Arfvedsonite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern of R040127 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: 9.8910 18.0350 5.3173 90.000 103.732 90.000 SPACE GROUP: C2/m ATOM X Y Z OCCUPANCY ISO(B) Si 0.27380 0.08618 0.29170 0.960 0.456 Al 0.27380 0.08618 0.29170 0.040 0.456 Si 0.28640 0.17104 0.80180 1.000 0.479 Fe 0.00000 0.09205 0.50000 1.000 0.648 Fe 0.00000 0.18443 0.00000 0.880 0.604 Al 0.00000 0.18443 0.00000 0.073 0.604 Ti 0.00000 0.18443 0.00000 0.047 0.604 Fe 0.00000 0.00000 0.00000 0.760 0.643 Mn 0.00000 0.00000 0.00000 0.130 0.643 Mg 0.00000 0.00000 0.00000 0.110 0.643 Na 0.00000 0.27790 0.50000 0.921 1.212 Ca 0.00000 0.27790 0.50000 0.079 1.212 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 0.710 O 0.12010 0.17310 0.73320 1.000 0.883 OH 0.10740 0.00000 0.70670 1.000 0.731 O 0.36430 0.24730 0.79840 1.000 0.900 O 0.34400 0.12730 0.08270 1.000 0.734 O 0.33630 0.11720 0.58410 1.000 0.808 O 0.32620 0.00000 0.29880 1.000 0.941 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: 10.45163923 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 9.81 5.34 9.0175 0 2 0 10.43 100.00 8.4799 1 1 0 17.17 9.90 5.1653 0 0 1 17.40 17.00 5.0963 1 3 0 18.47 15.02 4.8041 2 0 0 19.69 10.79 4.5087 0 4 0 19.81 1.03 4.4821 0 2 1 20.95 4.11 4.2400 2 2 0 21.94 18.59 4.0504 1 1 1 22.08 5.93 4.0266 -2 0 1 22.92 1.93 3.8803 -1 3 1 26.06 59.32 3.4190 1 3 1 26.24 19.17 3.3967 0 4 1 27.12 33.86 3.2876 2 4 0 28.30 52.10 3.1534 3 1 0 29.54 10.25 3.0241 -3 1 1 29.72 1.27 3.0058 0 6 0 29.75 11.61 3.0033 -2 4 1 29.94 20.12 2.9849 2 2 1 31.65 23.73 2.8266 3 3 0 32.78 27.20 2.7324 -3 3 1 32.88 87.55 2.7243 1 5 1 34.11 1.43 2.6289 -1 1 2 34.52 56.61 2.5980 0 6 1 34.64 9.62 2.5895 2 4 1 35.22 2.30 2.5482 2 6 0 35.34 71.37 2.5401 -2 0 2 36.09 4.40 2.4885 1 7 0 36.18 1.14 2.4828 0 2 2 36.99 1.91 2.4304 -1 3 2 37.33 4.05 2.4087 -2 6 1 37.44 10.21 2.4021 4 0 0 37.56 6.03 2.3949 3 5 0 38.51 1.13 2.3379 1 1 2 38.53 26.53 2.3368 -3 5 1 38.71 7.88 2.3260 -4 2 1 38.80 1.77 2.3211 4 2 0 39.21 9.05 2.2978 -1 7 1 39.41 1.86 2.2861 3 3 1 39.60 17.55 2.2757 -3 1 2 40.77 5.78 2.2131 -2 4 2 41.22 2.14 2.1899 1 7 1 41.44 44.44 2.1790 2 6 1 42.16 9.79 2.1433 -3 3 2 42.24 2.84 2.1394 -1 5 2 42.57 5.44 2.1237 -4 4 1 43.55 23.00 2.0783 2 0 2 44.43 13.55 2.0390 3 5 1 45.03 14.56 2.0133 -4 0 2 46.28 1.99 1.9617 1 9 0 46.42 1.27 1.9561 4 2 1 46.94 3.49 1.9357 -3 5 2 47.59 2.57 1.9108 5 1 0 48.21 1.27 1.8874 2 4 2 48.44 11.81 1.8791 -4 6 1 48.86 1.68 1.8641 -1 9 1 49.59 2.53 1.8384 -4 4 2 49.80 3.42 1.8311 4 4 1 50.57 5.83 1.8051 1 9 1 50.61 10.07 1.8035 0 10 0 51.93 1.28 1.7608 -1 1 3 52.41 3.98 1.7457 -5 1 2 52.62 2.01 1.7394 1 7 2 53.20 2.15 1.7218 -5 5 1 53.99 1.14 1.6984 0 8 2 54.03 5.37 1.6973 -1 3 3 54.24 3.03 1.6912 0 2 3 54.33 5.69 1.6884 2 10 0 54.42 2.44 1.6861 -2 8 2 54.71 3.64 1.6777 -3 9 1 55.08 27.65 1.6673 4 6 1 55.94 3.25 1.6438 4 8 0 56.13 2.31 1.6386 -2 4 3 56.98 10.05 1.6162 1 11 0 57.28 1.69 1.6085 0 4 3 57.55 5.75 1.6014 6 0 0 58.07 18.74 1.5885 -1 5 3 58.34 5.52 1.5816 4 0 2 58.95 2.23 1.5667 2 10 1 59.89 1.08 1.5445 -6 4 1 60.35 12.44 1.5338 -6 0 2 60.39 1.16 1.5329 -3 5 3 60.65 2.28 1.5269 1 9 2 60.96 6.50 1.5197 5 5 1 61.04 20.74 1.5181 -2 6 3 61.72 8.97 1.5029 0 12 0 61.78 1.76 1.5016 -4 8 2 61.90 1.41 1.4990 -4 4 3 62.13 4.55 1.4940 0 6 3 62.20 2.90 1.4924 4 4 2 62.31 1.25 1.4901 2 2 3 62.57 1.51 1.4846 1 5 3 62.85 2.60 1.4787 0 10 2 63.23 6.12 1.4705 -2 10 2 63.77 3.92 1.4594 3 11 0 63.82 1.50 1.4585 -1 7 3 64.13 1.49 1.4521 -6 4 2 64.56 1.48 1.4434 -4 10 1 64.62 23.71 1.4423 -6 6 1 64.62 4.78 1.4422 4 10 0 65.49 2.12 1.4252 -5 3 3 66.55 2.12 1.4051 -4 6 3 67.51 9.24 1.3875 5 1 2 68.56 2.64 1.3687 7 1 0 68.94 3.72 1.3621 2 10 2 69.12 4.15 1.3589 -5 5 3 69.31 3.02 1.3557 5 3 2 69.65 6.64 1.3500 2 6 3 69.88 5.38 1.3461 1 11 2 70.04 2.91 1.3433 -4 10 2 70.35 1.54 1.3382 7 3 0 70.61 3.95 1.3339 -3 11 2 71.08 2.07 1.3263 -1 9 3 71.57 5.00 1.3184 -1 1 4 71.72 1.29 1.3159 1 13 1 71.77 8.22 1.3152 -7 5 1 72.81 1.38 1.2990 0 12 2 73.17 12.69 1.2935 -2 12 2 73.17 1.58 1.2934 3 5 3 73.31 4.36 1.2913 0 0 4 73.33 2.48 1.2911 -1 3 4 74.47 2.41 1.2741 4 12 0 74.75 5.81 1.2701 -4 0 4 77.18 2.40 1.2359 6 0 2 78.55 1.09 1.2179 2 12 2 79.86 2.90 1.2010 8 0 0 80.13 5.67 1.1977 -5 11 2 80.15 1.13 1.1975 6 10 0 80.83 1.17 1.1891 4 10 2 81.68 3.99 1.1789 2 0 4 82.57 3.19 1.1684 -6 10 2 83.04 1.37 1.1630 -8 4 2 85.81 1.04 1.1324 7 9 0 87.82 1.10 1.1116 -6 4 4 88.21 2.15 1.1077 3 1 4 88.86 2.81 1.1013 0 16 1 89.13 1.40 1.0987 5 5 3 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.