Selenium Foss O, Janickis V Dalton Transactions 1980 (1980) 624-627 Crystal structure of gamma-monoclinic selenium Locality: synthetic Note: structure known as gamma phase Note: gamma-monoclinic selenium is allotrope of cyclo-octaselenium _database_code_amcsd 0012427 CELL PARAMETERS: 15.0180 14.7130 8.7890 90.000 93.610 90.000 SPACE GROUP: P2_1/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 1938.162 Density (g/cm3): 4.329 MAX. ABS. INTENSITY / VOLUME**2: 16.07898131 RIR: 1.209 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 5.90 1.55 14.9882 1 0 0 2 11.81 2.66 7.4941 2 0 0 2 12.03 2.67 7.3565 0 2 0 2 15.72 24.19 5.6366 0 2 1 4 16.22 4.05 5.4630 -2 1 1 4 16.89 1.89 5.2498 2 2 0 4 17.03 1.80 5.2069 1 2 1 4 17.13 9.51 5.1752 2 1 1 4 18.76 1.63 4.7308 3 1 0 4 20.09 6.89 4.4196 2 2 1 4 20.25 7.67 4.3858 0 0 2 2 20.74 45.05 4.2826 -1 0 2 2 20.75 3.21 4.2807 0 3 1 4 20.80 8.35 4.2716 -3 1 1 4 21.41 14.52 4.1499 -1 3 1 4 21.47 77.25 4.1396 1 0 2 2 21.61 27.12 4.1119 -1 1 2 4 21.66 11.25 4.1037 2 3 0 4 21.77 10.82 4.0831 1 3 1 4 21.87 21.19 4.0638 3 1 1 4 22.31 12.15 3.9849 1 1 2 4 22.84 10.86 3.8936 -2 0 2 2 23.31 20.16 3.8162 -3 2 1 4 23.62 35.43 3.7672 -2 3 1 4 23.62 64.57 3.7671 0 2 2 4 23.75 33.86 3.7471 4 0 0 2 24.15 13.46 3.6854 2 0 2 2 24.20 15.95 3.6783 0 4 0 2 24.26 29.22 3.6688 2 3 1 4 24.28 6.23 3.6659 3 2 1 4 24.52 18.20 3.6311 4 1 0 4 25.45 2.82 3.4999 3 3 0 4 25.89 8.37 3.4413 -2 2 2 4 25.98 2.80 3.4298 -4 1 1 4 26.27 29.61 3.3921 0 4 1 4 26.81 17.65 3.3259 -1 4 1 4 26.88 82.82 3.3164 -3 1 2 4 27.00 5.30 3.3020 2 4 0 4 27.01 31.70 3.3012 -3 3 1 4 27.06 3.66 3.2950 2 2 2 4 27.09 18.45 3.2912 1 4 1 4 27.15 3.58 3.2849 4 1 1 4 27.65 25.37 3.2258 -1 3 2 4 27.86 58.92 3.2024 3 3 1 4 28.06 10.97 3.1803 -4 2 1 4 28.21 2.73 3.1634 1 3 2 4 28.57 21.40 3.1247 3 1 2 4 28.62 1.63 3.1189 -2 4 1 4 28.90 21.45 3.0893 -3 2 2 4 29.15 23.25 3.0638 4 2 1 4 30.01 3.36 2.9775 4 3 0 4 30.34 12.01 2.9463 2 3 2 4 30.38 4.05 2.9418 -4 0 2 2 30.48 1.36 2.9326 3 2 2 4 31.24 13.35 2.8634 -4 3 1 4 31.52 4.93 2.8387 -3 4 1 4 31.52 2.19 2.8385 -5 1 1 4 31.75 28.75 2.8183 0 4 2 4 32.01 1.40 2.7964 -3 3 2 4 32.08 30.15 2.7903 -1 4 2 4 32.08 4.94 2.7898 0 5 1 4 32.14 4.22 2.7851 1 1 3 4 32.23 6.82 2.7775 4 3 1 4 32.26 9.49 2.7751 3 4 1 4 32.39 23.05 2.7642 4 0 2 2 32.53 2.59 2.7526 -1 5 1 4 32.69 11.56 2.7390 2 5 0 4 32.74 18.72 2.7349 5 1 1 4 32.97 21.79 2.7167 4 1 2 4 33.16 5.49 2.7014 -1 2 3 4 33.28 9.24 2.6922 -5 2 1 4 33.45 7.22 2.6786 3 3 2 4 33.52 2.08 2.6738 -2 4 2 4 34.07 7.80 2.6318 -2 5 1 4 34.16 2.31 2.6249 4 4 0 4 34.45 1.37 2.6037 -2 2 3 4 34.45 16.75 2.6034 2 4 2 4 34.53 2.20 2.5976 2 5 1 4 34.67 12.23 2.5876 4 2 2 4 35.08 1.52 2.5577 5 3 0 4 35.11 22.83 2.5563 -3 1 3 4 35.25 13.78 2.5457 -4 4 1 4 35.40 1.85 2.5355 3 5 0 4 35.59 2.07 2.5228 -4 3 2 4 35.73 5.44 2.5133 -5 1 2 4 35.81 1.40 2.5078 2 2 3 4 35.94 1.32 2.4990 -1 3 3 4 35.95 5.94 2.4983 -3 4 2 4 35.95 6.41 2.4980 6 0 0 2 36.15 11.35 2.4848 4 4 1 4 36.48 8.05 2.4628 6 1 0 4 36.58 3.37 2.4568 -3 5 1 4 36.65 4.35 2.4522 0 6 0 2 36.71 2.33 2.4478 -3 2 3 4 36.78 3.36 2.4436 0 5 2 4 37.07 18.79 2.4253 -1 5 2 4 37.10 8.65 2.4234 3 1 3 4 37.23 4.19 2.4153 3 5 1 4 37.26 2.15 2.4132 3 4 2 4 37.31 5.44 2.4104 -6 1 1 4 37.31 14.91 2.4100 -5 2 2 4 37.39 2.64 2.4053 5 0 2 2 38.04 7.43 2.3654 6 2 0 4 38.33 1.81 2.3484 -4 1 3 4 38.41 8.75 2.3434 2 3 3 4 38.49 14.88 2.3389 -1 6 1 4 38.70 6.25 2.3268 1 6 1 4 38.84 11.90 2.3188 -6 2 1 4 38.92 5.06 2.3143 4 5 0 4 39.21 1.32 2.2974 -4 4 2 4 39.37 10.32 2.2888 0 4 3 4 39.41 2.28 2.2862 5 2 2 4 39.54 3.90 2.2794 -1 4 3 4 39.64 1.24 2.2739 -5 4 1 4 39.83 2.61 2.2635 -4 2 3 4 40.07 1.71 2.2503 6 2 1 4 40.23 1.24 2.2416 2 6 1 4 40.41 4.02 2.2319 -6 0 2 2 40.52 1.09 2.2261 -3 5 2 4 40.71 5.16 2.2165 4 5 1 4 40.84 1.83 2.2098 4 4 2 4 40.90 3.44 2.2067 -6 1 2 4 41.00 11.27 2.2013 3 6 0 4 41.09 3.58 2.1967 3 3 3 4 41.71 1.44 2.1653 3 5 2 4 41.83 18.31 2.1595 2 4 3 4 42.20 2.65 2.1413 -2 0 4 2 42.21 10.56 2.1412 7 0 0 2 42.22 1.85 2.1404 -4 3 3 4 42.25 1.58 2.1393 -5 1 3 4 42.32 1.15 2.1358 -6 2 2 4 42.67 3.49 2.1190 -2 1 4 4 42.77 3.66 2.1141 6 0 2 2 43.04 8.51 2.1015 0 2 4 4 43.08 20.07 2.0999 5 5 0 4 43.16 1.49 2.0961 -5 4 2 4 43.48 1.33 2.0815 1 7 0 4 43.62 9.60 2.0749 -2 6 2 4 43.63 7.99 2.0745 -5 2 3 4 43.64 8.38 2.0741 0 5 3 4 43.73 3.14 2.0698 2 0 4 2 43.80 1.87 2.0671 -1 5 3 4 43.81 3.44 2.0665 6 4 0 4 43.89 1.42 2.0629 -5 5 1 4 44.04 4.54 2.0562 -3 0 4 2 44.14 4.61 2.0518 4 6 0 4 44.19 4.77 2.0496 2 1 4 4 44.32 11.45 2.0440 0 7 1 4 44.37 1.58 2.0415 2 6 2 4 44.49 1.54 2.0364 -3 1 4 4 44.50 3.70 2.0359 4 3 3 4 44.52 1.54 2.0353 -6 4 1 4 44.59 2.05 2.0319 6 2 2 4 44.62 1.33 2.0309 7 1 1 4 44.66 1.38 2.0291 -7 2 1 4 44.78 2.85 2.0238 2 7 0 4 44.84 1.16 2.0213 1 7 1 4 45.36 4.36 1.9994 -1 3 4 4 45.40 4.44 1.9975 -4 4 3 4 45.59 2.49 1.9897 -3 6 2 4 45.76 3.76 1.9828 4 6 1 4 45.87 4.39 1.9785 -5 3 3 4 45.92 1.97 1.9764 2 5 3 4 45.94 2.15 1.9753 7 2 1 4 46.66 3.43 1.9466 -3 5 3 4 46.68 3.29 1.9459 3 6 2 4 46.73 1.39 1.9440 -6 1 3 4 46.79 3.88 1.9414 6 3 2 4 46.86 3.76 1.9390 -7 3 1 4 47.09 2.94 1.9300 -4 1 4 4 47.66 1.42 1.9081 -6 4 2 4 47.69 3.57 1.9069 2 3 4 4 47.97 1.05 1.8966 3 2 4 4 47.98 3.33 1.8963 -3 3 4 4 48.01 1.89 1.8950 -6 2 3 4 48.09 3.46 1.8919 7 3 1 4 48.32 4.92 1.8836 0 4 4 4 48.36 31.21 1.8820 -4 2 4 4 48.38 10.18 1.8815 -1 4 4 4 48.42 1.15 1.8798 -6 5 1 4 48.45 7.78 1.8789 0 6 3 4 48.47 1.71 1.8781 7 0 2 2 48.53 12.33 1.8758 5 3 3 4 48.59 4.24 1.8736 -1 6 3 4 48.86 3.79 1.8640 -5 4 3 4 48.89 4.30 1.8629 7 1 2 4 49.11 1.17 1.8550 1 6 3 4 49.24 2.29 1.8505 7 4 0 4 49.26 10.61 1.8500 -4 5 3 4 49.49 1.13 1.8416 -8 1 1 4 49.54 1.89 1.8401 -2 6 3 4 49.74 1.46 1.8332 4 7 0 4 49.80 1.83 1.8310 -7 3 2 4 49.80 6.22 1.8309 -7 4 1 4 49.87 4.84 1.8285 6 1 3 4 49.95 4.81 1.8258 2 7 2 4 50.05 5.39 1.8224 3 3 4 4 50.09 7.38 1.8210 -6 3 3 4 50.13 7.29 1.8197 7 2 2 4 50.25 3.99 1.8156 8 2 0 4 50.37 1.51 1.8116 -5 1 4 4 50.43 5.31 1.8094 -4 3 4 4 50.55 2.41 1.8056 -4 7 1 4 50.72 1.70 1.7998 -8 2 1 4 50.88 1.00 1.7948 -3 4 4 4 51.03 3.88 1.7899 -1 8 1 4 51.10 14.86 1.7875 4 2 4 4 51.19 9.32 1.7844 1 8 1 4 51.22 1.68 1.7834 4 7 1 4 51.25 1.21 1.7825 -3 6 3 4 51.29 4.43 1.7812 4 5 3 4 51.38 3.55 1.7783 -6 5 2 4 51.41 7.31 1.7774 5 4 3 4 51.71 4.25 1.7678 -5 6 2 4 51.85 14.18 1.7635 -8 0 2 2 52.01 1.62 1.7583 0 5 4 4 52.06 4.89 1.7567 8 2 1 4 52.06 1.32 1.7567 -1 5 4 4 52.07 1.14 1.7564 3 7 2 4 52.10 5.01 1.7554 -2 8 1 4 52.15 2.20 1.7539 7 3 2 4 52.28 3.29 1.7499 6 6 0 4 52.51 3.89 1.7429 -1 1 5 4 52.74 12.67 1.7356 3 6 3 4 52.87 5.70 1.7318 3 4 4 4 52.90 3.01 1.7308 -6 6 1 4 52.91 1.57 1.7306 -6 4 3 4 53.09 1.51 1.7251 6 3 3 4 53.09 5.08 1.7250 4 3 4 4 53.24 1.60 1.7206 -2 1 5 4 53.29 4.39 1.7190 5 0 4 2 53.32 4.73 1.7181 1 1 5 4 53.35 3.54 1.7171 5 6 2 4 53.36 5.45 1.7169 6 5 2 4 53.42 3.26 1.7152 -7 5 1 4 53.43 1.11 1.7149 -8 2 2 4 53.57 1.09 1.7108 -5 3 4 4 53.59 2.70 1.7102 -4 7 2 4 53.68 2.61 1.7075 -4 6 3 4 53.68 3.62 1.7074 5 1 4 4 53.71 8.11 1.7065 0 2 5 4 53.84 6.68 1.7027 -1 7 3 4 53.87 2.45 1.7018 6 6 1 4 53.92 6.50 1.7005 -3 8 1 4 54.03 7.38 1.6973 8 3 1 4 54.18 1.28 1.6929 2 5 4 4 54.40 18.07 1.6865 3 8 1 4 54.44 2.95 1.6855 -3 5 4 4 54.82 1.03 1.6747 -7 3 3 4 54.84 1.72 1.6741 8 1 2 4 54.85 3.46 1.6738 2 1 5 4 54.87 5.63 1.6731 4 7 2 4 54.89 2.05 1.6726 7 4 2 4 55.00 3.55 1.6694 8 4 0 4 55.15 1.97 1.6654 9 0 0 2 55.24 1.84 1.6629 -2 8 2 4 55.36 2.56 1.6595 -8 3 2 4 55.41 1.70 1.6582 -6 2 4 4 55.45 2.27 1.6572 -8 4 1 4 55.53 7.17 1.6548 9 1 0 4 55.61 7.20 1.6526 -1 3 5 4 55.69 11.91 1.6506 -6 6 2 4 55.80 1.80 1.6475 4 4 4 4 55.87 2.03 1.6456 2 8 2 4 55.99 3.18 1.6425 8 2 2 4 56.32 2.36 1.6336 -2 3 5 4 56.32 3.61 1.6335 -3 7 3 4 56.33 1.72 1.6333 -1 6 4 4 56.42 11.19 1.6307 -4 8 1 4 56.75 1.80 1.6223 5 3 4 4 56.88 2.22 1.6188 -4 1 5 4 57.03 5.10 1.6150 -9 2 1 4 57.03 1.51 1.6148 -8 1 3 4 57.11 4.07 1.6129 -2 6 4 4 57.11 8.78 1.6129 7 6 0 4 57.28 1.55 1.6083 6 7 0 4 57.33 3.89 1.6071 0 9 1 4 57.61 7.54 1.5999 -1 9 1 4 57.62 1.39 1.5998 -7 6 1 4 57.72 5.71 1.5972 2 9 0 4 57.72 4.55 1.5972 3 7 3 4 57.74 2.97 1.5968 -3 3 5 4 57.77 2.18 1.5960 1 9 1 4 57.87 1.98 1.5934 -6 7 1 4 57.99 4.20 1.5905 -9 0 2 2 58.00 3.27 1.5902 -8 4 2 4 58.00 1.93 1.5902 -4 2 5 4 58.03 2.30 1.5895 6 1 4 4 58.15 1.22 1.5864 -8 2 3 4 58.27 1.99 1.5834 0 4 5 4 58.30 4.39 1.5827 5 7 2 4 58.34 3.60 1.5817 2 6 4 4 58.39 4.60 1.5804 8 5 0 4 58.42 1.41 1.5798 9 2 1 4 58.53 4.42 1.5769 9 3 0 4 58.61 2.17 1.5751 -4 7 3 4 58.79 1.55 1.5707 6 7 1 4 58.88 4.61 1.5684 -9 3 1 4 59.01 1.33 1.5654 1 4 5 4 59.07 1.55 1.5638 5 6 3 4 59.13 1.78 1.5624 6 2 4 4 59.25 1.58 1.5595 -4 8 2 4 59.70 2.16 1.5488 -5 1 5 4 59.77 3.49 1.5472 -7 2 4 4 59.88 1.95 1.5446 -6 4 4 4 59.94 1.08 1.5432 4 1 5 4 60.03 6.18 1.5411 8 5 1 4 60.18 1.62 1.5375 -7 6 2 4 60.30 1.01 1.5348 -3 4 5 4 60.43 3.35 1.5319 8 4 2 4 60.69 3.85 1.5259 8 1 3 4 60.93 2.30 1.5205 1 9 2 4 60.95 1.29 1.5201 6 3 4 4 61.08 1.02 1.5171 9 4 0 4 61.52 2.25 1.5074 -1 5 5 4 61.57 1.17 1.5061 -7 3 4 4 61.77 1.72 1.5019 8 2 3 4 61.82 2.53 1.5006 -3 8 3 4 61.85 3.50 1.5000 -2 7 4 4 61.91 1.13 1.4988 10 0 0 2 62.15 1.63 1.4936 9 2 2 4 62.27 1.64 1.4910 7 6 2 4 62.50 1.04 1.4861 -8 4 3 4 62.50 1.15 1.4859 7 0 4 2 62.53 1.02 1.4855 -10 1 1 4 62.53 1.45 1.4853 3 4 5 4 62.81 2.21 1.4794 4 3 5 4 63.11 1.85 1.4731 4 6 4 4 63.22 1.28 1.4709 -8 0 4 2 63.29 1.99 1.4694 -6 8 1 4 63.54 1.34 1.4643 1 10 0 4 63.64 1.75 1.4622 8 5 2 4 63.90 1.31 1.4568 -1 1 6 4 63.96 2.71 1.4556 3 9 2 4 64.18 1.16 1.4511 -6 2 5 4 64.48 1.62 1.4451 -2 1 6 4 64.66 4.37 1.4415 -7 6 3 4 64.80 2.55 1.4388 -7 7 2 4 64.95 1.38 1.4358 -1 2 6 4 65.03 1.18 1.4342 -5 4 5 4 65.05 3.22 1.4339 0 2 6 4 65.33 2.15 1.4284 -10 3 1 4 65.41 3.68 1.4269 0 9 3 4 65.41 1.21 1.4268 0 6 5 4 65.56 1.09 1.4239 -9 3 3 4 66.10 1.43 1.4135 1 6 5 4 66.20 1.65 1.4118 5 3 5 4 66.22 1.29 1.4114 3 10 0 4 66.31 2.14 1.4096 5 9 1 4 66.33 1.88 1.4091 0 8 4 4 66.35 2.33 1.4089 -8 3 4 4 66.42 1.35 1.4076 5 6 4 4 66.75 1.45 1.4014 -3 2 6 4 66.78 2.14 1.4009 -5 8 3 4 67.23 1.33 1.3926 2 2 6 4 67.26 3.24 1.3919 -4 0 6 2 67.55 1.22 1.3867 -7 8 1 4 67.81 1.58 1.3821 8 0 4 2 68.27 1.79 1.3738 3 1 6 4 68.54 1.16 1.3691 7 8 1 4 68.62 2.17 1.3677 -4 2 6 4 69.05 3.01 1.3602 -1 4 6 4 69.28 5.19 1.3562 3 2 6 4 69.43 1.77 1.3537 3 6 5 4 69.83 1.05 1.3468 0 7 5 4 70.14 1.19 1.3417 6 3 5 4 70.62 1.40 1.3338 4 0 6 2 71.33 2.01 1.3223 -6 5 5 4 71.59 2.92 1.3181 -9 3 4 4 71.63 1.59 1.3175 -8 1 5 4 71.72 1.78 1.3161 1 11 1 4 71.95 1.02 1.3124 4 2 6 4 72.02 1.10 1.3113 7 7 3 4 72.06 2.90 1.3107 0 9 4 4 72.10 3.61 1.3100 -1 9 4 4 72.35 1.64 1.3060 1 10 3 4 72.69 1.16 1.3008 5 10 1 4 72.76 2.28 1.2997 -5 3 6 4 73.21 1.83 1.2928 -6 1 6 4 73.60 3.07 1.2870 11 3 1 4 74.23 1.37 1.2776 2 5 6 4 74.40 1.05 1.2752 -11 4 1 4 74.52 1.98 1.2733 5 9 3 4 74.61 2.10 1.2721 -9 6 3 4 74.94 1.59 1.2672 -6 6 5 4 75.66 1.20 1.2570 -1 6 6 4 75.79 1.08 1.2551 5 10 2 4 76.02 1.51 1.2519 -4 9 4 4 76.06 1.88 1.2513 -5 7 5 4 76.20 1.34 1.2493 3 5 6 4 76.27 2.89 1.2484 4 7 5 4 76.78 1.69 1.2414 -10 5 3 4 76.82 1.54 1.2408 5 3 6 4 77.04 1.40 1.2378 1 1 7 4 77.54 1.86 1.2312 -2 2 7 4 77.86 3.04 1.2268 -8 9 1 4 78.08 1.67 1.2239 -6 4 6 4 78.25 1.04 1.2217 -12 0 2 2 78.27 1.33 1.2215 5 11 0 4 78.57 1.13 1.2175 -12 1 2 4 78.66 1.33 1.2163 0 11 3 4 78.68 2.69 1.2161 -1 3 7 4 78.93 1.32 1.2129 8 9 1 4 79.07 1.17 1.2110 5 4 6 4 79.12 1.86 1.2105 -4 6 6 4 79.23 1.88 1.2091 -12 3 1 4 79.43 1.67 1.2065 -8 5 5 4 79.53 1.79 1.2052 -12 2 2 4 79.55 1.54 1.2050 -10 4 4 4 80.04 1.01 1.1989 -8 9 2 4 80.67 2.73 1.1910 11 6 0 4 80.70 1.88 1.1908 3 12 0 4 80.77 1.09 1.1899 10 5 3 4 80.84 1.45 1.1890 -3 11 3 4 81.00 1.03 1.1871 2 3 7 4 81.46 1.60 1.1815 -9 4 5 4 81.69 1.03 1.1787 -1 12 2 4 81.91 1.28 1.1761 -11 2 4 4 81.95 1.28 1.1756 2 7 6 4 81.96 1.49 1.1756 1 12 2 4 82.04 1.19 1.1746 -3 9 5 4 82.27 2.42 1.1719 -12 1 3 4 82.29 1.07 1.1716 11 6 1 4 82.46 1.33 1.1697 7 1 6 4 82.70 2.20 1.1668 12 2 2 4 82.72 2.52 1.1666 9 9 0 4 82.79 1.01 1.1659 -4 11 3 4 83.28 4.50 1.1602 7 6 5 4 83.37 1.07 1.1592 -10 8 1 4 84.21 2.33 1.1498 6 10 3 4 84.21 1.16 1.1497 12 5 0 4 84.28 1.30 1.1490 -13 1 1 4 84.29 1.59 1.1489 12 3 2 4 84.48 2.31 1.1468 -9 7 4 4 84.82 1.94 1.1430 6 9 4 4 85.10 1.53 1.1400 -9 9 2 4 85.33 1.96 1.1375 -5 11 3 4 85.37 1.81 1.1371 -7 9 4 4 85.68 1.14 1.1337 11 6 2 4 85.89 1.11 1.1316 12 5 1 4 85.91 1.65 1.1313 -9 1 6 4 86.06 1.92 1.1297 -8 10 2 4 86.17 1.85 1.1286 1 13 0 4 86.27 1.93 1.1276 -1 10 5 4 86.80 1.67 1.1220 5 12 1 4 86.99 1.66 1.1200 -1 13 1 4 87.01 1.10 1.1198 -12 4 3 4 87.46 1.21 1.1153 9 9 2 4 87.54 1.00 1.1144 -7 8 5 4 87.68 4.56 1.1130 11 2 4 4 88.04 1.32 1.1093 -3 10 5 4 88.17 2.23 1.1081 8 6 5 4 88.36 1.05 1.1062 7 10 3 4 88.95 1.70 1.1004 -9 9 3 4 89.03 1.75 1.0996 7 9 4 4 89.19 1.51 1.0981 9 7 4 4 89.35 1.11 1.0964 0 0 8 2 89.41 1.02 1.0959 0 13 2 4 89.51 1.50 1.0950 12 3 3 4 89.69 1.05 1.0932 -11 8 1 4 89.78 2.45 1.0924 11 7 2 4 89.85 1.12 1.0917 1 13 2 4 89.93 1.12 1.0909 8 3 6 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.