Prehnite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern of R040047 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: 4.6490 5.4888 18.5820 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: 6.436855758 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 9.52 3.00 9.2910 0 0 2 16.84 29.09 5.2640 0 1 1 19.09 34.19 4.6490 1 0 0 19.10 1.59 4.6455 0 0 4 21.37 12.64 4.1576 1 0 2 21.63 1.72 4.1080 0 1 3 25.10 40.17 3.5475 1 1 0 25.11 1.54 3.5460 0 1 4 25.56 91.18 3.4846 1 1 1 26.90 59.05 3.3141 1 1 2 27.14 47.68 3.2861 1 0 4 28.83 17.14 3.0970 0 0 6 29.01 100.00 3.0784 1 1 3 29.02 1.12 3.0774 0 1 5 31.74 36.42 2.8194 1 1 4 32.63 4.67 2.7444 0 2 0 34.06 19.38 2.6320 0 2 2 34.81 24.60 2.5775 1 0 6 34.97 79.34 2.5661 1 1 5 37.64 7.32 2.3898 0 1 7 38.08 17.59 2.3633 1 2 0 38.08 24.51 2.3629 0 2 4 38.40 14.90 2.3445 1 2 1 38.59 14.04 2.3330 1 1 6 38.74 3.57 2.3245 2 0 0 38.77 11.00 2.3228 0 0 8 40.87 6.64 2.2081 1 2 3 42.51 1.62 2.1264 2 1 1 42.53 5.59 2.1254 1 1 7 43.54 13.30 2.0788 2 0 4 43.56 6.09 2.0778 1 0 8 44.09 7.62 2.0540 0 2 6 44.80 2.17 2.0231 2 1 3 45.48 2.60 1.9943 1 2 5 46.73 9.28 1.9440 2 1 4 46.75 13.18 1.9433 1 1 8 47.02 2.13 1.9325 0 1 9 49.02 2.38 1.8582 0 0 10 49.12 10.72 1.8548 2 1 5 51.19 12.76 1.7844 1 1 9 51.52 42.74 1.7738 2 2 0 51.55 4.41 1.7730 0 2 8 51.79 2.37 1.7652 1 2 7 51.93 7.80 1.7608 2 1 6 52.13 3.65 1.7547 0 3 3 53.08 3.27 1.7255 1 0 10 53.85 8.88 1.7025 1 3 0 54.09 3.89 1.6954 1 3 1 54.82 1.17 1.6746 1 3 2 55.12 22.48 1.6663 2 1 7 55.47 1.29 1.6566 1 2 8 55.85 1.04 1.6461 1 1 10 55.96 5.18 1.6431 2 0 8 56.02 6.19 1.6416 1 3 3 56.02 2.61 1.6415 0 3 5 57.67 2.42 1.5985 1 3 4 58.65 5.64 1.5740 2 1 8 59.72 5.57 1.5485 0 0 12 59.74 18.25 1.5478 1 3 5 60.11 5.04 1.5392 2 2 6 60.14 9.21 1.5387 0 2 10 61.56 8.02 1.5065 0 3 7 62.47 2.58 1.4866 3 1 1 63.30 3.69 1.4691 1 0 12 63.71 4.71 1.4607 1 2 10 64.17 5.76 1.4514 2 0 10 64.24 5.09 1.4499 3 1 3 65.09 1.54 1.4331 1 3 7 65.76 1.97 1.4200 3 1 4 65.81 3.06 1.4192 1 1 12 66.30 14.51 1.4097 2 2 8 67.70 10.16 1.3841 3 1 5 68.29 1.76 1.3734 2 3 4 68.36 5.64 1.3722 0 4 0 68.53 1.03 1.3693 0 3 9 69.68 2.10 1.3494 3 2 0 69.73 2.38 1.3486 0 2 12 69.89 1.37 1.3459 3 2 1 71.11 2.34 1.3258 1 1 13 71.88 4.46 1.3135 1 3 9 72.48 1.45 1.3040 2 3 6 73.01 5.38 1.2958 3 2 4 73.05 4.27 1.2952 1 2 12 73.46 1.21 1.2891 3 0 8 73.48 1.47 1.2887 2 0 12 73.86 2.50 1.2830 2 2 10 75.01 1.84 1.2662 1 4 4 75.80 2.22 1.2550 3 1 8 76.65 2.22 1.2431 1 1 14 77.10 2.88 1.2371 3 2 6 78.19 1.18 1.2225 2 3 8 79.06 1.34 1.2112 1 4 6 79.24 2.42 1.2090 3 1 9 79.28 2.82 1.2084 0 1 15 80.75 1.25 1.1901 3 0 10 81.45 3.36 1.1817 2 4 0 81.46 4.30 1.1814 0 4 8 81.58 2.12 1.1801 3 3 1 82.24 2.14 1.1722 2 4 2 82.47 2.64 1.1695 1 1 15 82.71 1.67 1.1668 3 2 8 82.73 1.02 1.1665 2 2 12 83.10 2.12 1.1623 4 0 0 83.17 2.21 1.1615 3 3 3 84.59 2.17 1.1455 1 3 12 84.63 2.99 1.1452 2 4 4 86.34 2.33 1.1268 3 3 5 88.54 1.04 1.1044 4 1 4 89.53 1.34 1.0947 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.