Gearksutite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R050657 Marchetti F, Perchiazzi N American Mineralogist 85 (2000) 231-235 The crystal structure of gearksutite, CaAlF4(OH).H2O CELL PARAMETERS: 4.935853 6.808673 6.977561 101.1582 94.73669 110.0670 SPACE GROUP: P-1 X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 13.15 18.24 6.7556 0 0 1 14.30 9.02 6.2131 0 1 0 16.98 19.83 5.2326 0 -1 1 19.44 7.30 4.5752 1 0 0 19.45 100.00 4.5721 -1 1 0 23.39 9.43 3.8093 1 -1 1 23.67 4.54 3.7641 -1 1 1 25.24 33.51 3.5324 1 0 1 26.42 46.60 3.3778 0 0 2 26.92 33.55 3.3156 0 -1 2 28.18 3.48 3.1699 1 1 0 28.20 23.59 3.1674 -1 -1 1 28.21 38.98 3.1669 -1 2 0 28.67 14.54 3.1167 0 -2 1 28.77 2.19 3.1066 0 2 0 32.78 2.22 2.7344 -1 2 1 32.79 1.67 2.7336 1 -1 2 33.08 8.66 2.7103 0 1 2 33.20 1.55 2.7003 -1 1 2 33.94 12.71 2.6427 1 1 1 36.30 3.58 2.4761 1 -2 2 36.56 1.19 2.4595 -2 1 0 37.94 3.11 2.3729 -2 1 1 39.41 25.57 2.2876 2 0 0 39.43 5.70 2.2861 -2 2 0 39.51 5.72 2.2817 -2 0 1 39.50 4.80 2.2826 -1 -2 1 40.02 13.46 2.2539 2 -1 1 40.06 3.38 2.2519 0 0 3 40.55 4.50 2.2256 1 -3 1 40.67 3.79 2.2191 1 2 0 40.71 3.77 2.2173 -1 3 0 41.56 3.58 2.1739 -1 2 2 41.76 14.12 2.1637 -1 0 3 41.90 21.34 2.1570 -2 2 1 42.53 5.11 2.1263 0 -3 1 42.88 25.15 2.1099 -1 -2 2 43.48 18.00 2.0821 1 1 2 43.56 8.70 2.0786 -1 -1 3 43.78 4.83 2.0686 -2 1 2 43.71 2.27 2.0714 0 -2 3 43.72 16.08 2.0710 0 3 0 43.80 1.82 2.0676 2 0 1 44.64 2.14 2.0305 1 -1 3 44.80 2.11 2.0236 1 -3 2 45.12 2.05 2.0099 -1 1 3 45.24 6.90 2.0051 -1 3 1 46.02 7.82 1.9726 0 1 3 46.15 2.26 1.9673 -2 -1 1 46.12 1.11 1.9686 1 2 1 47.12 5.73 1.9292 2 1 0 47.17 34.36 1.9274 -2 3 0 47.76 2.01 1.9046 2 -2 2 47.83 34.77 1.9022 1 0 3 47.99 1.17 1.8961 2 -3 1 48.37 5.83 1.8820 -2 2 2 48.97 1.84 1.8604 0 3 1 50.06 14.75 1.8223 -1 -2 3 52.19 9.58 1.7527 -2 0 3 52.47 15.31 1.7442 0 -3 3 52.61 1.53 1.7399 1 -3 3 52.66 3.12 1.7384 2 -3 2 52.69 11.04 1.7373 0 -1 4 52.86 2.80 1.7322 -1 2 3 53.94 10.14 1.6998 1 -4 1 54.89 2.58 1.6727 -1 -3 2 54.84 5.21 1.6741 1 2 2 54.98 10.15 1.6703 1 3 0 55.43 1.22 1.6578 0 -2 4 55.87 1.24 1.6457 -2 -1 3 55.82 4.68 1.6472 0 2 3 56.97 2.90 1.6164 -2 3 2 57.04 2.83 1.6147 2 -2 3 57.69 4.03 1.5979 -3 2 1 57.67 5.48 1.5984 2 -1 3 58.21 2.93 1.5850 2 2 0 58.26 6.80 1.5837 -2 -2 2 59.10 2.65 1.5632 3 -2 1 60.06 1.16 1.5403 -1 -2 4 60.01 2.96 1.5417 2 1 2 60.15 1.89 1.5382 -1 -3 3 60.40 1.81 1.5325 -3 1 2 60.77 1.74 1.5240 -3 3 0 61.52 1.43 1.5072 1 0 4 62.27 3.02 1.4908 3 -3 1 62.36 1.42 1.4890 2 0 3 62.43 3.67 1.4875 1 -4 3 63.07 1.44 1.4739 1 -3 4 63.31 1.84 1.4689 2 2 1 63.87 14.09 1.4573 -1 3 3 64.36 1.11 1.4473 -2 1 4 64.84 6.77 1.4377 3 -2 2 67.19 4.91 1.3931 -3 1 3 68.49 2.07 1.3697 -3 0 3 68.59 3.49 1.3680 -3 4 0 68.69 1.78 1.3663 -3 -1 2 68.62 1.84 1.3675 1 3 2 68.89 2.36 1.3628 0 -2 5 69.15 2.26 1.3583 -1 -4 2 69.68 2.05 1.3492 -3 2 3 70.58 2.05 1.3341 1 -5 2 71.50 1.50 1.3192 -2 -2 4 71.84 2.71 1.3139 2 3 0 71.91 1.37 1.3127 3 0 2 72.29 1.21 1.3067 -1 -2 5 72.38 1.13 1.3054 1 -2 5 72.71 1.14 1.3003 1 -1 5 72.78 1.04 1.2992 0 4 2 73.09 1.82 1.2944 2 -5 2 74.75 2.82 1.2698 3 -3 3 75.11 2.64 1.2645 1 -5 3 76.67 1.54 1.2426 0 5 0 76.80 1.97 1.2408 -3 4 2 77.00 4.43 1.2380 2 -4 4 77.62 1.10 1.2297 -4 2 0 77.80 1.33 1.2273 -4 2 1 77.88 1.50 1.2263 -2 1 5 78.11 1.11 1.2232 -3 -2 2 78.14 1.79 1.2228 -2 4 3 79.40 1.31 1.2066 -4 1 0 79.33 2.01 1.2075 1 2 4 79.87 1.57 1.2007 -1 -4 4 80.74 1.45 1.1898 3 1 2 80.86 1.19 1.1884 -1 2 5 81.23 2.72 1.1839 -4 1 2 82.09 1.17 1.1736 0 5 1 83.45 1.29 1.1579 -1 5 2 83.53 1.26 1.1570 0 -1 6 84.21 3.24 1.1494 0 -2 6 84.73 1.93 1.1437 3 2 1 84.97 1.49 1.1410 -2 -4 1 85.36 2.67 1.1368 -1 0 6 86.29 2.69 1.1269 4 -2 2 88.90 2.22 1.1005 -3 1 5 88.90 2.22 1.1005 -3 1 5 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.