Pyroxene-ideal Thompson R M, Downs R T American Mineralogist 88 (2003) 653-666 Model pyroxenes I: Ideal pyroxene topologies Pyroxene #52 based on stacking sequence ABABCBACBCAC Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience. _database_code_amcsd 0003074 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: 18.56662482 RIR: 0.616 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 20.10 1.17 4.4188 3 1 0 2 27.31 3.96 3.2660 6 0 0 1 29.78 8.40 3.0000 0 2 0 2 30.14 13.74 2.9654 -1 1 1 2 31.18 6.57 2.8685 -2 1 1 2 32.85 6.42 2.7262 3 1 1 2 32.85 1.01 2.7262 -3 1 1 2 40.02 1.58 2.2528 1 2 1 2 40.84 27.75 2.2094 6 2 0 2 40.84 2.60 2.2094 6 1 1 2 40.84 2.60 2.2094 -6 1 1 2 40.84 10.76 2.2094 -2 2 1 2 40.84 6.96 2.2094 2 2 1 2 42.18 12.05 2.1423 3 2 1 2 42.18 12.05 2.1423 -3 2 1 2 44.00 12.86 2.0580 4 2 1 2 44.00 13.85 2.0580 -4 2 1 2 44.25 91.59 2.0467 9 1 0 2 44.25 6.29 2.0467 7 1 1 2 44.25 2.12 2.0467 -7 1 1 2 46.25 9.47 1.9629 -5 2 1 2 47.95 2.12 1.8974 -8 1 1 2 48.89 14.87 1.8628 6 2 1 2 48.89 3.26 1.8628 -6 2 1 2 51.89 3.79 1.7621 -9 1 1 2 51.89 1.82 1.7621 9 1 1 2 51.89 3.72 1.7621 7 2 1 2 53.08 3.52 1.7253 -1 3 1 2 53.08 7.53 1.7253 1 3 1 2 53.08 3.76 1.7253 -1 0 2 1 53.08 1.76 1.7253 1 0 2 1 53.74 6.40 1.7056 -2 3 1 2 53.74 3.20 1.7056 2 0 2 1 54.84 3.36 1.6742 3 3 1 2 54.84 24.26 1.6742 -3 3 1 2 54.84 12.13 1.6742 3 0 2 1 54.84 1.68 1.6742 -3 0 2 1 55.20 6.14 1.6641 -8 2 1 2 55.20 1.80 1.6641 8 2 1 2 56.06 1.66 1.6406 10 1 1 2 56.06 2.53 1.6406 -2 1 2 2 56.06 4.01 1.6406 2 1 2 2 56.34 4.19 1.6330 12 0 0 1 56.34 12.52 1.6330 4 3 1 2 56.34 6.26 1.6330 -4 0 2 1 57.12 4.62 1.6126 3 1 2 2 57.12 4.62 1.6126 -3 1 2 2 58.24 16.10 1.5842 5 3 1 2 58.24 2.59 1.5842 -5 3 1 2 58.24 8.05 1.5842 -5 0 2 1 58.24 1.30 1.5842 5 0 2 1 58.58 5.45 1.5757 4 1 2 2 58.58 5.12 1.5757 -4 1 2 2 60.44 1.41 1.5317 11 1 1 2 60.44 2.32 1.5317 -11 1 1 2 60.44 3.92 1.5317 5 1 2 2 60.50 2.44 1.5302 6 3 1 2 60.50 2.44 1.5302 -6 3 1 2 60.50 1.22 1.5302 6 0 2 1 60.50 1.22 1.5302 -6 0 2 1 62.06 1.44 1.4956 1 2 2 2 62.66 1.39 1.4827 6 1 2 2 62.66 6.55 1.4827 -6 1 2 2 63.12 4.32 1.4729 7 3 1 2 63.12 8.51 1.4729 -7 3 1 2 63.12 4.25 1.4729 7 0 2 1 63.12 2.16 1.4729 -7 0 2 1 65.03 1.19 1.4343 12 1 1 2 65.03 1.19 1.4343 -12 1 1 2 65.22 1.73 1.4304 -7 1 2 2 66.07 3.89 1.4142 -8 3 1 2 66.07 1.94 1.4142 8 0 2 1 68.12 3.07 1.3765 8 1 2 2 68.88 5.05 1.3631 6 4 0 2 68.88 2.12 1.3631 -2 4 1 2 68.88 1.26 1.3631 2 4 1 2 69.33 5.52 1.3555 -9 3 1 2 69.33 1.96 1.3555 9 3 1 2 69.33 2.76 1.3555 9 0 2 1 69.83 2.43 1.3469 -3 4 1 2 69.83 2.43 1.3469 3 4 1 2 71.15 2.82 1.3252 -12 2 1 2 71.15 2.70 1.3252 4 4 1 2 71.15 2.82 1.3252 -4 4 1 2 71.33 1.34 1.3222 -7 2 2 2 72.83 2.09 1.2987 -5 4 1 2 72.89 3.08 1.2978 10 3 1 2 72.89 1.54 1.2978 -10 0 2 1 74.30 2.46 1.2765 15 1 0 2 74.86 3.62 1.2684 6 4 1 2 75.77 1.48 1.2554 13 2 1 2 76.75 5.48 1.2418 11 3 1 2 76.75 2.74 1.2418 -11 0 2 1 77.23 1.01 1.2352 9 2 2 2 79.95 1.85 1.2000 -8 4 1 2 80.67 1.98 1.1911 14 2 1 2 80.91 2.46 1.1882 12 3 1 2 80.91 2.46 1.1882 -12 3 1 2 80.91 1.23 1.1882 -12 0 2 1 80.91 1.23 1.1882 12 0 2 1 82.82 1.74 1.1655 12 1 2 2 85.37 7.61 1.1371 -13 3 1 2 85.37 4.51 1.1371 13 3 1 2 85.37 2.26 1.1371 -13 0 2 1 85.37 3.81 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.