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 at 760C after Cameron et al. (1973) with O3-O3-O3 angle = 186.6 and model oxygen radius = 1.267 _database_code_amcsd 0003488 CELL PARAMETERS: 9.5890 8.7660 5.0610 90.000 111.700 90.000 SPACE GROUP: C2/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 395.265 Density (g/cm3): 3.127 MAX. ABS. INTENSITY / VOLUME**2: 10.63524190 RIR: 1.108 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 19.93 10.40 4.4547 2 0 0 2 20.26 56.76 4.3830 0 2 0 2 20.48 6.09 4.3362 -1 1 1 4 26.51 33.81 3.3617 1 1 1 4 27.83 38.56 3.2062 0 2 1 4 28.57 3.35 3.1243 2 2 0 4 29.95 100.00 2.9832 -2 2 1 4 30.80 9.92 2.9029 -3 1 1 4 31.81 55.98 2.8128 3 1 0 4 32.24 5.15 2.7765 1 3 0 4 35.61 1.30 2.5214 -1 3 1 4 36.00 9.20 2.4947 -2 0 2 2 37.20 1.55 2.4168 -1 1 2 4 38.28 36.64 2.3512 0 0 2 2 38.51 8.26 2.3378 2 2 1 4 40.50 7.70 2.2274 4 0 0 2 41.66 2.74 2.1681 -2 2 2 4 42.68 12.65 2.1187 -3 3 1 4 42.86 2.94 2.1102 3 1 1 4 43.22 2.06 2.0932 -4 2 1 4 43.45 2.63 2.0829 3 3 0 4 44.50 4.71 2.0359 -4 0 2 2 44.56 5.35 2.0336 1 1 2 4 45.67 6.97 1.9864 0 4 1 4 47.09 25.50 1.9298 -2 4 1 4 48.60 4.37 1.8734 -5 1 1 4 49.36 3.94 1.8464 -4 2 2 4 50.12 1.69 1.8200 2 0 2 2 50.44 1.44 1.8092 -3 3 2 4 52.40 1.23 1.7462 5 1 0 4 53.25 3.58 1.7202 1 5 0 4 53.35 2.85 1.7172 2 4 1 4 53.93 1.38 1.7002 1 3 2 4 54.60 2.17 1.6809 2 2 2 4 55.84 2.26 1.6464 -2 4 2 4 55.88 5.85 1.6452 4 2 1 4 57.48 16.33 1.6033 -5 3 1 4 57.49 1.88 1.6031 0 4 2 4 58.43 2.71 1.5795 1 5 1 4 58.65 15.27 1.5742 -2 2 3 4 59.14 3.93 1.5621 4 4 0 4 59.41 9.93 1.5557 3 1 2 4 60.15 2.36 1.5383 -6 0 2 2 61.41 1.25 1.5098 3 5 0 4 62.24 1.23 1.4916 -4 4 2 4 62.55 5.48 1.4849 6 0 0 2 63.70 8.47 1.4610 0 6 0 2 63.83 2.05 1.4583 -5 1 3 4 64.47 3.59 1.4454 -3 3 3 4 64.83 2.23 1.4381 -1 5 2 4 64.85 1.29 1.4377 -1 3 3 4 64.99 2.72 1.4351 1 1 3 4 67.08 2.22 1.3952 -3 5 2 4 67.96 2.71 1.3793 4 4 1 4 70.45 8.15 1.3366 -2 4 3 4 70.76 9.57 1.3314 -7 1 2 4 70.87 12.35 1.3297 5 3 1 4 71.50 1.45 1.3195 -5 3 3 4 72.60 2.13 1.3022 1 3 3 4 73.14 1.49 1.2940 -5 5 1 4 75.40 5.38 1.2607 -2 6 2 4 75.48 1.71 1.2596 7 1 0 4 75.65 1.96 1.2571 -2 0 4 2 76.18 1.46 1.2497 5 5 0 4 76.35 5.89 1.2473 -4 0 4 2 76.81 8.89 1.2409 0 6 2 4 77.28 2.36 1.2346 -7 3 1 4 78.85 2.81 1.2139 -1 1 4 4 79.32 1.55 1.2079 5 1 2 4 79.97 1.63 1.1997 -4 2 4 4 81.00 1.46 1.1870 -4 6 2 4 82.09 2.55 1.1740 3 5 2 4 85.16 2.28 1.1393 2 6 2 4 85.19 1.15 1.1390 -7 3 3 4 87.04 1.24 1.1195 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.