Pyromorphite Mills S J, Ferraris G, Kampf A R, Favreau G American Mineralogist 97 (2012) 415-418 Twinning in pyromorphite: The first documented occurrence of twinning by merohedry in the apatite supergroup Locality: Puech de Compolibat, Combret, Aveyron _database_code_amcsd 0020825 CELL PARAMETERS: 10.0017 10.0017 7.3413 90.000 90.000 120.000 SPACE GROUP: P6_3/m X-RAY WAVELENGTH: 1.541838 Cell Volume: 635.991 Density (g/cm3): 7.082 MAX. ABS. INTENSITY / VOLUME**2: 157.6759297 RIR: 7.250 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 17.74 9.81 5.0009 1 1 0 6 20.51 29.14 4.3309 2 0 0 6 21.50 46.69 4.1330 1 1 1 12 23.85 2.11 3.7302 2 0 1 12 24.25 6.73 3.6707 0 0 2 2 26.37 30.66 3.3797 1 0 2 12 27.24 16.13 3.2738 1 2 0 6 27.24 19.81 3.2738 2 1 0 6 29.88 41.99 2.9900 1 2 1 12 29.88 50.68 2.9900 2 1 1 12 30.20 100.00 2.9591 1 1 2 12 30.97 53.59 2.8872 3 0 0 6 35.92 2.61 2.5004 2 2 0 6 36.79 1.26 2.4432 1 2 2 12 39.72 5.46 2.2693 3 0 2 12 41.06 14.63 2.1980 1 1 3 12 41.71 5.81 2.1654 4 0 0 6 43.81 34.59 2.0665 2 2 2 12 45.10 11.52 2.0101 3 1 2 12 45.10 7.43 2.0101 1 3 2 12 45.65 6.63 1.9871 2 3 0 6 45.65 2.34 1.9871 3 2 0 6 46.32 14.04 1.9601 1 2 3 12 46.32 11.04 1.9601 2 1 3 12 47.40 13.07 1.9181 2 3 1 12 47.40 8.79 1.9181 3 2 1 12 48.14 8.63 1.8901 1 4 0 6 48.14 13.68 1.8901 4 1 0 6 48.83 28.45 1.8651 4 0 2 12 49.67 11.55 1.8353 0 0 4 2 53.16 1.64 1.7230 1 1 4 12 54.29 3.22 1.6898 2 0 4 12 54.61 2.58 1.6804 1 4 2 12 54.61 1.36 1.6804 4 1 2 12 56.19 3.06 1.6369 2 4 0 6 56.19 1.91 1.6369 4 2 0 6 56.62 4.94 1.6256 3 3 1 12 57.57 5.09 1.6009 1 2 4 12 57.57 3.29 1.6009 2 1 4 12 58.96 4.51 1.5666 5 0 2 12 59.41 1.32 1.5557 1 5 0 6 59.41 2.18 1.5557 5 1 0 6 59.70 11.05 1.5489 3 0 4 12 59.97 3.07 1.5426 2 3 3 12 59.97 4.80 1.5426 3 2 3 12 60.87 3.64 1.5219 1 5 1 12 60.87 5.31 1.5219 5 1 1 12 61.05 8.79 1.5178 3 3 2 12 66.35 1.69 1.4088 1 1 5 12 66.82 2.66 1.4001 4 0 4 12 68.05 2.11 1.3777 3 3 3 12 68.90 1.46 1.3629 2 5 1 12 68.90 2.82 1.3629 5 2 1 12 69.75 2.30 1.3482 2 3 4 12 70.04 5.65 1.3435 6 0 2 12 70.26 2.05 1.3397 1 2 5 12 70.26 3.54 1.3397 2 1 5 12 71.00 1.14 1.3276 4 3 2 12 71.00 3.56 1.3276 3 4 2 12 71.41 1.14 1.3209 1 6 0 6 71.67 5.83 1.3167 4 1 4 12 71.67 4.63 1.3167 1 4 4 12 71.92 2.19 1.3129 5 1 3 12 71.92 2.25 1.3129 1 5 3 12 72.74 1.98 1.3000 1 6 1 12 72.74 1.22 1.3000 6 1 1 12 72.91 5.03 1.2975 2 5 2 12 72.91 4.37 1.2975 5 2 2 12 76.14 1.74 1.2502 4 4 0 6 78.26 1.78 1.2216 2 4 4 12 78.26 1.83 1.2216 4 2 4 12 79.42 1.94 1.2066 5 2 3 12 80.88 4.14 1.1885 1 1 6 12 81.03 1.59 1.1867 5 1 4 12 81.03 1.10 1.1867 1 5 4 12 81.51 2.21 1.1809 2 3 5 12 82.21 1.38 1.1726 7 0 2 12 88.80 1.01 1.1018 3 3 5 12 89.09 2.73 1.0990 2 2 6 12 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.