Carbonate-fluorapatite Perdikatsis B Materials Science Forum 79 (1991) 809-814 X-ray powder diffraction study of francolite by the Rietveld method Locality: Epirus, Greece Sample: T = 750 C Note: Reported structure does not reproduce reported formula or bondlengths _database_code_amcsd 0014387 CELL PARAMETERS: 9.3593 9.3593 6.8919 90.000 90.000 120.000 SPACE GROUP: P6_3/m X-RAY WAVELENGTH: 1.541838 Cell Volume: 522.825 Density (g/cm3): 1.721 MAX. ABS. INTENSITY / VOLUME**2: 2.934885951 RIR: 0.555 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 10.92 1.47 8.1054 1 0 0 6 16.89 14.87 5.2505 1 0 1 12 18.96 76.20 4.6796 1 1 0 6 21.93 28.99 4.0527 2 0 0 6 22.97 25.51 3.8715 1 1 1 12 25.50 11.66 3.4935 2 0 1 12 25.85 18.65 3.4460 0 0 2 2 28.14 1.96 3.1713 1 0 2 12 29.15 3.50 3.0635 1 2 0 6 29.15 34.81 3.0635 2 1 0 6 31.97 31.28 2.7994 1 2 1 12 31.97 68.72 2.7994 2 1 1 12 32.26 16.60 2.7748 1 1 2 12 33.16 62.37 2.7018 3 0 0 6 34.15 24.90 2.6252 2 0 2 12 35.69 3.87 2.5154 3 0 1 12 39.35 14.59 2.2896 1 2 2 12 39.35 4.30 2.2896 2 1 2 12 40.11 50.74 2.2480 1 3 0 6 40.11 13.50 2.2480 3 1 0 6 40.72 4.98 2.2156 2 2 1 12 40.83 2.43 2.2102 1 0 3 12 42.29 3.82 2.1372 1 3 1 12 42.29 8.02 2.1372 3 1 1 12 42.52 2.61 2.1262 3 0 2 12 43.90 21.51 2.0622 1 1 3 12 44.72 1.14 2.0263 4 0 0 6 45.38 15.87 1.9985 2 0 3 12 46.94 29.38 1.9358 2 2 2 12 48.34 7.50 1.8828 3 1 2 12 48.99 5.90 1.8595 2 3 0 6 49.60 13.16 1.8379 1 2 3 12 49.60 34.77 1.8379 2 1 3 12 50.86 12.58 1.7953 2 3 1 12 50.86 8.22 1.7953 3 2 1 12 51.68 2.86 1.7687 1 4 0 6 51.68 2.80 1.7687 4 1 0 6 52.27 1.58 1.7502 3 0 3 12 52.38 11.43 1.7467 4 0 2 12 53.16 13.90 1.7230 0 0 4 2 56.21 6.36 1.6364 3 2 2 12 57.35 1.40 1.6067 1 3 3 12 57.35 9.33 1.6067 3 1 3 12 58.49 3.68 1.5780 5 0 1 12 60.44 6.20 1.5318 2 4 0 6 60.89 6.72 1.5214 3 3 1 12 61.77 1.11 1.5018 2 1 4 12 61.77 2.75 1.5018 1 2 4 12 62.07 1.15 1.4953 2 4 1 12 63.41 11.67 1.4669 5 0 2 12 64.10 4.84 1.4527 3 0 4 12 64.47 7.88 1.4454 3 2 3 12 65.54 1.26 1.4243 1 5 1 12 65.54 6.18 1.4243 5 1 1 12 66.74 1.86 1.4015 1 4 3 12 66.74 1.47 1.4015 4 1 3 12 66.84 3.91 1.3997 4 2 2 12 70.18 3.08 1.3410 5 1 2 12 71.19 1.87 1.3245 5 0 3 12 71.33 1.37 1.3222 1 1 5 12 72.21 3.87 1.3083 4 3 1 12 72.88 1.41 1.2979 2 5 0 6 72.88 3.02 1.2979 5 2 0 6 74.37 1.64 1.2755 5 2 1 12 74.44 5.76 1.2745 2 4 3 12 75.66 1.68 1.2570 1 2 5 12 75.66 2.99 1.2570 2 1 5 12 76.67 1.86 1.2428 3 4 2 12 77.17 1.75 1.2361 6 1 0 6 77.31 3.25 1.2342 1 4 4 12 77.31 1.39 1.2342 4 1 4 12 77.65 4.04 1.2297 5 1 3 12 78.80 7.42 1.2146 2 5 2 12 78.80 1.27 1.2146 5 2 2 12 81.53 1.10 1.1807 5 0 4 12 82.00 1.36 1.1751 3 1 5 12 83.00 1.87 1.1635 1 6 2 12 83.95 5.25 1.1527 4 3 3 12 84.31 2.94 1.1487 0 0 6 2 84.66 1.47 1.1448 4 2 4 12 84.66 2.04 1.1448 2 4 4 12 86.03 1.53 1.1300 5 2 3 12 87.43 3.88 1.1155 1 1 6 12 87.78 2.02 1.1120 5 1 4 12 88.25 2.66 1.1073 2 3 5 12 89.23 1.06 1.0976 5 3 2 12 89.23 1.10 1.0976 7 0 2 12 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.