Fluorapatite Diffraction data computed using the structure from the paper listed below, along with the cell parameters refined from the powder pattern of R050122 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: 9.3930 9.3930 6.8827 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 0.904 Ca -0.00712 0.24227 0.25000 1.000 0.765 P 0.36895 0.39850 0.25000 1.000 0.572 O 0.48490 0.32730 0.25000 1.000 0.989 O 0.46670 0.58750 0.25000 1.000 1.191 O 0.25750 0.34210 0.07050 1.000 1.312 F 0.00000 0.00000 0.25000 1.000 0.651 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: 14.93497875 The INTENSITY cut off value is 1.00 2-THETA INTENSITY D-SPACING H K L 10.88 9.87 8.1346 1 0 0 16.87 3.69 5.2543 1 0 1 18.90 1.50 4.6965 1 1 0 21.85 5.36 4.0673 2 0 0 22.92 6.54 3.8794 1 1 1 25.44 2.02 3.5016 2 0 1 25.89 37.49 3.4413 0 0 2 28.16 12.02 3.1694 1 0 2 29.04 14.05 3.0746 1 2 0 31.88 69.57 2.8072 1 2 1 31.88 30.43 2.8072 2 1 1 32.25 40.24 2.7759 1 1 2 33.04 57.72 2.7115 3 0 0 34.13 25.68 2.6271 2 0 2 35.59 3.82 2.5228 3 0 1 39.30 4.77 2.2928 1 2 2 39.96 4.47 2.2561 1 3 0 39.96 16.66 2.2561 3 1 0 40.59 2.86 2.2225 2 2 1 42.15 1.94 2.1439 1 3 1 42.15 3.88 2.1439 3 1 1 43.92 4.41 2.0614 1 1 3 44.55 1.26 2.0336 4 0 0 45.39 3.60 1.9983 2 0 3 46.84 26.85 1.9397 2 2 2 48.23 5.66 1.8868 1 3 2 48.23 7.88 1.8868 3 1 2 48.80 3.43 1.8662 3 2 0 49.58 10.05 1.8387 2 1 3 49.58 23.69 1.8387 1 2 3 50.68 8.30 1.8012 2 3 1 50.68 7.77 1.8012 3 2 1 51.48 6.18 1.7751 1 4 0 51.48 7.19 1.7751 4 1 0 52.23 1.17 1.7514 3 0 3 52.25 13.10 1.7508 4 0 2 53.24 15.88 1.7207 0 0 4 56.06 7.54 1.6405 2 3 2 57.27 1.93 1.6086 1 3 3 57.27 1.54 1.6086 3 1 3 58.28 1.65 1.5833 5 0 1 60.20 4.45 1.5373 4 2 0 60.67 4.10 1.5265 3 3 1 61.78 2.13 1.5015 2 1 4 61.78 1.05 1.5015 1 2 4 61.84 2.07 1.5003 4 2 1 63.22 10.80 1.4708 5 0 2 63.70 1.15 1.4610 1 5 0 64.10 8.27 1.4528 3 0 4 64.35 5.44 1.4477 2 3 3 65.29 6.00 1.4292 1 5 1 65.50 1.37 1.4250 3 3 2 69.95 1.58 1.3448 5 1 2 71.92 4.14 1.3128 3 4 1 72.58 2.63 1.3026 2 5 0 74.08 1.54 1.2799 2 5 1 74.26 3.34 1.2771 4 2 3 75.70 1.60 1.2564 2 1 5 75.70 3.56 1.2564 1 2 5 76.41 2.40 1.2465 4 3 2 76.84 1.14 1.2405 1 6 0 77.21 2.66 1.2355 1 4 4 77.21 4.43 1.2355 4 1 4 77.45 3.58 1.2323 1 5 3 78.52 5.03 1.2182 5 2 2 81.40 1.04 1.1822 5 0 4 83.71 3.89 1.1554 3 4 3 84.45 1.79 1.1471 0 0 6 84.52 1.30 1.1464 2 4 4 84.52 2.02 1.1464 4 2 4 85.78 1.19 1.1327 2 5 3 87.55 3.29 1.1144 1 1 6 87.61 1.82 1.1137 1 5 4 88.20 1.55 1.1078 3 2 5 88.89 1.17 1.1010 5 3 2 88.89 1.03 1.1010 7 0 2 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.