Cryolite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R050287 Hawthorne F C, Ferguson R B The Canadian Mineralogist 13 (1975) 377-382 Refinement of the crystal structure of cryolite CELL PARAMETERS: 5.402400 5.595900 7.756400 90.00000 90.27800 90.00000 SPACE GROUP: P2_1/n X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 19.59 43.71 4.5388 0 1 1 20.01 10.29 4.4444 -1 0 1 20.08 24.46 4.4299 1 0 1 22.91 47.74 3.8872 1 1 0 22.93 18.50 3.8833 0 0 2 25.63 8.43 3.4797 -1 1 1 25.68 6.34 3.4727 1 1 1 32.03 34.84 2.7966 0 2 0 32.57 75.85 2.7508 -1 1 2 32.66 68.90 2.7439 1 1 2 33.16 23.77 2.7031 2 0 0 36.18 7.44 2.4840 1 2 0 36.95 31.75 2.4338 2 1 0 38.03 7.92 2.3670 -1 2 1 38.07 19.06 2.3648 1 2 1 38.52 35.34 2.3382 -1 0 3 38.63 23.13 2.3318 1 0 3 38.75 13.71 2.3246 -2 1 1 38.83 29.42 2.3204 2 1 1 39.73 34.09 2.2694 0 2 2 40.61 11.68 2.2222 -2 0 2 40.75 8.24 2.2149 2 0 2 41.89 7.66 2.1572 -1 1 3 41.99 25.41 2.1522 1 1 3 43.22 19.55 2.0940 -1 2 2 43.28 9.50 2.0910 1 2 2 43.85 5.62 2.0652 -2 1 2 43.98 2.56 2.0593 2 1 2 46.75 100.00 1.9436 2 2 0 46.80 53.68 1.9417 0 0 4 47.89 9.29 1.8998 0 2 3 48.24 6.87 1.8866 -2 2 1 48.31 3.81 1.8844 2 2 1 50.91 1.45 1.7938 -1 2 3 51.00 7.45 1.7909 1 2 3 51.46 6.44 1.7760 -2 1 3 51.88 12.36 1.7626 1 3 0 52.15 4.02 1.7541 3 0 1 52.61 15.46 1.7398 -2 2 2 52.76 9.86 1.7353 1 1 4 53.28 24.87 1.7193 -1 3 1 53.31 7.94 1.7184 1 3 1 54.60 2.72 1.6807 0 3 2 54.85 10.66 1.6737 3 1 1 57.39 19.92 1.6057 -1 3 2 57.44 7.81 1.6043 1 3 2 57.81 27.19 1.5949 0 2 4 58.42 2.86 1.5796 -2 0 4 58.63 22.62 1.5744 2 0 4 58.77 43.06 1.5710 -3 1 2 58.93 21.67 1.5671 3 1 2 61.18 4.81 1.5148 3 2 0 61.26 1.28 1.5129 0 3 3 61.56 5.19 1.5062 -2 3 1 62.00 2.93 1.4967 0 1 5 62.11 1.18 1.4943 -1 0 5 62.24 4.36 1.4915 1 0 5 62.42 2.69 1.4876 -3 2 1 63.92 5.16 1.4562 1 3 3 65.32 1.40 1.4283 -2 3 2 65.42 2.86 1.4264 2 3 2 65.35 2.67 1.4277 3 1 3 66.90 6.89 1.3983 0 4 0 68.12 1.12 1.3762 0 4 1 68.17 15.13 1.3754 -2 2 4 68.36 12.65 1.3719 2 2 4 69.41 5.14 1.3538 1 4 0 69.54 3.79 1.3516 4 0 0 71.51 3.65 1.3191 2 3 3 71.58 6.56 1.3180 -1 2 5 71.72 1.89 1.3156 0 4 2 71.84 1.86 1.3138 4 1 0 72.00 2.31 1.3113 -2 1 5 72.35 3.15 1.3058 -1 3 4 72.35 2.02 1.3058 3 2 3 72.44 1.17 1.3043 1 3 4 72.98 1.89 1.2961 -4 1 1 74.19 1.92 1.2779 -4 0 2 76.44 2.35 1.2458 -4 1 2 76.71 3.89 1.2420 2 4 0 77.59 2.77 1.2301 -3 3 2 77.67 6.96 1.2291 -1 1 6 77.73 4.67 1.2282 3 3 2 77.81 5.67 1.2272 1 1 6 78.59 3.60 1.2169 4 2 0 78.74 3.45 1.2149 -2 2 5 79.78 1.21 1.2017 4 2 1 81.35 2.04 1.1824 2 4 2 82.40 2.65 1.1699 4 1 3 82.86 4.29 1.1647 1 3 5 83.28 1.01 1.1599 -3 3 3 83.25 1.54 1.1602 4 2 2 83.48 3.08 1.1576 3 3 3 83.86 1.04 1.1533 -3 1 5 84.20 2.11 1.1495 3 1 5 85.56 2.96 1.1347 0 4 4 86.91 3.11 1.1205 -2 4 3 87.04 1.14 1.1191 2 4 3 87.84 1.19 1.1110 -1 4 4 87.83 1.91 1.1111 -4 0 4 88.19 2.14 1.1075 4 0 4 88.68 1.76 1.1026 -4 2 3 89.41 1.28 1.0954 1 5 0 89.41 1.28 1.0954 1 5 0 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.