Arfvedsonite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from single crystal data of R050516 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: 10.0070 18.0770 5.3320 90.000 104.101 90.000 SPACE GROUP: C2/m ATOM X Y Z OCCUPANCY ISO(B) Si 0.27380 0.08618 0.29170 0.960 0.460 Al 0.27380 0.08618 0.29170 0.040 0.460 Si 0.28640 0.17104 0.80180 1.000 0.485 Fe 0.00000 0.09205 0.50000 1.000 0.655 Fe 0.00000 0.18443 0.00000 0.880 0.610 Al 0.00000 0.18443 0.00000 0.073 0.610 Ti 0.00000 0.18443 0.00000 0.047 0.610 Fe 0.00000 0.00000 0.00000 0.760 0.651 Mn 0.00000 0.00000 0.00000 0.130 0.651 Mg 0.00000 0.00000 0.00000 0.110 0.651 Na 0.00000 0.27790 0.50000 0.921 1.223 Ca 0.00000 0.27790 0.50000 0.079 1.223 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 0.716 O 0.12010 0.17310 0.73320 1.000 0.893 OH 0.10740 0.00000 0.70670 1.000 0.739 O 0.36430 0.24730 0.79840 1.000 0.910 O 0.34400 0.12730 0.08270 1.000 0.741 O 0.33630 0.11720 0.58410 1.000 0.818 O 0.32620 0.00000 0.29880 1.000 0.951 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: 10.31904559 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 9.79 5.28 9.0385 0 2 0 10.35 100.00 8.5510 1 1 0 17.15 9.76 5.1713 0 0 1 17.32 16.88 5.1193 1 3 0 18.28 15.08 4.8527 2 0 0 19.64 10.67 4.5192 0 4 0 19.78 1.01 4.4886 0 2 1 20.78 4.13 4.2755 2 2 0 21.85 5.98 4.0676 -2 0 1 21.91 18.34 4.0563 1 1 1 22.82 1.92 3.8971 -1 3 1 26.02 58.55 3.4247 1 3 1 26.19 18.93 3.4029 0 4 1 26.96 33.84 3.3072 2 4 0 28.02 52.64 3.1846 3 1 0 29.19 10.42 3.0589 -3 1 1 29.55 11.62 3.0233 -2 4 1 29.65 1.25 3.0128 0 6 0 29.84 19.97 2.9946 2 2 1 31.38 23.91 2.8503 3 3 0 32.45 27.53 2.7592 -3 3 1 32.81 86.49 2.7295 1 5 1 34.00 1.42 2.6368 -1 1 2 34.45 55.95 2.6032 0 6 1 34.53 9.54 2.5973 2 4 1 35.06 2.29 2.5596 2 6 0 35.13 71.36 2.5548 -2 0 2 35.99 4.37 2.4956 1 7 0 36.13 1.13 2.4859 0 2 2 36.88 1.90 2.4375 -1 3 2 37.05 10.29 2.4264 4 0 0 37.14 4.02 2.4210 -2 6 1 37.30 6.06 2.4109 3 5 0 38.22 26.64 2.3549 -3 5 1 38.26 8.06 2.3527 -4 2 1 38.41 1.80 2.3434 4 2 0 38.48 1.11 2.3398 1 1 2 39.08 8.98 2.3048 -1 7 1 39.23 1.86 2.2965 3 3 1 39.26 17.72 2.2946 -3 1 2 40.56 5.79 2.2240 -2 4 2 41.14 2.11 2.1944 1 7 1 41.32 44.09 2.1851 2 6 1 41.83 9.89 2.1596 -3 3 2 42.12 2.82 2.1453 -1 5 2 42.13 5.52 2.1448 -4 4 1 43.48 22.69 2.0812 2 0 2 44.24 13.51 2.0474 3 5 1 44.55 14.88 2.0338 -4 0 2 46.14 1.27 1.9675 4 2 1 46.15 1.98 1.9669 1 9 0 46.61 3.52 1.9486 -3 5 2 47.09 2.64 1.9300 5 1 0 48.02 11.97 1.8946 -4 6 1 48.13 1.26 1.8904 2 4 2 48.31 1.03 1.8838 -5 3 1 48.71 1.67 1.8693 -1 9 1 49.12 2.56 1.8546 -4 4 2 49.51 3.43 1.8410 4 4 1 50.45 5.77 1.8090 1 9 1 50.49 9.98 1.8077 0 10 0 51.79 4.06 1.7651 -5 1 2 51.80 1.27 1.7648 -1 1 3 52.53 1.99 1.7420 1 7 2 52.64 2.20 1.7388 -5 5 1 53.88 1.13 1.7015 0 8 2 53.90 5.32 1.7011 -1 3 3 54.14 5.66 1.6940 2 10 0 54.17 2.99 1.6933 0 2 3 54.19 2.42 1.6926 -2 8 2 54.41 3.64 1.6862 -3 9 1 54.79 27.64 1.6754 4 6 1 55.58 3.26 1.6536 4 8 0 55.91 2.30 1.6446 -2 4 3 56.82 9.97 1.6203 1 11 0 56.93 5.89 1.6176 6 0 0 57.20 1.67 1.6106 0 4 3 57.92 18.55 1.5920 -1 5 3 58.13 5.49 1.5869 4 0 2 58.78 2.21 1.5708 2 10 1 59.18 1.10 1.5612 -6 4 1 59.57 12.78 1.5518 -6 0 2 60.04 1.17 1.5408 -3 5 3 60.54 2.25 1.5295 1 9 2 60.56 6.52 1.5288 5 5 1 60.80 20.65 1.5234 -2 6 3 61.33 1.78 1.5117 -4 8 2 61.42 1.42 1.5095 -4 4 3 61.56 8.89 1.5064 0 12 0 61.98 2.89 1.4973 4 4 2 62.03 4.50 1.4962 0 6 3 62.24 1.23 1.4915 2 2 3 62.50 1.48 1.4861 1 5 3 62.71 2.57 1.4815 0 10 2 62.99 6.09 1.4757 -2 10 2 63.37 1.52 1.4677 -6 4 2 63.49 3.90 1.4652 3 11 0 63.66 1.48 1.4618 -1 7 3 63.92 24.23 1.4563 -6 6 1 64.15 1.49 1.4518 -4 10 1 64.26 4.79 1.4496 4 10 0 64.86 2.15 1.4376 -5 3 3 66.07 2.14 1.4141 -4 6 3 67.19 9.22 1.3933 5 1 2 67.79 2.68 1.3824 7 1 0 68.49 4.19 1.3700 -5 5 3 68.79 3.67 1.3648 2 10 2 68.99 3.01 1.3613 5 3 2 69.55 6.54 1.3516 2 6 3 69.58 1.56 1.3512 7 3 0 69.58 2.93 1.3511 -4 10 2 69.73 5.31 1.3485 1 11 2 70.26 3.95 1.3397 -3 11 2 70.89 2.05 1.3293 -1 9 3 70.91 8.42 1.3291 -7 5 1 71.41 4.94 1.3209 -1 1 4 71.54 1.27 1.3189 1 13 1 72.64 1.36 1.3016 0 12 2 72.90 12.62 1.2976 -2 12 2 73.05 1.56 1.2954 3 5 3 73.16 2.45 1.2936 -1 3 4 73.21 4.30 1.2928 0 0 4 74.08 2.40 1.2798 4 12 0 74.24 5.83 1.2774 -4 0 4 76.73 2.41 1.2420 6 0 2 78.36 1.08 1.2203 2 12 2 78.91 2.97 1.2132 8 0 0 79.51 5.71 1.2055 -5 11 2 79.51 1.13 1.2054 6 10 0 80.55 1.16 1.1926 4 10 2 81.60 3.92 1.1798 2 0 4 81.80 3.22 1.1775 -6 10 2 81.89 1.41 1.1764 -8 4 2 85.01 1.05 1.1410 7 9 0 86.94 1.11 1.1205 -6 4 4 88.10 2.11 1.1088 3 1 4 88.60 2.78 1.1038 0 16 1 88.83 1.39 1.1016 5 5 3 89.76 2.14 1.0925 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.