Prehnite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern of R050055 Balic-Zunic T, Scavnicar S, Molin G European Journal of Mineralogy 2 (1990) 731-734 Crystal structure of prehnite from Komiza Locality: Komiza CELL PARAMETERS: 4.6484 5.4898 18.5470 90.000 90.000 90.000 SPACE GROUP: P2cm ATOM X Y Z OCCUPANCY ISO(B) Ca 0.00000 0.76010 0.15070 1.000 1.900 Si 0.79900 0.50000 0.00000 1.000 1.600 Si 0.49000 0.25090 0.13020 1.000 1.600 Al 0.17900 0.00000 0.00000 1.000 1.700 Al -0.00200 0.26280 0.25000 0.830 1.800 Fe -0.00200 0.26280 0.25000 0.170 1.800 O -0.01800 0.73900 0.01960 1.000 2.100 O 0.61100 0.45900 0.07300 1.000 2.600 O 0.35000 0.03200 0.08250 1.000 1.400 O 0.24500 0.39200 0.17580 1.000 1.300 O 0.74500 0.13000 0.17660 1.000 2.700 OH 0.20600 0.96000 0.25000 1.000 2.000 OH 0.79000 0.56500 0.25000 1.000 1.700 X-RAY WAVELENGTH: 1.541838 BOUNDS ON TWO THETA: 5.0 90.0 LIMITS IMPOSED ON THE INDICES ARE: +/- 4 +/- 5 +/- 17 MAX. ABS. INTENSITY / VOLUME**2: 6.451261975 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 9.54 2.99 9.2735 0 0 2 16.84 29.14 5.2640 0 1 1 19.09 34.23 4.6484 1 0 0 19.14 1.58 4.6368 0 0 4 21.38 12.64 4.1556 1 0 2 21.65 1.72 4.1050 0 1 3 25.10 40.23 3.5475 1 1 0 25.14 1.54 3.5423 0 1 4 25.57 91.29 3.4843 1 1 1 26.91 59.09 3.3133 1 1 2 27.16 47.60 3.2828 1 0 4 28.88 17.07 3.0912 0 0 6 29.02 100.00 3.0769 1 1 3 29.05 1.12 3.0735 0 1 5 31.76 36.39 2.8175 1 1 4 32.62 4.68 2.7449 0 2 0 34.06 19.41 2.6320 0 2 2 34.86 24.52 2.5740 1 0 6 35.00 79.22 2.5638 1 1 5 37.70 7.29 2.3862 0 1 7 38.07 17.63 2.3636 1 2 0 38.10 24.52 2.3620 0 2 4 38.39 14.92 2.3446 1 2 1 38.63 14.00 2.3305 1 1 6 38.74 3.58 2.3242 2 0 0 38.84 10.95 2.3184 0 0 8 40.88 6.65 2.2077 1 2 3 42.52 1.62 2.1262 2 1 1 42.59 5.57 2.1228 1 1 7 43.56 13.30 2.0778 2 0 4 43.63 6.06 2.0747 1 0 8 44.12 7.60 2.0525 0 2 6 44.81 2.17 2.0225 2 1 3 45.51 2.60 1.9933 1 2 5 46.75 9.27 1.9433 2 1 4 46.81 13.13 1.9407 1 1 8 47.10 2.12 1.9293 0 1 9 49.12 2.37 1.8547 0 0 10 49.15 10.71 1.8538 2 1 5 51.27 12.70 1.7819 1 1 9 51.52 42.80 1.7738 2 2 0 51.60 4.40 1.7712 0 2 8 51.84 2.36 1.7638 1 2 7 51.97 7.79 1.7597 2 1 6 52.12 3.66 1.7547 0 3 3 53.17 3.25 1.7226 1 0 10 53.84 8.90 1.7027 1 3 0 54.09 3.89 1.6956 1 3 1 54.82 1.17 1.6747 1 3 2 55.17 22.43 1.6649 2 1 7 55.52 1.29 1.6551 1 2 8 55.94 1.04 1.6436 1 1 10 56.02 6.20 1.6416 1 3 3 56.03 5.16 1.6414 2 0 8 56.04 2.62 1.6411 0 3 5 57.67 2.43 1.5984 1 3 4 58.71 5.63 1.5726 2 1 8 59.76 18.26 1.5475 1 3 5 59.84 5.53 1.5456 0 0 12 60.15 5.04 1.5385 2 2 6 60.22 9.17 1.5368 0 2 10 61.59 8.01 1.5057 0 3 7 62.48 2.58 1.4864 3 1 1 63.42 3.67 1.4666 1 0 12 63.79 4.69 1.4591 1 2 10 64.25 5.73 1.4497 2 0 10 64.25 5.10 1.4496 3 1 3 65.12 1.54 1.4324 1 3 7 65.78 1.97 1.4196 3 1 4 65.92 3.05 1.4169 1 1 12 66.36 14.49 1.4087 2 2 8 67.72 10.16 1.3836 3 1 5 68.30 1.76 1.3733 2 3 4 68.35 5.65 1.3724 0 4 0 68.58 1.02 1.3683 0 3 9 69.69 2.11 1.3493 3 2 0 69.84 2.37 1.3468 0 2 12 69.90 1.37 1.3458 3 2 1 71.24 2.33 1.3237 1 1 13 71.93 4.45 1.3126 1 3 9 72.51 1.45 1.3037 2 3 6 73.03 5.38 1.2956 3 2 4 73.16 4.25 1.2936 1 2 12 73.51 1.21 1.2882 3 0 8 73.60 1.46 1.2870 2 0 12 73.94 2.49 1.2819 2 2 10 75.01 1.85 1.2662 1 4 4 75.86 2.21 1.2542 3 1 8 76.80 2.21 1.2411 1 1 14 77.13 2.88 1.2366 3 2 6 78.24 1.18 1.2219 2 3 8 79.07 1.34 1.2111 1 4 6 79.30 2.42 1.2081 3 1 9 79.45 2.80 1.2062 0 1 15 80.83 1.25 1.1891 3 0 10 81.44 3.36 1.1818 2 4 0 81.50 4.30 1.1810 0 4 8 81.58 2.13 1.1801 3 3 1 82.24 2.14 1.1723 2 4 2 82.64 2.62 1.1676 1 1 15 82.76 1.66 1.1662 3 2 8 82.84 1.02 1.1653 2 2 12 83.12 2.12 1.1621 4 0 0 83.17 2.22 1.1614 3 3 3 84.63 3.00 1.1452 2 4 4 84.70 2.16 1.1444 1 3 12 86.36 2.33 1.1266 3 3 5 88.56 1.04 1.1042 4 1 4 89.65 1.34 1.0936 1 3 13 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.