Pb2OFCl Aurivillius B Chemica Scripta 11 (1977) 208-211 A case of mimetic twinning. The crystal structures of Pb2OFX (X=Cl, Br, and I) Locality: synthetic Sample: Pb2OFCl(H), part A of the twin, isostructural with blixite _database_code_amcsd 0012188 CELL PARAMETERS: 5.7293 5.7293 12.5602 90.000 90.000 90.000 SPACE GROUP: Acmm X-RAY WAVELENGTH: 1.541838 Cell Volume: 412.287 Density (g/cm3): 7.810 MAX. ABS. INTENSITY / VOLUME**2: 379.6317008 RIR: 15.827 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 14.10 11.27 6.2801 0 0 2 2 15.47 4.11 5.7293 1 0 0 2 23.07 52.15 3.8556 1 1 1 8 28.42 13.90 3.1400 0 0 4 2 30.71 100.00 2.9114 1 1 3 8 31.22 23.74 2.8647 0 2 0 2 31.22 20.90 2.8647 2 0 0 2 35.02 1.25 2.5622 1 2 0 4 35.77 2.05 2.5105 2 1 1 8 41.31 4.87 2.1854 2 1 3 8 42.34 1.53 2.1349 1 1 5 8 42.73 14.48 2.1163 0 2 4 4 42.73 12.98 2.1163 2 0 4 4 43.22 4.97 2.0934 0 0 6 2 44.74 20.69 2.0256 2 2 0 4 47.14 1.82 1.9278 2 2 2 8 47.62 1.99 1.9098 3 0 0 2 50.92 6.20 1.7932 1 3 1 8 50.92 4.82 1.7932 3 1 1 8 53.86 8.48 1.7022 2 2 4 8 54.27 7.06 1.6902 0 2 6 4 54.27 6.35 1.6902 2 0 6 4 55.24 17.33 1.6628 1 3 3 8 55.24 13.63 1.6628 3 1 3 8 56.06 13.58 1.6406 1 1 7 8 56.39 1.19 1.6317 3 0 4 4 58.05 2.01 1.5890 3 2 0 4 58.82 1.38 1.5700 0 0 8 2 62.52 1.30 1.4856 2 3 3 8 63.27 1.07 1.4698 2 1 7 8 63.96 5.16 1.4557 2 2 6 8 65.13 3.32 1.4323 0 4 0 2 65.13 2.08 1.4323 4 0 0 2 65.88 1.52 1.4178 3 2 4 8 67.86 1.03 1.3811 4 1 1 8 68.10 1.07 1.3768 0 2 8 4 70.08 1.72 1.3427 3 3 1 8 71.50 1.72 1.3195 1 1 9 8 71.54 2.96 1.3188 4 1 3 8 72.54 1.91 1.3032 0 4 4 4 72.54 1.09 1.3032 4 0 4 4 73.72 5.26 1.2852 3 3 3 8 73.99 3.10 1.2811 2 4 0 4 73.99 2.07 1.2811 4 2 0 4 74.41 5.40 1.2749 1 3 7 8 74.41 4.21 1.2749 3 1 7 8 75.73 1.44 1.2560 0 0 10 2 76.81 2.00 1.2409 2 2 8 8 81.07 3.23 1.1862 2 4 4 8 81.07 2.24 1.1862 4 2 4 8 81.41 1.40 1.1821 0 4 6 4 84.16 1.67 1.1503 0 2 10 4 84.16 1.47 1.1503 2 0 10 4 87.08 1.17 1.1191 1 5 1 8 88.46 1.61 1.1052 4 3 3 8 89.09 2.79 1.0990 1 1 11 8 89.13 1.35 1.0986 4 1 7 8 89.74 1.78 1.0927 4 2 6 8 89.74 2.53 1.0927 2 4 6 8 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.