Fluorapatite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern of R060421 Hughes J M, Cameron M, Crowley K D American Mineralogist 74 (1989) 870-876 Structural variations in natural F, OH, and Cl apatites Locality: Durango Mexico CELL PARAMETERS: 9.3681 9.3681 6.8931 90.000 90.000 120.000 SPACE GROUP: P6_3/m ATOM X Y Z OCCUPANCY ISO(B) Ca 0.66667 0.33333 0.00100 1.000 0.901 Ca -0.00712 0.24227 0.25000 1.000 0.762 P 0.36895 0.39850 0.25000 1.000 0.570 O 0.48490 0.32730 0.25000 1.000 0.986 O 0.46670 0.58750 0.25000 1.000 1.189 O 0.25750 0.34210 0.07050 1.000 1.308 F 0.00000 0.00000 0.25000 1.000 0.648 X-RAY WAVELENGTH: 1.541838 BOUNDS ON TWO THETA: 5.0 90.0 LIMITS IMPOSED ON THE INDICES ARE: +/- 7 +/- 7 +/- 6 MAX. ABS. INTENSITY / VOLUME**2: 14.96138608 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 10.91 9.87 8.1130 1 0 0 16.88 3.71 5.2531 1 0 1 18.95 1.49 4.6841 1 1 0 21.91 5.35 4.0565 2 0 0 22.96 6.55 3.8742 1 1 1 25.48 2.03 3.4961 2 0 1 25.85 37.88 3.4465 0 0 2 28.13 12.12 3.1722 1 0 2 29.12 14.02 3.0664 1 2 0 31.94 69.56 2.8017 1 2 1 31.94 30.44 2.8017 2 1 1 32.25 40.49 2.7760 1 1 2 33.13 57.59 2.7043 3 0 0 34.14 25.82 2.6265 2 0 2 35.66 3.81 2.5175 3 0 1 39.33 4.79 2.2909 1 2 2 40.07 4.46 2.2501 1 3 0 40.07 16.59 2.2501 3 1 0 40.69 2.85 2.2175 2 2 1 42.25 1.93 2.1391 1 3 1 42.25 3.88 2.1391 3 1 1 43.89 4.45 2.0629 1 1 3 44.68 1.25 2.0283 4 0 0 45.36 3.63 1.9993 2 0 3 46.90 26.88 1.9371 2 2 2 48.30 5.66 1.8841 1 3 2 48.30 7.88 1.8841 3 1 2 48.94 3.42 1.8613 3 2 0 49.58 10.12 1.8388 2 1 3 49.58 23.84 1.8388 1 2 3 50.81 8.27 1.7969 2 3 1 50.81 7.75 1.7969 3 2 1 51.63 6.15 1.7704 1 4 0 51.63 7.16 1.7704 4 1 0 52.24 1.18 1.7510 3 0 3 52.34 13.10 1.7480 4 0 2 53.15 16.07 1.7233 0 0 4 56.16 7.53 1.6377 2 3 2 57.31 1.94 1.6076 1 3 3 57.31 1.54 1.6076 3 1 3 58.43 1.64 1.5794 5 0 1 60.37 4.43 1.5332 4 2 0 60.83 4.08 1.5228 3 3 1 61.75 2.15 1.5023 2 1 4 61.75 1.05 1.5023 1 2 4 62.01 2.06 1.4966 4 2 1 63.35 10.79 1.4680 5 0 2 63.88 1.14 1.4571 1 5 0 64.07 8.34 1.4533 3 0 4 64.42 5.45 1.4463 2 3 3 65.47 5.98 1.4256 1 5 1 65.65 1.36 1.4222 3 3 2 70.12 1.57 1.3421 5 1 2 72.13 4.13 1.3095 3 4 1 72.80 2.61 1.2991 2 5 0 74.29 1.53 1.2766 2 5 1 74.38 3.34 1.2753 4 2 3 75.63 1.61 1.2574 2 1 5 75.63 3.60 1.2574 1 2 5 76.60 2.39 1.2439 4 3 2 77.09 1.14 1.2372 1 6 0 77.26 2.67 1.2349 1 4 4 77.26 4.45 1.2349 4 1 4 77.58 3.58 1.2306 1 5 3 78.72 5.02 1.2156 5 2 2 81.47 1.05 1.1813 5 0 4 83.88 3.89 1.1535 3 4 3 84.29 1.81 1.1488 0 0 6 84.60 2.03 1.1455 4 2 4 84.60 1.31 1.1455 2 4 4 85.95 1.19 1.1309 2 5 3 87.41 3.33 1.1158 1 1 6 87.71 1.83 1.1127 1 5 4 88.20 1.56 1.1078 3 2 5 89.14 1.03 1.0986 7 0 2 89.14 1.17 1.0986 5 3 2 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.