Pickeringite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern for R060108 Quartieri S, Triscari M, Viani A European Journal of Mineralogy 12 (2000) 1131-1138 Crystal structure of the hydrated sulphate pickeringite (MgAl2(SO4)4.22H2O): X-ray powder diffraction study CELL PARAMETERS: 6.184400 24.27150 21.22650 90.00000 100.3260 90.00000 SPACE GROUP: P2_1/c X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 5.66 3.17 15.8256 0 1 1 8.54 6.90 10.4374 0 0 2 9.30 34.69 9.5882 0 1 2 11.25 15.20 7.9128 0 2 2 13.31 1.37 6.6888 0 1 3 14.74 43.25 6.0362 0 2 3 15.27 5.39 5.8260 0 4 1 15.56 3.05 5.7178 -1 0 2 15.99 1.99 5.5654 -1 1 2 16.24 3.83 5.4788 -1 2 1 16.87 16.02 5.2752 0 3 3 16.97 2.80 5.2453 0 4 2 17.21 1.92 5.1723 -1 2 2 17.57 1.40 5.0668 1 2 1 18.01 54.51 4.9423 -1 1 3 18.20 15.59 4.8909 -1 3 1 18.22 1.58 4.8874 1 0 2 18.32 17.75 4.8605 1 3 0 18.57 100.00 4.7941 0 2 4 18.83 1.97 4.7275 0 5 1 19.11 17.29 4.6608 -1 2 3 19.40 33.72 4.5911 1 3 1 19.64 2.94 4.5334 1 2 2 20.24 6.45 4.4010 0 5 2 20.31 1.04 4.3853 0 3 4 20.41 15.68 4.3649 -1 0 4 20.64 17.20 4.3157 -1 4 1 20.74 58.70 4.2948 1 4 0 20.80 4.31 4.2826 -1 3 3 21.30 7.78 4.1832 1 3 2 21.42 26.54 4.1611 -1 4 2 21.43 9.39 4.1574 1 1 3 21.66 3.44 4.1145 0 1 5 21.70 22.57 4.1073 -1 2 4 21.71 29.46 4.1055 1 4 1 22.37 18.02 3.9857 1 2 3 22.45 2.39 3.9708 0 6 1 22.53 3.60 3.9564 0 4 4 22.58 26.79 3.9478 0 2 5 22.98 6.24 3.8805 -1 4 3 23.42 5.79 3.8077 -1 5 1 23.51 9.48 3.7933 1 5 0 23.65 32.31 3.7714 0 6 2 23.84 2.31 3.7414 1 3 3 24.05 5.79 3.7100 0 3 5 24.37 11.51 3.6610 1 5 1 24.44 2.20 3.6505 1 0 4 24.72 8.16 3.6099 1 1 4 24.78 1.27 3.6011 -1 2 5 25.19 1.22 3.5432 -1 4 4 25.52 1.09 3.4987 -1 5 3 25.53 91.09 3.4968 0 6 3 25.54 50.40 3.4957 1 2 4 25.66 3.25 3.4791 0 0 6 25.93 11.58 3.4439 0 1 6 25.93 3.52 3.4439 1 5 2 26.13 1.80 3.4179 -1 3 5 26.71 4.18 3.3444 0 2 6 26.85 23.61 3.3274 1 3 4 27.06 2.46 3.3020 -1 6 2 27.16 4.10 3.2901 0 7 2 27.21 3.74 3.2836 -1 0 6 27.29 11.27 3.2741 1 6 1 27.47 6.35 3.2540 -1 1 6 27.54 1.71 3.2455 -1 5 4 27.91 5.05 3.2028 -1 4 5 28.07 4.65 3.1845 1 5 3 28.21 15.02 3.1696 -1 2 6 28.33 9.81 3.1565 -1 6 3 28.59 1.86 3.1279 1 4 4 28.70 1.75 3.1160 1 6 2 28.83 3.55 3.1031 0 7 3 29.03 2.74 3.0816 1 2 5 29.14 6.94 3.0702 -2 0 2 29.20 4.78 3.0637 -2 1 1 29.41 12.49 3.0425 -1 3 6 29.43 1.34 3.0403 2 0 0 29.50 1.32 3.0335 0 8 0 29.65 3.71 3.0181 0 4 6 29.67 6.66 3.0167 2 1 0 29.91 2.48 2.9930 -2 2 1 30.18 10.35 2.9667 -2 1 3 30.18 7.04 2.9668 -1 6 4 30.25 3.28 2.9599 0 1 7 30.36 1.17 2.9491 2 2 0 30.41 1.37 2.9442 1 7 1 30.67 2.09 2.9200 1 6 3 30.86 5.35 2.9023 -2 2 3 30.93 1.61 2.8959 0 2 7 31.02 21.29 2.8878 -1 4 6 31.02 4.74 2.8877 0 7 4 31.21 8.86 2.8704 -2 3 2 31.34 2.38 2.8589 -2 0 4 31.35 2.65 2.8578 -1 7 3 31.41 5.11 2.8523 2 2 1 31.56 18.40 2.8393 -2 1 4 31.69 9.19 2.8277 0 5 6 31.69 7.03 2.8277 1 7 2 31.77 2.20 2.8207 1 4 5 31.89 3.83 2.8107 1 0 6 32.11 3.46 2.7921 1 1 6 32.16 1.22 2.7881 2 0 2 32.22 6.30 2.7827 -2 2 4 32.24 6.67 2.7808 0 8 3 32.37 7.25 2.7699 2 1 2 32.51 8.84 2.7587 2 3 1 32.51 6.03 2.7582 -1 6 5 32.74 3.59 2.7394 -2 4 2 32.76 2.55 2.7382 1 2 6 32.97 1.79 2.7213 -1 3 7 32.98 2.05 2.7197 -1 5 6 32.98 3.65 2.7197 -1 8 1 33.02 3.53 2.7173 2 2 2 33.05 7.26 2.7148 -1 7 4 33.29 6.44 2.6955 -2 3 4 33.47 4.69 2.6813 -2 4 3 33.49 28.15 2.6797 -1 8 2 33.53 1.03 2.6763 0 4 7 33.56 1.32 2.6742 0 9 1 33.68 5.13 2.6647 1 8 1 34.04 2.02 2.6376 0 6 6 34.06 1.22 2.6359 2 3 2 34.24 1.61 2.6226 0 8 4 34.40 3.60 2.6107 0 9 2 34.43 5.04 2.6089 -1 4 7 34.49 11.63 2.6042 2 1 3 34.86 5.01 2.5774 1 8 2 34.87 9.09 2.5765 2 5 0 35.10 9.15 2.5603 2 2 3 35.11 7.39 2.5595 -2 3 5 35.21 1.65 2.5522 -1 7 5 35.23 1.47 2.5510 0 2 8 35.24 10.10 2.5503 1 4 6 35.25 4.34 2.5493 -1 6 6 35.31 6.71 2.5452 -2 5 3 35.76 2.38 2.5146 -1 2 8 35.77 4.40 2.5138 1 7 4 35.82 8.93 2.5105 -2 1 6 36.09 1.83 2.4919 2 3 3 36.44 7.36 2.4689 -1 9 1 36.64 3.62 2.4558 0 7 6 36.83 2.67 2.4437 2 0 4 36.90 6.42 2.4389 -1 9 2 37.02 1.12 2.4314 2 1 4 37.04 2.50 2.4303 2 6 0 37.09 1.60 2.4268 0 10 0 37.37 3.26 2.4095 -2 3 6 37.57 7.07 2.3971 0 4 8 37.59 1.29 2.3956 0 9 4 37.78 7.26 2.3840 -1 7 6 37.87 2.52 2.3784 -1 9 3 38.07 1.28 2.3667 -1 4 8 38.54 4.96 2.3385 -2 1 7 38.61 1.45 2.3346 -2 6 4 38.68 1.39 2.3304 -2 4 6 38.93 6.33 2.3162 1 4 7 39.11 1.03 2.3061 -2 7 1 39.24 4.27 2.2987 -1 1 9 39.24 4.11 2.2983 0 5 8 39.29 4.47 2.2955 2 6 2 39.37 1.34 2.2914 0 10 3 39.45 5.17 2.2864 0 8 6 39.47 3.06 2.2858 2 7 0 39.60 11.56 2.2782 0 2 9 39.71 4.35 2.2722 1 9 3 39.78 3.21 2.2684 -1 2 9 39.90 2.64 2.2619 2 1 5 40.00 1.18 2.2562 -2 3 7 40.05 1.96 2.2539 1 10 0 40.19 7.02 2.2464 1 1 8 40.22 1.46 2.2446 -2 6 5 40.42 4.78 2.2339 -1 10 2 40.50 3.47 2.2296 0 3 9 40.53 1.30 2.2282 -1 8 6 40.68 2.17 2.2204 -1 3 9 41.13 1.29 2.1970 1 8 5 41.20 2.21 2.1934 -1 9 5 41.25 3.88 2.1909 -2 4 7 41.32 1.08 2.1872 2 3 5 41.41 2.01 2.1827 2 5 4 41.59 1.59 2.1736 1 10 2 41.68 1.74 2.1689 1 9 4 41.90 3.68 2.1581 -1 4 9 41.89 1.02 2.1585 0 11 2 42.50 1.01 2.1293 -2 7 5 42.55 2.14 2.1266 0 8 7 42.67 2.60 2.1210 -1 10 4 43.05 2.20 2.1030 0 11 3 43.16 1.62 2.0981 0 10 5 43.28 1.75 2.0923 -1 8 7 43.30 3.24 2.0916 2 6 4 43.34 1.04 2.0899 2 7 3 43.56 4.59 2.0798 0 1 10 43.63 1.56 2.0762 -1 11 1 43.69 1.23 2.0739 1 11 0 44.03 2.92 2.0583 -1 11 2 44.06 1.22 2.0573 0 2 10 44.14 1.47 2.0536 -2 4 8 44.16 1.27 2.0528 2 8 2 44.19 2.03 2.0515 1 11 1 44.31 3.35 2.0458 1 5 8 44.41 4.21 2.0416 2 3 6 44.42 3.74 2.0412 1 1 9 44.91 2.53 2.0199 1 2 9 45.08 11.38 2.0129 0 12 1 45.10 4.52 2.0121 0 6 9 45.13 2.26 2.0108 1 11 2 45.26 1.32 2.0053 -1 6 9 45.33 2.26 2.0022 -2 9 3 45.56 1.70 1.9928 2 4 6 45.61 1.62 1.9904 0 10 6 46.08 7.94 1.9715 -1 9 7 46.14 3.24 1.9690 -1 11 4 46.21 1.04 1.9661 3 3 0 46.34 7.15 1.9610 -1 8 8 46.42 1.12 1.9575 3 2 1 46.48 3.35 1.9551 1 11 3 46.60 4.98 1.9506 0 11 5 46.74 1.17 1.9449 -2 7 7 46.75 2.09 1.9447 -3 4 1 46.83 2.77 1.9415 -3 2 5 47.07 2.05 1.9320 1 8 7 47.38 1.28 1.9202 3 1 2 47.41 1.33 1.9190 1 12 0 47.62 1.02 1.9112 -3 3 5 47.76 1.30 1.9059 -3 0 6 47.76 2.36 1.9056 2 3 7 47.85 1.57 1.9024 3 2 2 48.02 2.71 1.8962 -3 5 2 48.13 1.65 1.8919 0 1 11 48.16 9.83 1.8908 -3 5 1 48.29 2.24 1.8860 -3 5 3 48.30 1.23 1.8855 -2 0 10 48.53 1.18 1.8773 -1 12 3 48.59 2.27 1.8751 0 9 8 48.62 22.07 1.8738 3 3 2 48.71 5.93 1.8706 -2 5 9 48.77 3.06 1.8685 1 1 10 48.98 2.37 1.8610 -3 5 4 48.99 2.50 1.8605 -1 9 8 49.03 3.60 1.8594 0 13 1 49.05 2.57 1.8587 -1 6 10 49.08 1.52 1.8575 -2 8 7 49.23 1.24 1.8521 1 2 10 49.50 2.60 1.8425 0 8 9 49.65 1.44 1.8373 3 2 3 49.72 4.02 1.8350 -1 12 4 49.83 3.29 1.8313 -1 11 6 49.85 2.99 1.8307 -3 6 1 49.99 2.92 1.8257 1 3 10 50.16 3.76 1.8201 0 12 5 50.38 1.17 1.8124 -2 6 9 50.41 3.13 1.8115 3 3 3 50.42 1.03 1.8112 0 4 11 50.43 1.94 1.8107 2 9 4 50.62 1.26 1.8043 -2 10 5 50.74 3.41 1.8006 -2 4 10 51.18 2.36 1.7861 -1 13 1 51.35 4.40 1.7805 2 3 8 51.41 4.71 1.7785 -1 5 11 51.62 1.38 1.7716 -2 8 8 51.67 2.20 1.7702 1 13 1 51.81 2.30 1.7657 3 2 4 51.91 1.73 1.7625 -3 7 3 52.04 1.61 1.7584 0 9 9 52.18 6.23 1.7539 -1 9 9 52.33 1.01 1.7494 -2 10 6 52.50 1.02 1.7439 1 13 2 52.52 1.25 1.7434 1 10 7 52.66 1.74 1.7391 3 6 2 52.79 1.25 1.7351 0 1 12 52.85 1.42 1.7334 0 14 0 52.89 1.69 1.7321 2 8 6 52.96 1.15 1.7301 2 11 2 53.02 2.54 1.7282 -1 6 11 53.04 1.72 1.7275 0 14 1 53.37 1.80 1.7176 -1 3 12 53.60 7.10 1.7107 -3 7 5 53.68 3.02 1.7084 2 5 8 53.83 1.15 1.7041 -3 8 2 54.09 1.09 1.6964 -2 9 8 54.25 1.66 1.6919 -2 12 1 54.28 1.21 1.6908 -3 4 8 54.37 2.01 1.6883 -1 4 12 54.43 1.07 1.6864 2 2 9 54.88 1.39 1.6739 -1 7 11 54.91 1.39 1.6728 -1 10 9 55.00 1.05 1.6705 3 3 5 55.01 8.84 1.6702 -3 7 6 55.33 4.66 1.6611 -2 11 6 55.79 1.28 1.6486 1 7 10 55.98 1.57 1.6434 3 4 5 56.20 1.44 1.6376 2 11 4 56.35 1.04 1.6334 -3 9 1 56.44 1.19 1.6312 1 9 9 56.47 1.13 1.6303 -3 9 3 56.65 5.96 1.6255 3 1 6 57.17 3.01 1.6121 -1 6 12 57.28 2.74 1.6090 -2 3 12 57.45 1.71 1.6047 -3 0 10 57.71 1.39 1.5980 0 6 12 57.83 1.11 1.5951 1 1 12 58.06 1.21 1.5894 -1 12 8 58.24 1.92 1.5848 1 2 12 58.64 1.40 1.5750 0 3 13 58.64 1.58 1.5750 -1 14 5 58.92 1.79 1.5682 1 3 12 58.92 1.02 1.5680 -1 13 7 58.94 2.30 1.5677 -1 7 12 59.58 1.24 1.5523 0 4 13 59.62 1.21 1.5514 -3 4 10 59.60 1.04 1.5519 0 9 11 59.72 1.56 1.5490 3 1 7 60.28 1.26 1.5359 1 15 2 60.40 1.02 1.5331 -4 1 1 60.62 1.01 1.5280 -3 10 5 60.92 5.01 1.5213 -1 12 9 61.11 1.89 1.5170 -1 15 4 61.38 3.24 1.5110 -2 3 13 61.46 1.90 1.5092 -1 1 14 62.49 2.52 1.4868 -1 15 5 63.31 1.94 1.4694 2 3 11 63.43 2.30 1.4669 3 2 8 63.83 1.10 1.4587 2 10 8 64.06 1.19 1.4539 -4 2 7 64.17 1.27 1.4517 -1 13 9 64.21 1.59 1.4509 2 4 11 64.76 1.15 1.4398 2 9 9 65.35 1.04 1.4283 1 11 10 66.08 1.29 1.4142 1 8 12 66.41 1.83 1.4080 -2 15 4 66.74 1.08 1.4019 -4 6 6 66.94 1.51 1.3981 2 13 6 67.52 1.10 1.3875 -2 15 5 67.66 1.42 1.3850 -1 17 2 68.11 1.69 1.3770 -4 6 7 68.32 1.03 1.3732 -2 13 9 68.40 1.31 1.3718 -2 8 13 68.47 1.18 1.3705 -4 3 9 68.52 1.07 1.3697 -4 8 4 69.15 1.03 1.3588 -2 1 15 69.12 1.16 1.3592 1 15 7 69.34 1.13 1.3554 -4 4 9 69.84 1.02 1.3470 -4 1 10 70.26 2.11 1.3399 -2 16 4 70.43 1.30 1.3371 0 18 2 71.46 1.04 1.3203 4 4 5 71.73 1.20 1.3160 1 6 14 72.09 1.20 1.3104 -2 5 15 72.30 1.48 1.3070 2 9 11 72.41 1.22 1.3052 3 14 1 73.05 1.34 1.2954 4 8 3 73.59 1.28 1.2872 -4 10 5 74.58 1.52 1.2726 -4 10 6 75.42 1.06 1.2604 -3 14 7 75.78 1.15 1.2553 -3 1 15 75.87 1.42 1.2541 1 12 12 76.45 1.15 1.2460 4 6 6 76.64 2.14 1.2434 1 6 15 77.80 1.22 1.2277 3 11 8 77.82 1.06 1.2274 3 13 6 78.68 1.28 1.2162 2 10 12 82.49 1.52 1.1693 -4 2 14 83.62 1.27 1.1563 3 14 7 83.62 1.27 1.1563 3 14 7 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.