Rossmanite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern Selway J B, Novak M, Hawthorne F C, Cerny P, Ottolini L, Kyser T K American Mineralogist 83 (1998) 896-900 Rossmanite, _(LiAl2)Al6(Si6O18)(BO3)3(OH)4, a new alkali-deficient tourmaline: Description and crystal structure CELL PARAMETERS: 15.82263 15.82263 7.093792 90.00000 90.00000 120.0000 SPACE GROUP: R3m X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 11.19 19.53 7.9113 1 1 0 14.06 30.94 6.2997 1 0 1 18.00 25.68 4.9281 0 2 1 19.43 9.99 4.5676 3 0 0 21.24 62.73 4.1830 2 1 1 22.47 100.00 3.9557 2 2 0 25.94 55.78 3.4337 0 1 2 26.60 18.92 3.3500 1 3 1 28.94 8.51 3.0848 4 0 1 29.87 15.29 2.9902 4 1 0 30.54 72.82 2.9264 1 2 2 31.11 3.44 2.8741 3 2 1 34.58 6.99 2.5930 3 1 2 35.09 98.02 2.5564 0 5 1 36.94 2.04 2.4326 2 4 1 38.04 11.70 2.3646 0 0 3 38.24 14.91 2.3526 2 3 2 38.71 26.68 2.3251 5 1 1 39.44 2.15 2.2838 6 0 0 41.63 10.18 2.1686 5 0 2 42.06 10.88 2.1471 4 3 1 43.06 6.31 2.0999 0 3 3 43.06 4.37 2.0999 3 0 3 43.24 8.11 2.0915 4 2 2 44.62 12.20 2.0296 2 2 3 44.80 37.00 2.0220 1 5 2 45.21 6.65 2.0045 1 6 1 45.86 1.90 1.9778 4 4 0 47.81 34.32 1.9016 3 4 2 48.20 2.38 1.8870 3 5 1 48.20 2.19 1.8870 7 0 1 49.09 5.85 1.8547 1 4 3 49.09 1.98 1.8547 4 1 3 49.64 8.53 1.8355 6 2 1 50.24 1.65 1.8150 7 1 0 50.68 1.30 1.8004 6 1 2 51.91 5.96 1.7605 3 3 3 51.96 4.15 1.7588 1 0 4 53.01 1.46 1.7264 6 3 0 53.33 1.65 1.7169 0 2 4 53.43 1.11 1.7139 5 3 2 54.77 3.40 1.6750 2 6 2 55.94 20.09 1.6427 0 6 3 55.94 2.77 1.6427 6 0 3 56.44 15.91 1.6293 2 7 1 58.28 15.11 1.5823 5 5 0 58.58 3.57 1.5749 4 0 4 58.67 3.65 1.5726 4 5 2 59.01 2.84 1.5643 8 1 1 59.84 1.70 1.5446 3 2 4 60.27 5.59 1.5346 4 6 1 60.80 6.47 1.5225 9 0 0 61.18 5.63 1.5139 7 2 2 61.52 1.58 1.5065 7 3 1 62.04 4.28 1.4951 8 2 0 62.33 14.74 1.4889 0 5 4 63.55 4.12 1.4632 2 4 4 63.64 1.41 1.4613 1 8 2 64.71 4.41 1.4398 1 7 3 64.75 16.05 1.4388 5 1 4 64.84 5.90 1.4370 6 4 2 65.67 4.22 1.4209 7 4 0 66.18 2.61 1.4112 0 1 5 66.36 7.58 1.4079 6 5 1 66.36 2.91 1.4079 1 9 1 67.09 2.16 1.3943 3 6 3 67.09 5.03 1.3943 6 3 3 67.13 15.22 1.3935 4 3 4 67.36 1.23 1.3893 2 0 5 68.71 1.68 1.3653 3 8 1 69.87 10.98 1.3454 10 0 1 70.71 3.81 1.3314 5 6 2 71.02 1.08 1.3264 9 2 1 71.51 4.94 1.3186 6 6 0 71.73 3.69 1.3150 5 5 3 71.77 1.13 1.3143 7 0 4 71.77 3.51 1.3143 3 5 4 72.00 4.08 1.3108 0 4 5 72.65 12.43 1.3006 10 1 0 72.92 2.13 1.2965 6 2 4 73.00 2.75 1.2952 8 3 2 73.14 2.60 1.2932 2 3 5 73.31 1.47 1.2906 5 7 1 74.00 1.06 1.2801 9 0 3 74.13 1.63 1.2782 0 10 2 74.44 1.28 1.2737 8 4 1 74.91 5.33 1.2668 9 3 0 75.13 2.05 1.2637 2 8 3 75.39 11.56 1.2599 5 0 5 76.30 4.37 1.2473 5 4 4 77.79 4.41 1.2269 0 11 1 78.61 1.81 1.2163 4 8 2 78.90 1.47 1.2124 2 10 1 79.84 2.69 1.2005 3 4 5 81.33 1.68 1.1823 0 0 6 82.04 1.37 1.1738 6 1 5 82.21 3.02 1.1719 11 1 1 84.61 1.49 1.1446 3 0 6 85.07 6.44 1.1396 10 1 3 87.25 2.08 1.1167 9 3 3 87.29 1.75 1.1162 6 5 4 87.29 1.75 1.1162 6 5 4 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.