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 acmite after Cameron et al. (1973) with O3-O3-O3 angle = 174.0 and model oxygen radius = 1.302 _database_code_amcsd 0003497 CELL PARAMETERS: 9.7370 9.0090 5.2010 90.000 109.900 90.000 SPACE GROUP: C2/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 428.992 Density (g/cm3): 3.576 MAX. ABS. INTENSITY / VOLUME**2: 14.48128039 RIR: 1.319 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 13.79 46.30 6.4215 1 1 0 4 19.39 8.60 4.5778 2 0 0 2 19.71 34.00 4.5045 0 2 0 2 20.02 6.12 4.4342 -1 1 1 4 25.39 16.98 3.5079 1 1 1 4 26.91 7.36 3.3132 0 2 1 4 27.79 3.24 3.2108 2 2 0 4 29.41 100.00 3.0372 -2 2 1 4 30.43 8.82 2.9375 -3 1 1 4 30.94 72.75 2.8905 3 1 0 4 31.35 3.53 2.8534 1 3 0 4 34.68 36.93 2.5869 -1 3 1 4 36.05 8.71 2.4915 -1 1 2 4 36.75 47.75 2.4452 0 0 2 2 36.98 23.74 2.4309 2 2 1 4 38.16 9.90 2.3581 1 3 1 4 39.88 2.63 2.2604 -3 1 2 4 41.08 2.77 2.1973 3 1 1 4 41.83 30.30 2.1594 -3 3 1 4 42.22 1.84 2.1405 3 3 0 4 42.51 9.69 2.1264 -4 2 1 4 42.59 15.99 2.1228 1 1 2 4 44.04 14.64 2.0563 -4 0 2 2 44.28 1.34 2.0457 0 4 1 4 45.94 24.07 1.9754 -2 4 1 4 47.76 7.14 1.9042 2 0 2 2 47.82 2.24 1.9022 -5 1 1 4 48.68 3.13 1.8706 -4 2 2 4 49.44 1.44 1.8434 -3 3 2 4 50.46 3.66 1.8087 3 3 1 4 51.46 9.12 1.7759 2 4 1 4 51.71 6.96 1.7679 1 5 0 4 51.75 1.19 1.7665 1 3 2 4 52.15 1.74 1.7539 2 2 2 4 53.66 8.14 1.7080 4 2 1 4 54.38 1.03 1.6872 -2 4 2 4 55.47 2.64 1.6566 0 4 2 4 55.85 3.70 1.6462 -4 4 1 4 56.33 20.50 1.6332 -5 3 1 4 56.50 1.17 1.6287 1 5 1 4 56.60 10.41 1.6262 3 1 2 4 56.92 17.02 1.6178 -2 2 3 4 57.40 2.60 1.6054 4 4 0 4 59.50 7.11 1.5537 -6 0 2 2 59.59 2.89 1.5516 3 5 0 4 60.69 8.57 1.5259 6 0 0 2 61.79 11.31 1.5015 0 6 0 2 61.99 1.34 1.4971 1 1 3 4 62.55 8.23 1.4849 -1 3 3 4 62.80 1.50 1.4796 -1 5 2 4 62.88 5.18 1.4781 -3 3 3 4 62.96 1.77 1.4763 -5 1 3 4 65.37 3.85 1.4276 4 4 1 4 65.42 5.27 1.4265 -3 5 2 4 68.06 18.43 1.3776 5 3 1 4 68.28 8.93 1.3737 -2 4 3 4 69.36 4.16 1.3549 1 3 3 4 69.83 9.44 1.3469 -7 1 2 4 70.28 4.87 1.3394 -5 3 3 4 73.11 2.62 1.2944 7 1 0 4 73.78 2.89 1.2843 -3 1 4 4 74.10 13.53 1.2795 0 6 2 4 74.44 1.52 1.2745 1 7 0 4 74.51 5.28 1.2735 -4 0 4 2 75.62 1.72 1.2575 -1 1 4 4 75.77 1.44 1.2555 4 6 0 4 78.18 1.94 1.2226 0 0 4 2 78.52 4.26 1.2182 3 5 2 4 78.95 2.13 1.2126 -4 6 2 4 81.10 1.30 1.1859 3 7 0 4 81.66 3.00 1.1791 2 6 2 4 82.60 2.27 1.1680 -8 2 1 4 82.64 2.29 1.1676 -6 0 4 2 85.76 1.61 1.1329 6 0 2 2 86.31 2.12 1.1271 -3 7 2 4 87.11 1.52 1.1188 4 2 3 4 88.83 2.40 1.1015 -8 2 3 4 89.80 2.11 1.0922 2 0 4 2 89.92 1.98 1.0910 -7 1 4 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.