Cechite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from single crystal data of R070363 Pertlik F Neues Jahrbuch fur Mineralogie, Monatshefte 1989 (1989) 34-40 The crystal structure of cechite, Pb(Fe,Mn)(VO4)(OH) with Fe>Mn. A mineral of the descloizite group Locality: Vrancice, Bohemian pluton, Pribram, Czechoslovakia (Czech Republic) _database_code_amcsd 0014834 CELL PARAMETERS: 7.6340 9.4860 6.1340 90.000 90.000 90.000 SPACE GROUP: Pnam ATOM X Y Z OCCUPANCY ISO(B) Pb 0.13061 0.17430 0.25000 1.000 1.408 Fe 0.50000 0.00000 0.00000 0.800 1.013 Mn 0.50000 0.00000 0.00000 0.200 1.013 V 0.86470 0.19070 0.75000 1.000 0.897 O 0.87510 0.29380 0.51130 1.000 1.384 O 0.03990 0.08510 0.75000 1.000 2.053 O 0.68650 0.07580 0.75000 1.000 1.137 OH 0.65070 0.06930 0.25000 1.000 0.984 X-RAY WAVELENGTHS: 1.540562 1.544390 BOUNDS ON TWO THETA: 5.0 90.0 LIMITS IMPOSED ON THE INDICES ARE: +/- 7 +/- 8 +/- 5 MAX. ABS. INTENSITY / VOLUME**2: 81.92192246 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 17.20 / 17.24 67.60 / 33.80 5.1509 0 1 1 18.69 / 18.74 18.60 / 9.30 4.7430 0 2 0 20.79 / 20.84 39.98 / 19.99 4.2699 1 1 1 22.05 / 22.10 20.31 / 10.16 4.0287 1 2 0 23.28 / 23.34 1.62 / 0.81 3.8170 2 0 0 25.13 / 25.19 25.97 / 12.99 3.5411 2 1 0 26.45 / 26.51 18.50 / 9.25 3.3674 1 2 1 27.50 / 27.57 100.00 / 50.00 3.2408 2 0 1 29.09 / 29.17 30.67 / 15.34 3.0670 0 0 2 30.03 / 30.10 5.98 / 2.99 2.9737 2 2 0 30.58 / 30.65 53.95 / 26.98 2.9213 1 3 0 32.83 / 32.91 38.40 / 19.20 2.7259 1 1 2 33.46 / 33.55 45.81 / 22.91 2.6758 2 2 1 33.96 / 34.05 58.53 / 29.26 2.6375 1 3 1 34.81 / 34.89 20.67 / 10.33 2.5755 0 2 2 36.53 / 36.62 7.53 / 3.77 2.4578 3 1 0 36.80 / 36.89 5.79 / 2.90 2.4403 1 2 2 36.88 / 36.98 1.72 / 0.86 2.4350 2 3 0 37.59 / 37.69 4.51 / 2.26 2.3908 2 0 2 38.81 / 38.91 39.03 / 19.52 2.3183 2 1 2 39.46 / 39.57 2.83 / 1.42 2.2814 3 1 1 39.77 / 39.87 12.06 / 6.03 2.2647 1 4 0 40.18 / 40.29 6.23 / 3.11 2.2423 3 2 0 42.30 / 42.41 2.18 / 1.09 2.1349 2 2 2 42.52 / 42.63 12.14 / 6.07 2.1246 1 4 1 42.71 / 42.82 14.87 / 7.43 2.1153 1 3 2 42.91 / 43.02 11.04 / 5.52 2.1060 3 2 1 44.96 / 45.08 1.37 / 0.68 2.0144 2 4 0 45.33 / 45.45 6.63 / 3.32 1.9988 0 1 3 45.73 / 45.85 5.78 / 2.89 1.9824 3 3 0 46.95 / 47.08 4.40 / 2.20 1.9336 1 1 3 47.47 / 47.59 2.07 / 1.04 1.9138 2 4 1 47.61 / 47.73 8.17 / 4.08 1.9085 4 0 0 48.20 / 48.33 14.20 / 7.10 1.8864 3 3 1 48.48 / 48.61 6.58 / 3.29 1.8761 0 4 2 49.98 / 50.11 3.11 / 1.55 1.8233 1 2 3 50.02 / 50.16 6.35 / 3.18 1.8219 1 4 2 50.30 / 50.43 5.06 / 2.53 1.8125 0 5 1 50.37 / 50.50 3.79 / 1.90 1.8101 3 2 2 50.60 / 50.74 15.48 / 7.74 1.8024 2 0 3 50.99 / 51.12 10.28 / 5.14 1.7896 4 1 1 51.58 / 51.72 12.87 / 6.44 1.7705 4 2 0 51.80 / 51.94 9.10 / 4.55 1.7635 1 5 1 52.72 / 52.86 2.44 / 1.22 1.7349 3 4 0 53.92 / 54.07 2.93 / 1.47 1.6989 2 5 0 54.41 / 54.56 9.09 / 4.55 1.6848 2 2 3 54.45 / 54.60 1.23 / 0.61 1.6837 2 4 2 54.75 / 54.90 13.70 / 6.85 1.6751 1 3 3 54.96 / 55.10 4.32 / 2.16 1.6694 3 4 1 55.12 / 55.27 28.42 / 14.21 1.6649 3 3 2 56.77 / 56.92 14.28 / 7.14 1.6204 4 0 2 58.31 / 58.47 4.93 / 2.47 1.5810 0 6 0 58.41 / 58.57 12.70 / 6.35 1.5786 1 5 2 60.30 / 60.47 9.94 / 4.97 1.5335 0 0 4 60.31 / 60.48 1.40 / 0.70 1.5334 4 2 2 60.85 / 61.02 6.16 / 3.08 1.5210 3 5 0 61.00 / 61.17 3.30 / 1.65 1.5177 1 4 3 61.31 / 61.47 3.18 / 1.59 1.5109 3 2 3 61.34 / 61.51 1.38 / 0.69 1.5100 3 4 2 61.46 / 61.63 1.94 / 0.97 1.5074 5 1 0 62.41 / 62.58 1.41 / 0.70 1.4868 4 4 0 62.44 / 62.61 3.06 / 1.53 1.4861 2 5 2 62.90 / 63.08 3.93 / 1.96 1.4763 3 5 1 63.50 / 63.67 2.13 / 1.07 1.4638 5 1 1 63.73 / 63.90 1.12 / 0.56 1.4591 0 2 4 64.01 / 64.19 1.01 / 0.50 1.4534 5 2 0 65.02 / 65.20 1.84 / 0.92 1.4332 1 2 4 65.53 / 65.71 5.17 / 2.58 1.4233 3 3 3 65.65 / 65.84 11.12 / 5.56 1.4209 2 6 1 66.00 / 66.19 1.19 / 0.60 1.4142 5 2 1 66.38 / 66.56 3.31 / 1.66 1.4072 2 1 4 66.48 / 66.67 1.83 / 0.91 1.4053 0 6 2 67.27 / 67.45 1.82 / 0.91 1.3907 0 5 3 67.84 / 68.03 4.25 / 2.12 1.3803 4 1 3 68.52 / 68.72 3.65 / 1.82 1.3682 1 5 3 68.84 / 69.04 3.10 / 1.55 1.3626 3 5 2 69.12 / 69.32 8.01 / 4.01 1.3578 1 3 4 70.08 / 70.28 7.20 / 3.60 1.3416 5 3 1 71.20 / 71.40 2.30 / 1.15 1.3232 0 7 1 71.22 / 71.43 1.70 / 0.85 1.3229 3 4 3 71.76 / 71.97 2.37 / 1.18 1.3143 4 5 1 72.61 / 72.82 1.83 / 0.91 1.3010 3 1 4 73.74 / 73.96 1.74 / 0.87 1.2838 5 4 0 74.19 / 74.41 1.55 / 0.78 1.2770 2 7 0 74.69 / 74.91 2.60 / 1.30 1.2698 1 4 4 74.97 / 75.19 1.40 / 0.70 1.2658 3 2 4 75.62 / 75.84 1.26 / 0.63 1.2565 5 4 1 75.75 / 75.97 5.15 / 2.57 1.2546 5 3 2 76.38 / 76.61 4.60 / 2.30 1.2458 6 0 1 78.28 / 78.51 1.92 / 0.96 1.2204 3 5 3 78.49 / 78.73 1.60 / 0.80 1.2175 4 6 0 78.82 / 79.05 1.02 / 0.51 1.2133 5 1 3 78.85 / 79.08 1.97 / 0.98 1.2130 3 3 4 79.47 / 79.71 2.04 / 1.02 1.2049 6 2 1 80.24 / 80.48 2.59 / 1.29 1.1954 4 0 4 80.80 / 81.04 5.42 / 2.71 1.1885 2 6 3 81.15 / 81.40 1.69 / 0.84 1.1842 5 4 2 81.59 / 81.84 2.80 / 1.40 1.1789 2 7 2 82.53 / 82.78 3.24 / 1.62 1.1680 2 0 5 82.55 / 82.80 2.22 / 1.11 1.1677 5 5 1 82.67 / 82.92 2.30 / 1.15 1.1663 6 1 2 83.29 / 83.54 4.57 / 2.29 1.1592 4 2 4 84.93 / 85.19 3.94 / 1.97 1.1409 5 3 3 85.17 / 85.43 1.34 / 0.67 1.1383 2 5 4 85.56 / 85.83 2.22 / 1.11 1.1341 2 2 5 85.80 / 86.06 6.45 / 3.23 1.1316 4 6 2 85.84 / 86.11 2.74 / 1.37 1.1311 1 3 5 85.99 / 86.25 1.28 / 0.64 1.1296 0 7 3 86.52 / 86.79 1.31 / 0.65 1.1240 4 5 3 87.53 / 87.81 3.64 / 1.82 1.1136 2 8 1 88.29 / 88.57 2.99 / 1.50 1.1060 0 8 2 88.82 / 89.10 2.51 / 1.26 1.1008 0 6 4 89.46 / 89.74 1.07 / 0.54 1.0945 1 8 2 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.