Arfvedsonite Diffraction data computed using the structute from the paper listed below, along with the cell parameters refined from single crystal data of R060038 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: 9.7670 17.9550 5.2850 90.000 104.150 90.000 SPACE GROUP: C2/m ATOM X Y Z OCCUPANCY ISO(B) Si 0.27380 0.08618 0.29170 0.960 0.448 Al 0.27380 0.08618 0.29170 0.040 0.448 Si 0.28640 0.17104 0.80180 1.000 0.471 Fe 0.00000 0.09205 0.50000 1.000 0.637 Fe 0.00000 0.18443 0.00000 0.880 0.593 Al 0.00000 0.18443 0.00000 0.073 0.593 Ti 0.00000 0.18443 0.00000 0.047 0.593 Fe 0.00000 0.00000 0.00000 0.760 0.632 Mn 0.00000 0.00000 0.00000 0.130 0.632 Mg 0.00000 0.00000 0.00000 0.110 0.632 Na 0.00000 0.27790 0.50000 0.921 1.189 Ca 0.00000 0.27790 0.50000 0.079 1.189 Na 0.01720 0.50000 0.04020 0.293 1.280 K 0.01720 0.50000 0.04020 0.707 1.280 O 0.10960 0.09140 0.20820 1.000 0.699 O 0.12010 0.17310 0.73320 1.000 0.869 OH 0.10740 0.00000 0.70670 1.000 0.719 O 0.36430 0.24730 0.79840 1.000 0.882 O 0.34400 0.12730 0.08270 1.000 0.721 O 0.33630 0.11720 0.58410 1.000 0.794 O 0.32620 0.00000 0.29880 1.000 0.923 X-RAY WAVELENGTH: 1.541838 BOUNDS ON TWO THETA: 5.0 90.0 LIMITS IMPOSED ON THE INDICES ARE: +/- 8 +/- 16 +/- 4 MAX. ABS. INTENSITY / VOLUME**2: 10.70754220 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 9.85 5.43 8.9775 0 2 0 10.56 100.00 8.3768 1 1 0 17.30 9.97 5.1246 0 0 1 17.53 17.14 5.0594 1 3 0 18.74 14.95 4.7353 2 0 0 19.78 10.95 4.4887 0 4 0 19.95 1.03 4.4506 0 2 1 21.21 4.09 4.1884 2 2 0 22.21 18.49 4.0031 1 1 1 22.23 5.97 3.9992 -2 0 1 23.03 1.95 3.8613 -1 3 1 26.32 59.24 3.3861 1 3 1 26.40 19.36 3.3766 0 4 1 27.38 33.84 3.2577 2 4 0 28.71 51.37 3.1092 3 1 0 29.81 10.24 2.9975 -3 1 1 29.86 1.28 2.9925 0 6 0 29.92 11.72 2.9860 -2 4 1 30.34 19.84 2.9459 2 2 1 32.05 23.47 2.7923 3 3 0 33.05 27.24 2.7105 -3 3 1 33.14 87.85 2.7032 1 5 1 34.31 1.45 2.6134 -1 1 2 34.71 57.20 2.5842 0 6 1 35.04 9.54 2.5611 2 4 1 35.49 2.31 2.5297 2 6 0 35.53 72.12 2.5269 -2 0 2 36.28 4.44 2.4758 1 7 0 36.47 1.14 2.4639 0 2 2 37.21 1.93 2.4166 -1 3 2 37.54 4.11 2.3960 -2 6 1 37.95 5.97 2.3710 3 5 0 38.00 10.11 2.3677 4 0 0 38.81 26.70 2.3203 -3 5 1 38.92 1.15 2.3143 1 1 2 39.12 7.81 2.3028 -4 2 1 39.36 1.73 2.2894 4 2 0 39.39 9.15 2.2873 -1 7 1 39.84 17.68 2.2627 -3 1 2 39.97 1.82 2.2556 3 3 1 40.99 5.81 2.2020 -2 4 2 41.51 2.16 2.1755 1 7 1 41.84 44.13 2.1592 2 6 1 42.41 9.85 2.1314 -3 3 2 42.48 2.85 2.1279 -1 5 2 42.98 5.41 2.1045 -4 4 1 44.11 22.69 2.0532 2 0 2 44.98 13.33 2.0154 3 5 1 45.35 14.56 1.9996 -4 0 2 46.52 2.01 1.9522 1 9 0 47.15 1.25 1.9275 4 2 1 47.21 3.50 1.9254 -3 5 2 48.32 2.48 1.8837 5 1 0 48.77 1.26 1.8672 2 4 2 48.86 11.76 1.8639 -4 6 1 49.09 1.70 1.8556 -1 9 1 49.93 2.54 1.8265 -4 4 2 50.52 3.34 1.8066 4 4 1 50.85 10.17 1.7955 0 10 0 50.89 5.86 1.7944 1 9 1 52.29 1.28 1.7495 -1 1 3 52.86 3.98 1.7319 -5 1 2 53.05 2.00 1.7262 1 7 2 53.76 2.12 1.7050 -5 5 1 54.34 1.15 1.6883 0 8 2 54.40 5.39 1.6866 -1 3 3 54.67 5.72 1.6789 2 10 0 54.70 3.01 1.6781 0 2 3 54.70 2.46 1.6780 -2 8 2 55.06 3.65 1.6679 -3 9 1 55.80 27.16 1.6475 4 6 1 56.46 2.32 1.6298 -2 4 3 56.50 3.22 1.6289 4 8 0 57.27 10.14 1.6086 1 11 0 57.75 1.68 1.5965 0 4 3 58.46 18.82 1.5788 -1 5 3 58.47 5.56 1.5784 6 0 0 59.26 5.34 1.5593 4 0 2 59.40 2.22 1.5560 2 10 1 60.63 1.06 1.5274 -6 4 1 60.73 1.17 1.5251 -3 5 3 60.95 12.34 1.5201 -6 0 2 61.11 2.27 1.5164 1 9 2 61.40 20.87 1.5101 -2 6 3 61.88 6.35 1.4995 5 5 1 62.03 9.06 1.4963 0 12 0 62.18 1.77 1.4930 -4 8 2 62.27 1.41 1.4910 -4 4 3 62.62 4.53 1.4835 0 6 3 63.06 1.24 1.4742 2 2 3 63.12 2.81 1.4730 4 4 2 63.17 1.50 1.4718 1 5 3 63.24 2.61 1.4704 0 10 2 63.57 6.17 1.4636 -2 10 2 64.24 1.51 1.4500 -1 7 3 64.24 3.95 1.4499 3 11 0 64.75 1.47 1.4397 -6 4 2 65.05 1.48 1.4339 -4 10 1 65.21 4.76 1.4307 4 10 0 65.37 23.36 1.4276 -6 6 1 65.93 2.13 1.4167 -5 3 3 66.95 2.14 1.3977 -4 6 3 68.64 8.95 1.3673 5 1 2 69.55 3.70 1.3516 2 10 2 69.59 4.19 1.3510 -5 5 3 69.70 2.58 1.3491 7 1 0 70.39 5.41 1.3376 1 11 2 70.42 6.59 1.3370 2 6 3 70.44 2.93 1.3367 5 3 2 70.49 2.93 1.3360 -4 10 2 71.01 3.99 1.3274 -3 11 2 71.49 1.50 1.3197 7 3 0 71.54 2.08 1.3189 -1 9 3 72.13 5.00 1.3095 -1 1 4 72.16 1.29 1.3091 1 13 1 72.72 8.07 1.3003 -7 5 1 73.26 1.39 1.2921 0 12 2 73.57 12.81 1.2875 -2 12 2 73.90 2.48 1.2825 -1 3 4 73.99 4.35 1.2812 0 0 4 74.13 1.56 1.2791 3 5 3 75.11 2.41 1.2648 4 12 0 75.20 5.86 1.2634 -4 0 4 78.57 2.32 1.2176 6 0 2 79.22 1.10 1.2092 2 12 2 80.72 5.71 1.1904 -5 11 2 81.13 1.11 1.1855 6 10 0 81.27 2.82 1.1838 8 0 0 81.81 1.16 1.1773 4 10 2 82.70 3.94 1.1669 2 0 4 83.29 3.20 1.1601 -6 10 2 84.06 1.35 1.1514 -8 4 2 87.02 1.03 1.1197 7 9 0 88.44 1.11 1.1053 -6 4 4 89.38 2.86 1.0962 0 16 1 89.47 2.14 1.0953 3 1 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.