Pyroxene-ideal Thompson R M, Downs R T American Mineralogist 89 (2004) 614-628 Model pyroxenes II: Structural variation as a function of tetrahedral rotation model spodumene after Cameron et al. (1973) with O3-O3-O3 angle = 189.5 and model oxygen radius = 1.263 _database_code_amcsd 0003487 CELL PARAMETERS: 9.5700 8.7170 5.0330 90.000 112.100 90.000 SPACE GROUP: C2/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 389.014 Density (g/cm3): 3.177 MAX. ABS. INTENSITY / VOLUME**2: 11.16910088 RIR: 1.145 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 20.03 9.95 4.4334 2 0 0 2 20.38 54.57 4.3585 0 2 0 2 20.58 4.65 4.3166 -1 1 1 4 26.75 33.31 3.3322 1 1 1 4 28.02 34.96 3.1842 0 2 1 4 28.72 3.22 3.1081 2 2 0 4 30.05 100.00 2.9734 -2 2 1 4 30.85 9.19 2.8985 -3 1 1 4 31.97 54.21 2.7991 3 1 0 4 32.42 4.84 2.7612 1 3 0 4 36.16 8.47 2.4843 -2 0 2 2 37.45 1.58 2.4013 -1 1 2 4 38.62 36.84 2.3316 0 0 2 2 38.83 7.03 2.3193 2 2 1 4 40.70 7.43 2.2167 4 0 0 2 41.86 2.65 2.1583 -2 2 2 4 42.83 12.92 2.1114 -3 3 1 4 43.22 2.71 2.0933 3 1 1 4 43.33 1.62 2.0881 -4 2 1 4 43.68 2.46 2.0721 3 3 0 4 44.56 4.15 2.0333 -4 0 2 2 44.98 4.24 2.0153 1 1 2 4 45.97 6.01 1.9743 0 4 1 4 47.32 25.75 1.9208 -2 4 1 4 48.71 4.36 1.8694 -5 1 1 4 49.46 3.50 1.8427 -4 2 2 4 50.63 1.70 1.8030 2 0 2 2 50.63 1.14 1.8028 -3 3 2 4 52.67 1.20 1.7378 5 1 0 4 53.57 3.32 1.7106 1 5 0 4 53.75 2.31 1.7054 2 4 1 4 54.40 1.14 1.6867 1 3 2 4 55.12 1.95 1.6661 2 2 2 4 56.14 2.20 1.6383 -2 4 2 4 56.33 5.73 1.6332 4 2 1 4 57.67 16.73 1.5984 -5 3 1 4 57.92 1.37 1.5921 0 4 2 4 58.83 2.68 1.5696 1 5 1 4 59.02 14.67 1.5652 -2 2 3 4 59.48 3.69 1.5540 4 4 0 4 60.01 9.90 1.5416 3 1 2 4 60.22 2.02 1.5367 -6 0 2 2 61.78 1.28 1.5016 3 5 0 4 62.47 1.56 1.4867 -4 4 2 4 62.89 5.24 1.4778 6 0 0 2 63.97 1.84 1.4555 -5 1 3 4 64.10 8.32 1.4528 0 6 0 2 64.27 1.02 1.4493 -6 2 2 4 64.79 4.04 1.4389 -3 3 3 4 65.26 2.67 1.4296 -1 5 2 4 65.64 2.74 1.4223 1 1 3 4 67.42 1.70 1.3891 -3 5 2 4 68.49 2.61 1.3699 4 4 1 4 70.87 9.22 1.3297 -7 1 2 4 70.91 7.95 1.3291 -2 4 3 4 71.43 11.49 1.3206 5 3 1 4 71.71 1.31 1.3161 -5 3 3 4 73.31 2.22 1.2914 1 3 3 4 73.47 1.60 1.2889 -5 5 1 4 75.86 5.04 1.2541 -2 6 2 4 75.90 1.65 1.2535 7 1 0 4 76.23 1.51 1.2490 -2 0 4 2 76.65 1.39 1.2432 5 5 0 4 76.73 5.77 1.2421 -4 0 4 2 77.40 7.96 1.2331 0 6 2 4 77.57 2.42 1.2307 -7 3 1 4 79.56 2.90 1.2048 -1 1 4 4 80.13 1.30 1.1977 5 1 2 4 80.38 1.73 1.1946 -4 2 4 4 81.41 1.64 1.1821 -4 6 2 4 82.85 2.25 1.1651 3 5 2 4 85.37 1.13 1.1371 -7 3 3 4 85.92 2.35 1.1313 2 6 2 4 87.88 1.35 1.1110 1 5 3 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.