Lukechangite-(Ce) Grice J D, Chao G Y American Mineralogist 82 (1997) 1255-1260 Lukechangite-(Ce), a new rare-earth-fluorocarbonate mineral from Mont Saint-Hilaire, Quebec Note: U(1,2) for Na1, O1, O2 and F changed to match symmetry constraints. Note: U(2,3) for O2 changed to match symmetry constraints. _database_code_amcsd 0001952 CELL PARAMETERS: 5.0612 5.0612 22.8200 90.000 90.000 120.000 SPACE GROUP: P6_3/mmc X-RAY WAVELENGTH: 1.541838 Cell Volume: 506.236 Density (g/cm3): 3.990 MAX. ABS. INTENSITY / VOLUME**2: 36.07912596 RIR: 2.945 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 7.75 17.96 11.4100 0 0 2 2 15.53 51.38 5.7050 0 0 4 2 20.26 21.42 4.3831 1 0 0 6 20.63 100.00 4.3044 1 0 1 12 21.72 7.88 4.0916 1 0 2 12 23.39 23.85 3.8033 0 0 6 2 23.42 24.37 3.7978 1 0 3 12 25.63 33.38 3.4757 1 0 4 12 28.23 67.77 3.1613 1 0 5 12 31.13 45.85 2.8726 1 0 6 12 34.28 5.96 2.6158 1 0 7 12 35.47 66.46 2.5306 1 1 0 6 36.36 4.46 2.4706 1 1 2 12 37.62 10.59 2.3908 1 0 8 12 38.93 20.00 2.3132 1 1 4 12 39.49 17.26 2.2820 0 0 10 2 41.13 33.22 2.1948 1 0 9 12 41.19 16.40 2.1916 2 0 0 6 41.39 34.22 2.1815 2 0 1 12 42.93 19.02 2.1069 1 1 6 12 44.27 9.17 2.0458 2 0 4 12 44.78 3.76 2.0241 1 0 10 12 45.94 57.37 1.9756 2 0 5 12 47.91 11.19 1.8989 2 0 6 12 48.06 18.47 1.8930 1 1 8 12 48.55 14.73 1.8751 1 0 11 12 54.12 25.02 1.6947 1 1 10 12 55.41 10.52 1.6581 2 0 9 12 55.46 3.39 1.6567 2 1 0 12 55.62 18.87 1.6523 2 1 1 24 56.45 1.41 1.6300 0 0 14 2 56.47 13.03 1.6296 1 0 13 12 56.88 4.44 1.6187 2 1 3 24 57.97 5.48 1.5909 2 1 4 24 58.38 3.46 1.5807 2 0 10 12 59.35 18.37 1.5572 2 1 5 24 60.61 2.30 1.5278 1 0 14 12 61.00 4.45 1.5188 2 1 6 24 61.55 5.06 1.5066 2 0 11 12 63.69 9.39 1.4610 3 0 0 6 64.88 6.74 1.4372 1 0 15 12 65.11 2.73 1.4326 2 1 8 24 66.01 4.50 1.4154 3 0 4 12 67.54 11.91 1.3869 2 1 9 24 68.47 7.00 1.3703 1 1 14 12 68.48 1.08 1.3701 2 0 13 12 68.84 4.22 1.3639 3 0 6 12 69.28 1.83 1.3563 1 0 16 12 70.20 3.25 1.3406 2 1 10 24 72.23 1.29 1.3079 2 0 14 12 72.72 4.53 1.3004 3 0 8 12 73.10 8.39 1.2945 2 1 11 24 75.07 10.81 1.2653 2 2 0 6 76.18 2.72 1.2497 2 0 15 12 76.70 1.40 1.2425 1 1 16 12 77.23 3.79 1.2353 2 2 4 12 77.59 7.61 1.2305 3 0 10 12 78.55 1.25 1.2179 1 0 18 12 78.71 1.52 1.2157 3 1 0 12 78.85 5.31 1.2139 3 1 1 24 79.56 7.19 1.2048 2 1 13 24 79.90 3.83 1.2006 2 2 6 12 79.91 1.00 1.2004 3 1 3 24 80.84 2.39 1.1890 3 1 4 24 82.03 8.13 1.1747 3 1 5 24 83.13 3.46 1.1619 2 1 14 24 83.45 6.06 1.1584 1 0 19 12 83.48 3.17 1.1579 3 1 6 24 85.71 4.66 1.1335 1 1 18 12 86.94 5.18 1.1205 2 1 15 24 88.32 6.53 1.1066 2 2 10 12 89.38 6.20 1.0962 3 1 9 24 89.55 2.83 1.0945 4 0 1 12 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.