92 2.0467 7 1 1 2 44.25 1.40 2.0467 -7 1 1 2 46.25 11.74 1.9629 5 2 1 2 46.25 4.22 1.9629 -5 2 1 2 47.95 5.31 1.8974 8 1 1 2 48.89 9.46 1.8628 6 2 1 2 48.89 3.33 1.8628 -6 2 1 2 51.89 2.68 1.7621 -9 1 1 2 51.89 1.64 1.7621 9 1 1 2 51.89 2.86 1.7621 7 2 1 2 51.89 9.77 1.7621 -7 2 1 2 53.08 3.12 1.7253 -1 3 1 2 53.08 1.56 1.7253 1 0 2 1 53.74 14.30 1.7056 -2 3 1 2 53.74 11.35 1.7056 2 3 1 2 53.74 5.67 1.7056 -2 0 2 1 53.74 7.15 1.7056 2 0 2 1 54.84 11.03 1.6742 -3 3 1 2 54.84 5.51 1.6742 3 0 2 1 55.20 1.24 1.6641 -8 2 1 2 55.20 1.59 1.6641 8 2 1 2 55.41 1.46 1.6581 -1 1 2 2 56.06 2.90 1.6406 -10 1 1 2 56.06 1.89 1.6406 -2 1 2 2 56.34 4.43 1.6330 12 0 0 1 56.34 23.74 1.6330 4 3 1 2 56.34 2.46 1.6330 -4 3 1 2 56.34 1.23 1.6330 4 0 2 1 56.34 11.87 1.6330 -4 0 2 1 57.12 6.56 1.6126 3 1 2 2 57.12 10.40 1.6126 -3 1 2 2 58.24 3.44 1.5842 5 3 1 2 58.24 5.12 1.5842 -5 3 1 2 58.24 1.72 1.5842 -5 0 2 1 58.24 2.56 1.5842 5 0 2 1 58.58 5.42 1.5757 -4 1 2 2 58.79 1.18 1.5706 -9 2 1 2 58.79 1.24 1.5706 9 2 1 2 60.44 1.49 1.5317 -11 1 1 2 60.44 1.76 1.5317 5 1 2 2 60.44 4.86 1.5317 -5 1 2 2 60.50 10.08 1.5302 6 3 1 2 60.50 4.38 1.5302 -6 3 1 2 60.50 2.19 1.5302 6 0 2 1 60.50 5.04 1.5302 -6 0 2 1 62.66 1.43 1.4827 6 1 2 2 62.66 4.15 1.4827 -6 1 2 2 62.66 1.36 1.4827 2 2 2 2 63.12 7.62 1.4729 7 3 1 2 63.12 3.81 1.4729 -7 0 2 1 65.03 1.76 1.4343 12 1 1 2 65.03 2.38 1.4343 -12 1 1 2 65.22 4.54 1.4304 7 1 2 2 65.22 1.39 1.4304 -7 1 2 2 66.07 6.66 1.4142 8 3 1 2 66.07 3.33 1.4142 -8 0 2 1 66.78 1.10 1.4009 -11 2 1 2 66.78 1.18 1.4009 11 2 1 2 68.88 5.33 1.3631 6 4 0 2 69.33 3.74 1.3555 -9 3 1 2 69.33 1.86 1.3555 9 3 1 2 69.33 1.87 1.3555 9 0 2 1 69.83 3.46 1.3469 -3 4 1 2 69.83 5.42 1.3469 3 4 1 2 71.15 1.42 1.3252 -12 2 1 2 71.15 2.81 1.3252 4 4 1 2 72.83 2.58 1.2987 5 4 1 2 72.89 3.86 1.2978 10 3 1 2 72.89 1.35 1.2978 -10 3 1 2 72.89 1.93 1.2978 -10 0 2 1 74.12 1.25 1.2792 -8 2 2 2 74.30 2.60 1.2765 15 1 0 2 74.86 2.29 1.2684 6 4 1 2 75.77 2.03 1.2554 13 2 1 2 76.75 1.71 1.2418 -11 3 1 2 76.75 1.20 1.2418 11 3 1 2 77.23 2.59 1.2352 -7 4 1 2 80.67 1.29 1.1911 -14 2 1 2 80.91 7.74 1.1882 12 3 1 2 80.91 3.67 1.1882 -12 3 1 2 80.91 3.87 1.1882 -12 0 2 1 80.91 1.83 1.1882 12 0 2 1 85.37 7.01 1.1371 13 3 1 2 85.37 3.50 1.1371 -13 0 2 1 85.85 1.11 1.1320 -15 2 1 2 87.27 1.36 1.1172 -13 1 2 2 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.