Pyroxene-ideal Thompson R M, Downs R T American Mineralogist 88 (2003) 653-666 Model pyroxenes I: Ideal pyroxene topologies Pyroxene #54 based on stacking sequence ABACABCBACBC Note: Atoms Mg, Si, and O are assigned to atomic positions just for convenience. _database_code_amcsd 0003076 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: 17.73631233 RIR: 0.588 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 20.10 1.23 4.4188 3 1 0 2 27.31 4.14 3.2660 6 0 0 1 29.78 8.80 3.0000 0 2 0 2 30.14 3.60 2.9654 -1 1 1 2 30.14 2.11 2.9654 1 1 1 2 31.18 6.88 2.8685 2 1 1 2 32.85 1.06 2.7262 3 1 1 2 32.85 6.72 2.7262 -3 1 1 2 35.07 1.72 2.5584 4 1 1 2 40.02 1.66 2.2528 -1 2 1 2 40.02 3.94 2.2528 1 2 1 2 40.84 29.05 2.2094 6 2 0 2 40.84 2.72 2.2094 6 1 1 2 40.84 2.72 2.2094 -6 1 1 2 40.84 6.54 2.2094 -2 2 1 2 40.84 1.82 2.2094 2 2 1 2 42.18 12.62 2.1423 3 2 1 2 42.18 12.62 2.1423 -3 2 1 2 44.00 8.54 2.0580 4 2 1 2 44.00 3.63 2.0580 -4 2 1 2 44.25 95.87 2.0467 9 1 0 2 44.25 3.57 2.0467 7 1 1 2 46.25 9.91 1.9629 5 2 1 2 46.25 7.64 1.9629 -5 2 1 2 47.95 2.22 1.8974 8 1 1 2 47.95 6.91 1.8974 -8 1 1 2 48.89 3.41 1.8628 6 2 1 2 48.89 15.57 1.8628 -6 2 1 2 51.89 1.91 1.7621 -9 1 1 2 51.89 3.97 1.7621 9 1 1 2 51.89 14.42 1.7621 7 2 1 2 51.89 3.89 1.7621 -7 2 1 2 53.08 4.40 1.7253 1 3 1 2 53.08 2.20 1.7253 -1 0 2 1 53.74 23.28 1.7056 -2 3 1 2 53.74 6.70 1.7056 2 3 1 2 53.74 3.35 1.7056 -2 0 2 1 53.74 11.64 1.7056 2 0 2 1 54.84 25.39 1.6742 3 3 1 2 54.84 3.52 1.6742 -3 3 1 2 54.84 1.76 1.6742 3 0 2 1 54.84 12.70 1.6742 -3 0 2 1 55.20 3.45 1.6641 -8 2 1 2 55.41 1.46 1.6581 -1 1 2 2 56.06 2.64 1.6406 10 1 1 2 56.06 1.74 1.6406 -10 1 1 2 56.06 2.43 1.6406 2 1 2 2 56.34 4.39 1.6330 12 0 0 1 56.34 2.20 1.6330 4 3 1 2 56.34 13.11 1.6330 -4 3 1 2 56.34 6.56 1.6330 4 0 2 1 56.34 1.10 1.6330 -4 0 2 1 57.12 4.84 1.6126 3 1 2 2 57.12 4.84 1.6126 -3 1 2 2 58.24 4.21 1.5842 5 3 1 2 58.24 3.46 1.5842 -5 3 1 2 58.24 2.11 1.5842 -5 0 2 1 58.24 1.73 1.5842 5 0 2 1 58.58 1.43 1.5757 4 1 2 2 58.58 3.39 1.5757 -4 1 2 2 60.44 1.40 1.5317 -11 1 1 2 60.44 3.15 1.5317 5 1 2 2 60.44 4.11 1.5317 -5 1 2 2 60.50 2.55 1.5302 6 3 1 2 60.50 2.55 1.5302 -6 3 1 2 60.50 1.28 1.5302 6 0 2 1 60.50 1.28 1.5302 -6 0 2 1 62.66 6.85 1.4827 6 1 2 2 62.66 1.46 1.4827 -6 1 2 2 63.12 3.37 1.4729 7 3 1 2 63.12 2.23 1.4729 -7 3 1 2 63.12 1.11 1.4729 7 0 2 1 63.12 1.69 1.4729 -7 0 2 1 65.03 1.25 1.4343 12 1 1 2 65.03 1.25 1.4343 -12 1 1 2 65.22 1.81 1.4304 7 1 2 2 65.22 6.76 1.4304 -7 1 2 2 66.07 5.96 1.4142 -8 3 1 2 66.07 4.07 1.4142 8 3 1 2 66.07 2.98 1.4142 8 0 2 1 66.07 2.03 1.4142 -8 0 2 1 66.78 2.24 1.4009 -11 2 1 2 68.12 1.72 1.3765 8 1 2 2 68.88 5.29 1.3631 6 4 0 2 68.88 1.28 1.3631 -2 4 1 2 69.33 2.06 1.3555 -9 3 1 2 69.33 5.78 1.3555 9 3 1 2 69.33 2.89 1.3555 -9 0 2 1 69.33 1.03 1.3555 9 0 2 1 69.83 2.55 1.3469 -3 4 1 2 69.83 2.55 1.3469 3 4 1 2 71.15 2.95 1.3252 12 2 1 2 71.15 1.78 1.3252 4 4 1 2 72.83 2.19 1.2987 5 4 1 2 72.83 1.67 1.2987 -5 4 1 2 72.89 3.22 1.2978 -10 3 1 2 72.89 1.61 1.2978 10 0 2 1 74.12 1.65 1.2792 8 2 2 2 74.30 2.58 1.2765 15 1 0 2 74.86 3.79 1.2684 -6 4 1 2 75.77 1.55 1.2554 -13 2 1 2 76.75 1.20 1.2418 -11 3 1 2 76.75 1.43 1.2418 11 3 1 2 77.23 3.90 1.2352 7 4 1 2 77.23 1.03 1.2352 -7 4 1 2 77.23 1.06 1.2352 -9 2 2 2 78.68 1.30 1.2161 11 1 2 2 79.95 1.04 1.2000 -8 4 1 2 80.91 2.57 1.1882 12 3 1 2 80.91 2.57 1.1882 -12 3 1 2 80.91 1.29 1.1882 -12 0 2 1 80.91 1.29 1.1882 12 0 2 1 82.82 1.82 1.1655 -12 1 2 2 85.37 1.99 1.1371 -13 3 1 2 85.37 3.36 1.1371 13 3 1 2 85.37 1.68 1.1371 -13 0 2 1 87.27 1.02 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.