Arfvedsonite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R050082 Hawthorne F C The Canadian Mineralogist 14 (1976) 346-356 The crystal chemistry of the amphiboles: V. The structure and chemistry of arfvedsonite CELL PARAMETERS: 10.00700 18.07700 5.332000 90.00000 104.1010 90.00000 SPACE GROUP: C2/m X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 9.85 5.28 9.0513 0 2 0 10.50 100.00 8.4935 1 1 0 17.17 9.76 5.1882 0 0 1 17.42 16.88 5.1115 1 3 0 18.52 15.08 4.8089 2 0 0 19.69 10.67 4.5256 0 4 0 19.80 1.01 4.5012 0 2 1 20.99 4.13 4.2468 2 2 0 22.12 5.98 4.0304 -2 0 1 21.92 18.34 4.0680 1 1 1 22.92 1.92 3.8922 -1 3 1 26.02 58.55 3.4332 1 3 1 26.20 18.93 3.4105 0 4 1 27.12 33.84 3.2957 2 4 0 28.34 52.64 3.1568 3 1 0 29.59 10.42 3.0255 -3 1 1 29.75 11.62 3.0099 -2 4 1 29.67 1.25 3.0171 0 6 0 29.89 19.97 2.9957 2 2 1 31.66 23.91 2.8312 3 3 0 32.80 27.53 2.7353 -3 3 1 32.80 86.49 2.7352 1 5 1 34.04 1.42 2.6386 -1 1 2 34.44 55.95 2.6082 0 6 1 34.57 9.54 2.5990 2 4 1 35.17 2.29 2.5557 2 6 0 35.30 71.36 2.5468 -2 0 2 36.02 4.37 2.4974 1 7 0 36.07 1.13 2.4937 0 2 2 36.90 1.90 2.4394 -1 3 2 37.46 10.29 2.4045 4 0 0 37.28 4.02 2.4153 -2 6 1 37.53 6.06 2.4002 3 5 0 38.51 26.64 2.3409 -3 5 1 38.75 8.06 2.3271 -4 2 1 38.80 1.80 2.3239 4 2 0 38.38 1.11 2.3486 1 1 2 39.12 8.98 2.3059 -1 7 1 39.34 1.86 2.2932 3 3 1 39.59 17.72 2.2795 -3 1 2 40.70 5.79 2.2195 -2 4 2 41.11 2.11 2.1985 1 7 1 41.33 44.09 2.1870 2 6 1 42.13 9.89 2.1474 -3 3 2 42.13 2.82 2.1473 -1 5 2 42.58 5.52 2.1258 -4 4 1 43.40 22.69 2.0874 2 0 2 44.33 13.51 2.0456 3 5 1 45.03 14.88 2.0152 -4 0 2 46.34 1.27 1.9612 4 2 1 46.15 1.98 1.9688 1 9 0 46.88 3.52 1.9401 -3 5 2 47.58 2.64 1.9128 5 1 0 48.41 11.97 1.8821 -4 6 1 48.04 1.26 1.8955 2 4 2 48.90 1.03 1.8641 -5 3 1 48.72 1.67 1.8708 -1 9 1 49.56 2.56 1.8409 -4 4 2 49.70 3.43 1.8362 4 4 1 50.40 5.77 1.8120 1 9 1 50.45 9.98 1.8103 0 10 0 52.42 4.06 1.7467 -5 1 2 51.75 1.27 1.7679 -1 1 3 52.42 1.99 1.7467 1 7 2 53.18 2.20 1.7236 -5 5 1 53.80 1.13 1.7052 0 8 2 53.84 5.32 1.7041 -1 3 3 54.18 5.66 1.6942 2 10 0 54.02 2.99 1.6987 0 2 3 54.27 2.42 1.6916 -2 8 2 54.59 3.64 1.6822 -3 9 1 54.95 27.64 1.6722 4 6 1 55.83 3.26 1.6479 4 8 0 55.96 2.30 1.6442 -2 4 3 56.79 9.97 1.6221 1 11 0 57.53 5.89 1.6030 6 0 0 57.04 1.67 1.6155 0 4 3 57.85 18.55 1.5947 -1 5 3 58.15 5.49 1.5873 4 0 2 58.75 2.21 1.5726 2 10 1 59.88 1.10 1.5455 -6 4 1 60.36 12.78 1.5343 -6 0 2 60.23 1.17 1.5372 -3 5 3 60.41 2.25 1.5332 1 9 2 60.83 6.52 1.5236 5 5 1 60.84 20.65 1.5233 -2 6 3 61.66 1.78 1.5049 -4 8 2 61.79 1.42 1.5022 -4 4 3 61.50 8.89 1.5085 0 12 0 61.98 2.89 1.4979 4 4 2 61.87 4.50 1.5004 0 6 3 62.03 1.23 1.4969 2 2 3 62.29 1.48 1.4912 1 5 3 62.60 2.57 1.4845 0 10 2 63.03 6.09 1.4755 -2 10 2 64.11 1.52 1.4531 -6 4 2 63.58 3.90 1.4641 3 11 0 63.57 1.48 1.4642 -1 7 3 64.57 24.23 1.4439 -6 6 1 64.42 1.49 1.4470 -4 10 1 64.45 4.79 1.4462 4 10 0 65.41 2.15 1.4274 -5 3 3 66.40 2.14 1.4083 -4 6 3 67.28 9.22 1.3920 5 1 2 68.51 2.68 1.3700 7 1 0 69.01 4.19 1.3613 -5 5 3 68.65 3.67 1.3676 2 10 2 69.07 3.01 1.3602 5 3 2 69.32 6.54 1.3559 2 6 3 70.28 1.56 1.3397 7 3 0 69.87 2.93 1.3467 -4 10 2 69.58 5.31 1.3515 1 11 2 70.39 3.95 1.3379 -3 11 2 70.78 2.05 1.3315 -1 9 3 71.73 8.42 1.3162 -7 5 1 71.25 4.94 1.3238 -1 1 4 71.43 1.27 1.3210 1 13 1 72.50 1.36 1.3041 0 12 2 72.90 12.62 1.2979 -2 12 2 72.83 1.56 1.2989 3 5 3 73.00 2.45 1.2964 -1 3 4 72.95 4.30 1.2971 0 0 4 74.23 2.40 1.2779 4 12 0 74.53 5.83 1.2734 -4 0 4 76.92 2.41 1.2396 6 0 2 78.19 1.08 1.2227 2 12 2 79.78 2.97 1.2022 8 0 0 79.92 5.71 1.2004 -5 11 2 79.95 1.13 1.2001 6 10 0 80.48 1.16 1.1935 4 10 2 81.23 3.92 1.1843 2 0 4 82.40 3.22 1.1705 -6 10 2 83.00 1.41 1.1636 -8 4 2 85.61 1.05 1.1345 7 9 0 87.62 1.11 1.1136 -6 4 4 87.71 2.11 1.1127 3 1 4 88.43 2.78 1.1054 0 16 1 88.69 1.39 1.1029 5 5 3 89.66 2.14 1.0935 4 12 2 89.66 2.14 1.0935 4 12 2 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.