Starkeyite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern R060321. Baur W H Acta Crystallographica 15 (1962) 815-826 Zur kristallchemie der salzhydrate. Die kristallstrukturen von MgSO4*4H2O (leonhardtit) und FeSO4*4H2O (rozenit) Locality: synthetic CELL PARAMETERS: 5.917728 13.59514 7.909149 90.00000 90.87023 90.00000 SPACE GROUP: P2_1/n X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 12.99 30.96 6.8358 0 1 1 13.07 18.99 6.7976 0 2 0 16.38 72.63 5.4255 1 1 0 17.24 7.47 5.1549 0 2 1 18.63 2.94 4.7726 -1 0 1 18.90 34.94 4.7036 1 0 1 19.75 3.64 4.5032 -1 1 1 19.93 100.00 4.4630 1 2 0 20.01 20.55 4.4450 1 1 1 22.52 65.82 3.9541 0 0 2 22.65 4.85 3.9319 0 3 1 23.03 2.58 3.8679 1 2 1 23.46 8.39 3.7968 0 1 2 24.78 10.32 3.5978 1 3 0 26.25 50.44 3.3988 0 4 0 27.36 8.25 3.2635 1 3 1 27.76 44.74 3.2169 -1 1 2 28.14 3.09 3.1745 1 1 2 30.02 7.84 2.9794 0 3 2 30.05 17.14 2.9766 -1 2 2 30.24 7.72 2.9585 2 0 0 30.35 38.02 2.9472 1 4 0 30.40 34.52 2.9429 1 2 2 30.96 6.61 2.8909 2 1 0 32.36 21.22 2.7685 -1 4 1 32.53 13.33 2.7548 1 4 1 32.85 15.34 2.7282 -2 1 1 33.04 3.69 2.7127 2 2 0 33.18 4.90 2.7022 2 1 1 33.54 2.36 2.6734 -1 3 2 33.86 5.44 2.6489 1 3 2 34.69 1.88 2.5879 0 1 3 34.84 6.11 2.5770 -2 2 1 35.14 24.45 2.5551 2 2 1 36.28 7.16 2.4773 2 3 0 36.38 1.27 2.4707 1 5 0 36.58 14.79 2.4577 0 2 3 37.15 25.76 2.4216 -1 0 3 37.58 4.33 2.3944 1 0 3 37.72 3.17 2.3863 -2 0 2 37.94 4.96 2.3727 -2 3 1 38.11 5.36 2.3625 -1 5 1 38.18 5.03 2.3582 1 1 3 38.24 1.27 2.3545 1 4 2 38.29 3.43 2.3518 2 0 2 38.31 12.15 2.3504 -2 1 2 38.88 8.50 2.3174 2 1 2 39.52 1.53 2.2812 -1 2 3 39.57 8.17 2.2786 0 3 3 39.80 25.19 2.2659 0 6 0 39.94 2.98 2.2584 1 2 3 40.06 2.77 2.2516 -2 2 2 40.44 2.09 2.2315 2 4 0 40.61 9.47 2.2225 2 2 2 41.47 3.55 2.1782 0 6 1 42.22 1.01 2.1413 2 4 1 42.33 2.86 2.1358 -1 3 3 42.84 2.64 2.1115 -2 3 2 43.06 1.60 2.1013 -1 5 2 43.32 1.04 2.0893 1 5 2 43.36 1.66 2.0874 2 3 2 44.26 2.07 2.0469 -1 6 1 45.91 2.94 1.9771 0 0 4 46.03 3.05 1.9722 -1 4 3 46.19 8.66 1.9660 0 6 2 46.27 5.04 1.9624 -2 1 3 46.94 5.77 1.9360 2 5 1 47.00 3.32 1.9336 2 1 3 47.70 3.15 1.9069 3 0 1 47.78 1.70 1.9038 -2 2 3 48.04 1.04 1.8942 3 2 0 48.50 11.54 1.8775 2 2 3 48.71 2.07 1.8699 -1 6 2 48.82 4.90 1.8659 -1 1 4 48.94 2.73 1.8615 1 6 2 50.47 3.13 1.8085 3 3 0 50.76 1.10 1.7989 -1 7 1 50.87 10.10 1.7951 1 7 1 50.91 1.70 1.7939 2 3 3 51.70 2.89 1.7683 -3 3 1 52.04 1.42 1.7576 -2 6 1 52.26 4.93 1.7506 2 6 1 52.61 3.47 1.7399 3 1 2 53.33 7.87 1.7181 -3 2 2 53.50 1.51 1.7129 -2 4 3 53.98 1.19 1.6987 3 2 2 54.80 1.03 1.6752 -1 7 2 54.91 1.60 1.6721 -3 4 1 55.24 3.43 1.6631 3 4 1 55.51 2.63 1.6555 -2 0 4 55.54 1.11 1.6545 -1 6 3 55.59 2.08 1.6534 -3 3 2 55.87 2.47 1.6458 1 6 3 55.96 2.65 1.6433 -2 1 4 56.33 9.65 1.6334 1 8 0 56.70 1.09 1.6236 2 7 0 57.52 2.46 1.6023 -2 5 3 57.97 2.03 1.5909 -3 0 3 58.15 3.20 1.5865 2 5 3 58.77 2.37 1.5711 0 1 5 58.90 2.18 1.5679 3 0 3 59.18 2.81 1.5612 3 5 1 59.27 1.65 1.5589 3 4 2 59.44 3.17 1.5550 -2 3 4 60.06 1.43 1.5405 0 2 5 60.26 2.10 1.5358 2 3 4 60.34 2.76 1.5338 -1 0 5 61.27 7.54 1.5128 1 1 5 61.47 5.63 1.5084 1 7 3 61.51 1.05 1.5074 1 8 2 61.56 3.86 1.5063 -2 7 2 62.32 1.46 1.4897 0 6 4 62.39 2.20 1.4883 -2 4 4 62.46 1.24 1.4868 -3 5 2 62.80 1.26 1.4795 2 6 3 63.06 1.80 1.4741 3 5 2 63.56 1.14 1.4636 1 9 0 64.24 7.40 1.4497 -4 1 1 64.39 4.25 1.4467 2 8 1 64.58 2.52 1.4430 1 3 5 65.56 1.18 1.4237 3 4 3 67.22 1.19 1.3924 -4 0 2 67.30 1.48 1.3911 -1 8 3 67.47 1.03 1.3880 -4 3 1 67.98 1.07 1.3787 3 1 4 67.97 1.19 1.3790 2 1 5 68.03 1.34 1.3778 -3 2 4 68.21 2.82 1.3747 -2 2 5 68.30 1.58 1.3731 -3 5 3 72.04 2.43 1.3106 0 9 3 72.33 1.21 1.3061 1 10 1 72.92 1.62 1.2969 0 6 5 73.43 1.01 1.2893 3 6 3 73.48 1.26 1.2885 -4 4 2 73.71 5.54 1.2850 -4 5 1 73.90 2.47 1.2821 2 8 3 74.72 1.29 1.2702 -1 6 5 74.87 2.15 1.2680 -1 2 6 75.43 1.18 1.2599 -2 7 4 75.41 1.24 1.2602 1 2 6 75.77 1.14 1.2550 1 10 2 77.25 1.21 1.2347 3 5 4 77.23 1.01 1.2349 2 5 5 77.77 2.07 1.2278 -3 8 2 80.07 3.03 1.1981 1 7 5 80.95 1.89 1.1873 -3 9 1 81.35 1.20 1.1824 3 3 5 85.23 1.13 1.1382 4 3 4 85.48 3.14 1.1356 -5 3 1 85.92 1.07 1.1308 5 3 1 89.21 1.03 1.0975 -2 11 2 89.21 1.03 1.0975 -2 11 2 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.