Diadochite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern Peacor D R, Rouse R C, Coskren T D, Essene E J Clays and Clay Minerals 47 (1999) 1-11 Destinezite ("diadochite"), Fe2(PO4)(SO4)(OH)*6(H2O): its crystal structure and role as a soil mineral at Alum Cave Bluff,Tennessee Locality: Alum Cave Bluff, Tennessee, USA CELL PARAMETERS: 9.566421 9.730428 7.331000 98.67269 107.9445 64.06409 SPACE GROUP: P-1 X-RAY WAVELENGTH: 1.541838 2-THETA INTENSITY D-SPACING H K L 10.11 90.11 8.7489 0 1 0 10.69 97.70 8.2777 1 0 0 11.26 17.11 7.8616 1 1 0 12.69 9.64 6.9732 0 0 1 14.47 17.88 6.1207 -1 -1 1 16.10 31.06 5.5035 0 -1 1 16.40 16.81 5.4038 0 1 1 17.54 15.96 5.0548 -1 1 0 18.58 2.07 4.7730 1 2 0 18.73 21.74 4.7353 1 0 1 19.19 7.12 4.6226 1 1 1 20.29 64.47 4.3744 0 2 0 21.46 9.76 4.1388 2 0 0 21.77 75.14 4.0802 -2 0 1 22.61 12.88 3.9308 2 2 0 22.69 100.00 3.9169 -2 -2 1 23.80 10.86 3.7373 0 -2 1 24.21 1.60 3.6748 0 2 1 24.39 18.08 3.6484 1 2 1 24.85 6.52 3.5810 -1 0 2 24.91 4.61 3.5728 -1 -1 2 25.54 30.29 3.4866 0 0 2 26.51 1.54 3.3607 2 1 1 26.70 2.43 3.3369 -1 2 0 27.34 1.22 3.2599 0 -1 2 27.71 8.66 3.2182 0 1 2 27.73 25.12 3.2157 -2 1 1 27.89 10.96 3.1973 2 0 1 27.88 3.49 3.1986 1 3 0 28.52 13.06 3.1286 -1 2 1 28.62 1.59 3.1176 -2 0 2 28.74 2.28 3.1045 -1 1 2 28.97 3.43 3.0803 2 2 1 29.02 25.30 3.0750 -3 -2 1 29.17 2.52 3.0603 -2 -2 2 29.20 17.73 3.0568 -1 -3 1 30.26 1.32 2.9522 3 2 0 30.39 83.43 2.9395 1 0 2 30.64 24.84 2.9163 0 3 0 30.77 6.79 2.9044 1 1 2 30.77 5.01 2.9039 1 -2 1 31.43 14.33 2.8444 -3 0 1 32.21 6.75 2.7779 1 3 1 32.52 1.35 2.7518 0 -2 2 32.81 5.06 2.7279 -3 -1 2 33.02 9.22 2.7113 -3 -3 1 33.05 3.99 2.7086 0 -3 1 33.14 1.95 2.7019 0 2 2 33.25 3.64 2.6928 -3 -2 2 34.53 14.89 2.5961 2 3 1 35.55 6.84 2.5239 -3 0 2 35.84 2.05 2.5041 -2 2 1 36.46 4.14 2.4630 3 2 1 36.77 1.15 2.4429 -3 -3 2 37.17 2.91 2.4175 -1 -1 3 37.20 1.68 2.4156 -1 0 3 37.24 7.05 2.4132 -3 1 1 37.66 3.55 2.3869 -4 -2 1 37.67 1.10 2.3865 2 4 0 37.98 3.32 2.3676 2 0 2 38.03 1.13 2.3646 -3 1 0 38.11 3.02 2.3598 -1 3 1 38.72 2.00 2.3244 0 0 3 38.86 1.14 2.3163 -1 -4 1 38.94 3.20 2.3113 2 2 2 38.91 4.46 2.3135 -2 0 3 39.08 3.26 2.3033 1 -2 2 39.51 1.89 2.2796 -3 -4 1 39.71 6.64 2.2685 -4 -3 1 39.76 4.95 2.2659 2 -2 1 39.76 1.37 2.2659 1 -3 1 39.92 6.85 2.2570 0 -1 3 39.99 4.61 2.2531 -1 -2 3 40.12 1.79 2.2460 -4 -2 2 40.07 2.62 2.2487 -1 1 3 40.38 2.81 2.2324 4 1 0 40.31 1.27 2.2361 0 1 3 40.59 4.53 2.2215 3 4 0 40.91 1.09 2.2048 -3 1 2 41.17 1.99 2.1911 -3 -1 3 41.37 6.71 2.1813 1 4 1 41.68 1.61 2.1658 2 -1 2 42.00 1.85 2.1500 -4 0 1 42.71 3.98 2.1159 -3 -4 2 43.08 2.73 2.0983 3 -1 1 43.08 6.50 2.0982 0 -4 1 43.51 7.34 2.0787 1 1 3 43.52 1.73 2.0784 -3 0 3 43.57 6.20 2.0759 0 4 1 43.71 1.24 2.0694 4 0 0 43.98 1.28 2.0577 -1 -4 2 44.28 6.16 2.0445 -4 -4 1 44.37 4.66 2.0402 -3 -3 3 44.38 5.42 2.0401 -4 0 2 44.45 4.52 2.0369 0 2 3 44.82 2.82 2.0210 -2 3 0 45.16 10.45 2.0066 -2 3 1 45.32 1.78 1.9996 3 1 2 45.38 8.38 1.9972 1 -1 3 46.16 2.85 1.9654 4 4 0 46.33 1.59 1.9584 -4 -4 2 46.36 1.98 1.9575 1 2 3 46.64 2.38 1.9460 1 -3 2 47.09 3.89 1.9287 -2 -5 1 47.52 2.30 1.9121 4 3 1 47.66 6.08 1.9071 -3 -5 1 48.19 1.58 1.8870 -3 1 3 48.46 3.02 1.8771 1 5 0 48.64 1.29 1.8706 3 5 0 48.82 11.04 1.8642 -5 -2 2 48.86 1.47 1.8628 3 3 2 49.19 2.57 1.8511 4 0 1 49.66 3.57 1.8345 0 -3 3 49.88 2.63 1.8272 1 -2 3 49.88 4.05 1.8270 -2 -1 4 49.96 1.86 1.8243 -4 1 2 50.39 1.52 1.8099 -3 -5 2 50.55 6.62 1.8043 -5 -1 2 50.68 2.00 1.8002 -2 -5 2 50.64 1.89 1.8013 0 3 3 50.81 2.10 1.7957 2 2 3 52.30 8.43 1.7480 -5 -4 2 52.24 3.30 1.7498 0 5 0 52.58 1.26 1.7393 4 5 0 53.20 2.90 1.7204 -1 4 2 53.36 1.69 1.7159 0 -1 4 53.75 1.50 1.7042 5 4 0 53.93 1.10 1.6990 3 4 2 54.08 2.42 1.6945 -5 -3 3 53.92 4.27 1.6992 -3 3 1 54.25 1.53 1.6898 4 -1 1 54.46 2.42 1.6837 -5 0 2 54.42 1.60 1.6849 -3 3 0 54.50 3.43 1.6825 -2 -3 4 55.03 1.54 1.6675 4 1 2 55.00 4.50 1.6684 -2 4 0 55.47 1.27 1.6555 5 0 0 55.65 2.63 1.6505 -4 -2 4 56.26 3.87 1.6341 1 -3 3 56.40 1.24 1.6303 -4 -1 4 56.61 4.50 1.6247 -2 3 3 56.82 5.39 1.6192 1 0 4 57.21 1.20 1.6091 -5 -5 2 57.15 4.94 1.6107 1 1 4 57.20 1.73 1.6095 -1 2 4 57.25 1.97 1.6080 0 -4 3 57.39 1.20 1.6045 3 2 3 57.43 1.20 1.6035 3 -2 2 57.59 1.00 1.5993 2 6 0 57.92 5.42 1.5910 3 6 0 57.88 1.86 1.5920 2 -2 3 58.20 1.73 1.5842 -6 -3 1 58.20 4.81 1.5841 1 4 3 58.26 1.37 1.5826 3 -3 1 58.43 1.52 1.5784 3 0 3 59.01 2.51 1.5643 -2 4 2 59.38 1.73 1.5555 -3 -6 2 59.51 1.11 1.5523 0 5 2 60.03 4.17 1.5402 4 4 2 60.00 1.29 1.5409 3 3 3 60.27 3.21 1.5345 2 4 3 60.25 5.35 1.5350 -5 1 2 60.46 1.53 1.5302 -4 -4 4 60.54 2.13 1.5284 -2 -6 2 60.91 1.47 1.5198 -6 -1 1 61.10 1.21 1.5156 -5 1 0 61.37 2.50 1.5096 -5 -5 3 61.46 1.65 1.5077 6 2 0 62.34 1.17 1.4883 -6 -2 3 63.04 1.28 1.4736 -5 -6 1 63.22 3.82 1.4697 2 0 4 63.65 1.39 1.4610 -6 -5 1 63.73 1.22 1.4593 6 1 0 63.80 1.65 1.4579 -6 -5 2 63.99 1.75 1.4540 -4 1 4 64.18 3.65 1.4501 1 -4 3 64.38 1.28 1.4462 -3 4 0 64.52 1.13 1.4433 -1 -1 5 64.63 1.48 1.4411 -1 0 5 66.69 1.26 1.4014 -1 1 5 66.86 1.86 1.3983 -2 -5 4 67.02 1.34 1.3953 -6 -5 3 67.29 1.11 1.3905 4 3 3 67.38 1.19 1.3889 -3 -7 1 67.89 1.44 1.3796 6 0 0 68.19 2.66 1.3742 -4 -3 5 68.36 1.22 1.3712 4 0 3 68.41 1.05 1.3704 -5 -5 4 68.86 1.02 1.3626 6 4 1 69.16 1.58 1.3574 -6 -6 1 69.05 1.89 1.3592 3 6 2 69.50 1.48 1.3516 6 1 1 69.34 1.75 1.3542 4 -3 1 69.72 2.29 1.3479 -2 5 2 71.26 1.09 1.3223 -6 1 1 71.18 1.85 1.3237 -1 4 4 72.25 1.24 1.3067 -3 4 3 72.81 3.59 1.2981 4 6 2 73.79 1.42 1.2832 -6 1 0 74.13 3.36 1.2782 3 -4 2 75.37 2.97 1.2601 -2 -6 4 75.59 2.18 1.2570 -7 -1 3 76.13 2.76 1.2494 -4 -5 5 76.29 1.53 1.2473 -1 3 5 76.40 1.13 1.2458 0 -6 3 77.72 1.65 1.2278 6 6 1 78.00 1.22 1.2241 -5 -5 5 80.41 2.05 1.1934 -1 5 4 81.70 1.30 1.1778 6 0 2 81.70 1.30 1.1778 6 0 2 XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.