Dickite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R060298 Dera P, Prewitt C T, Japel S, Bish D L, Johnston C T American Mineralogist 88 (2003) 1428-1435 Pressure-controlled polytypism in hydrous layered materials Sample: High pressure dickite at P = 4.1 GPa CELL PARAMETERS: 5.150000 8.940000 14.73600 90.00000 103.5800 90.00000 SPACE GROUP: Cc X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 12.37 100.00 7.1629 0 0 2 19.86 3.95 4.4704 0 2 0 20.00 28.81 4.4405 -1 1 1 20.33 34.33 4.3698 1 1 0 20.82 23.88 4.2674 0 2 1 21.55 53.70 4.1237 -1 1 2 22.45 10.69 3.9600 1 1 1 23.46 38.61 3.7924 0 2 2 24.65 7.75 3.6121 -1 1 3 24.86 64.83 3.5814 0 0 4 25.96 15.52 3.4317 1 1 2 27.32 4.03 3.2635 0 2 3 28.82 5.07 3.0975 -1 1 4 30.41 4.30 2.9386 1 1 3 32.01 6.08 2.7951 0 2 4 33.71 1.13 2.6579 -1 1 5 35.03 12.88 2.5612 1 3 0 35.07 8.55 2.5580 -2 0 2 35.50 6.19 2.5283 1 1 4 35.78 19.10 2.5088 -1 3 2 35.85 9.21 2.5044 2 0 0 37.26 1.14 2.4122 0 2 5 37.66 5.70 2.3876 0 0 6 38.72 43.94 2.3250 1 3 2 38.74 19.19 2.3238 -2 0 4 39.11 3.56 2.3025 -1 1 6 40.77 5.53 2.2124 -1 3 4 40.85 3.39 2.2084 2 0 2 41.31 1.18 2.1849 2 2 0 42.93 2.15 2.1061 0 2 6 45.81 2.31 1.9800 2 2 2 45.95 7.29 1.9744 -2 0 6 45.95 13.76 1.9744 1 3 4 46.84 1.56 1.9388 -2 2 5 47.96 4.07 1.8962 0 4 4 48.92 4.48 1.8611 -1 3 6 49.00 2.43 1.8582 2 0 4 49.26 1.89 1.8490 2 2 3 50.51 3.49 1.8061 -2 2 6 50.97 3.51 1.7907 0 0 8 51.86 1.23 1.7623 0 4 5 53.37 1.22 1.7158 2 2 4 54.36 1.10 1.6869 -2 4 1 54.49 1.90 1.6832 -2 4 2 54.77 1.66 1.6751 -3 1 3 54.81 1.46 1.6740 -2 2 7 54.99 1.47 1.6689 -1 5 2 55.04 2.98 1.6676 2 4 0 55.41 3.08 1.6575 1 5 1 55.64 8.07 1.6510 -2 0 8 55.66 16.11 1.6506 1 3 6 55.97 3.37 1.6420 -3 1 4 56.00 2.20 1.6412 3 1 0 56.52 1.72 1.6275 2 4 1 57.14 1.24 1.6113 1 5 2 57.15 1.70 1.6109 -2 4 4 57.94 1.76 1.5908 -3 1 5 58.05 1.50 1.5880 2 2 5 58.69 1.01 1.5724 -1 5 4 59.29 7.86 1.5578 -1 3 8 59.38 2.53 1.5557 2 0 6 59.67 1.24 1.5488 -2 2 8 61.39 1.55 1.5094 0 4 7 62.27 6.71 1.4901 0 6 0 62.37 13.85 1.4880 -3 3 2 62.76 1.26 1.4798 -2 4 6 63.26 3.12 1.4693 2 2 6 63.76 2.27 1.4589 0 6 2 63.85 1.45 1.4571 -3 3 4 63.87 3.56 1.4566 3 3 0 65.03 1.79 1.4334 -2 2 9 65.07 1.20 1.4326 0 0 10 66.55 1.12 1.4043 1 5 5 66.91 2.64 1.3975 0 4 8 67.25 1.98 1.3914 1 3 8 68.12 1.89 1.3758 0 6 4 68.18 2.49 1.3746 -3 3 6 68.24 1.39 1.3736 3 3 2 68.94 1.13 1.3613 2 2 7 70.87 1.29 1.3290 -2 2 10 71.46 11.54 1.3194 -1 3 10 71.55 6.08 1.3179 2 0 8 73.51 3.92 1.2876 -2 6 2 73.64 1.75 1.2856 -4 0 2 73.98 1.24 1.2806 2 6 0 75.16 1.01 1.2634 -3 3 8 75.23 1.35 1.2623 3 3 4 75.79 4.13 1.2544 -2 6 4 75.95 3.11 1.2522 4 0 0 76.88 1.62 1.2392 -1 7 1 77.18 2.00 1.2352 2 6 2 77.26 1.17 1.2342 -4 0 6 77.26 1.14 1.2341 -3 5 3 77.45 1.07 1.2316 -1 7 2 77.96 1.43 1.2248 -4 2 1 78.27 1.34 1.2207 -3 5 4 80.39 1.16 1.1938 0 0 12 80.61 1.75 1.1910 1 3 10 80.75 1.19 1.1894 -2 6 6 88.29 3.09 1.1062 -2 6 8 88.49 1.66 1.1042 4 0 4 88.49 1.66 1.1042 4 0 4 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.