Fornacite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from single crystal data of R060986 Cocco G, Fanfani L, Zanazzi P F Zeitschrift fur Kristallographie 124 (1967) 385-397 The crystal structure of fornacite Locality: Reneville, Congo CELL PARAMETERS: 8.0880 5.9290 17.5680 90.000 109.990 90.000 SPACE GROUP: P2_1/c ATOM X Y Z OCCUPANCY ISO(B) Pb 0.21940 0.21970 0.37570 1.000 1.920 Pb 0.22250 0.77310 0.05890 1.000 1.670 Cu 0.48590 0.50820 0.24860 1.000 1.330 As 0.48650 0.25950 0.08140 0.925 1.610 P 0.48650 0.25950 0.08140 0.075 1.610 Cr 0.05040 0.25970 0.15890 1.000 1.050 O 0.54090 0.02820 0.13770 1.000 2.500 O 0.47230 0.47790 0.13220 1.000 2.500 O 0.29010 0.20880 0.01490 1.000 2.500 O 0.63770 0.31530 0.04760 1.000 2.500 O 0.99410 0.03160 0.10190 1.000 2.500 O 0.00440 0.47260 0.09440 1.000 2.500 O 0.25010 0.24780 0.21350 1.000 2.500 O 0.92710 0.28890 0.21820 1.000 2.500 OH 0.34400 0.76070 0.21920 1.000 2.500 X-RAY WAVELENGTH: 1.541838 BOUNDS ON TWO THETA: 0.0 90.0 LIMITS IMPOSED ON THE INDICES ARE: +/- 6 +/- 5 +/- 15 MAX. ABS. INTENSITY / VOLUME**2: 101.8619992 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 10.72 13.02 8.2548 0 0 2 11.64 1.24 7.6007 1 0 0 18.37 2.51 4.8290 1 0 2 18.42 35.61 4.8156 0 1 2 18.61 1.14 4.7686 -1 1 1 19.76 3.68 4.4931 -1 1 2 20.68 1.32 4.2947 -1 0 4 21.53 12.90 4.1274 0 0 4 22.04 1.28 4.0335 0 1 3 22.16 13.76 4.0122 -2 0 2 22.21 3.09 4.0022 -1 1 3 23.41 6.94 3.8004 2 0 0 23.76 25.06 3.7443 1 1 2 25.61 1.46 3.4781 -1 1 4 25.88 5.77 3.4431 -2 0 4 26.31 12.63 3.3874 0 1 4 26.83 100.00 3.3229 -2 1 2 27.90 13.70 3.1976 1 0 4 29.03 5.43 3.0757 2 0 2 30.01 30.99 2.9775 -2 1 4 30.15 31.37 2.9645 0 2 0 30.54 37.29 2.9273 -1 0 6 31.80 38.98 2.8144 1 1 4 32.08 10.79 2.7900 0 2 2 32.19 1.92 2.7808 -1 2 1 32.42 3.08 2.7619 1 2 0 32.54 7.17 2.7516 0 0 6 32.80 29.89 2.7302 2 1 2 32.89 5.84 2.7229 -1 2 2 33.03 1.17 2.7123 -2 0 6 33.56 2.18 2.6706 1 2 1 34.16 4.48 2.6248 -1 1 6 34.64 1.16 2.5897 -3 0 4 35.43 6.96 2.5336 3 0 0 35.53 2.13 2.5264 1 2 2 36.43 3.02 2.4665 -2 1 6 36.84 6.10 2.4397 -1 2 4 37.35 7.31 2.4078 0 2 4 38.41 4.47 2.3435 1 0 6 38.51 23.33 2.3374 2 2 0 39.25 1.85 2.2954 -3 0 6 39.87 1.14 2.2612 -1 2 5 40.14 1.64 2.2465 -2 2 4 40.33 2.07 2.2362 2 1 4 40.67 1.02 2.2186 3 0 2 40.91 1.65 2.2059 0 2 5 41.43 2.53 2.1794 1 1 6 41.54 2.19 2.1739 1 2 4 42.08 1.12 2.1474 -2 0 8 43.44 17.71 2.0830 -1 2 6 43.56 8.28 2.0779 3 1 2 44.08 10.76 2.0542 -1 1 8 44.89 1.63 2.0190 -2 1 8 45.16 1.23 2.0079 -4 0 2 45.20 5.07 2.0061 -4 0 4 45.32 6.16 2.0011 -2 2 6 45.49 1.18 1.9938 -3 2 2 46.00 1.11 1.9730 -3 2 1 47.19 1.66 1.9260 3 2 0 47.29 3.24 1.9220 0 3 2 47.37 1.38 1.9190 -1 3 1 47.83 4.83 1.9018 -4 1 2 47.87 4.79 1.9003 -4 1 4 47.87 9.19 1.9002 4 0 0 47.99 8.93 1.8957 -4 0 6 48.14 2.36 1.8903 3 0 4 48.90 15.96 1.8625 -3 1 8 48.97 1.15 1.8600 0 3 3 49.06 2.68 1.8569 -1 3 3 49.58 5.72 1.8384 1 2 6 49.86 2.57 1.8291 1 3 2 50.27 2.99 1.8149 -3 2 6 50.69 1.50 1.8009 3 1 4 51.25 1.76 1.7825 0 3 4 51.44 4.76 1.7763 3 2 2 51.55 10.12 1.7729 -2 3 2 51.91 1.51 1.7614 -1 2 8 52.07 12.46 1.7564 1 1 8 52.55 2.14 1.7415 -1 0 10 53.46 4.25 1.7140 -2 3 4 54.15 1.15 1.6937 0 2 8 54.59 5.91 1.6811 1 3 4 54.95 1.14 1.6710 -1 1 10 55.04 2.51 1.6685 -3 0 10 55.25 3.63 1.6627 2 3 2 55.26 3.29 1.6624 -4 2 2 55.29 6.29 1.6614 -4 2 4 55.59 1.14 1.6533 -4 1 8 55.67 1.16 1.6510 0 0 10 57.23 6.23 1.6097 3 0 6 57.37 3.57 1.6061 -3 1 10 57.62 2.85 1.5998 4 2 0 57.72 3.71 1.5971 -4 2 6 57.85 5.24 1.5938 3 2 4 57.99 1.02 1.5904 0 1 10 58.03 1.57 1.5895 -3 3 3 60.06 1.66 1.5405 -5 1 2 61.41 1.52 1.5098 1 0 10 61.78 6.90 1.5016 -1 2 10 62.68 4.85 1.4822 0 4 0 62.99 1.65 1.4757 3 3 2 63.40 1.71 1.4672 -1 3 8 63.57 1.48 1.4637 -2 0 12 63.59 1.29 1.4631 1 1 10 63.86 1.13 1.4576 -1 4 1 64.58 1.41 1.4430 -1 0 12 66.05 4.91 1.4146 3 2 6 66.37 1.34 1.4085 -4 3 2 66.40 1.13 1.4079 -4 3 4 67.24 4.44 1.3923 -3 3 8 67.28 1.70 1.3916 -3 1 12 68.08 1.13 1.3773 -5 0 10 68.31 3.88 1.3731 5 1 2 69.49 1.50 1.3527 5 2 0 69.51 1.02 1.3522 0 4 5 69.73 1.16 1.3486 3 1 8 69.87 3.96 1.3463 1 3 8 69.96 1.11 1.3448 1 4 4 71.32 3.46 1.3224 -1 4 6 71.87 3.28 1.3136 -6 1 4 73.40 2.16 1.2900 -6 1 2 73.46 1.19 1.2891 -3 2 12 74.11 1.00 1.2794 3 4 0 74.41 1.24 1.2749 -3 3 10 75.09 2.33 1.2650 -6 1 8 75.37 2.04 1.2610 5 1 4 75.74 1.68 1.2558 -5 0 12 76.23 3.23 1.2490 -5 2 10 77.48 1.37 1.2320 2 2 10 78.45 1.47 1.2191 -6 2 6 78.56 1.25 1.2176 -3 1 14 81.34 1.25 1.1830 4 1 8 81.67 1.12 1.1790 -4 1 14 82.28 1.33 1.1718 2 0 12 82.54 1.81 1.1687 4 4 0 82.63 1.77 1.1677 -4 4 6 83.60 2.47 1.1566 0 1 14 83.63 1.42 1.1563 -5 2 12 84.31 1.68 1.1486 5 3 2 85.36 1.51 1.1372 -2 5 2 89.99 1.76 1.0904 3 4 6 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.