Fluor-buergerite Grice J D, Ercit T S Neues Jahrbuch fur Mineralogie, Abhandlungen 165 (1993) 245-266 Ordering of Fe and Mg in the tourmaline crystal structure: The correct formula Sample: Buergerite 43293 Locality: Mapimi, Durango, Mexico _database_code_amcsd 0018787 CELL PARAMETERS: 15.8740 15.8740 7.1960 90.000 90.000 120.000 SPACE GROUP: R3m X-RAY WAVELENGTH: 1.541838 Cell Volume: 1570.343 Density (g/cm3): 3.151 MAX. ABS. INTENSITY / VOLUME**2: 8.788142394 RIR: 0.908 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 13.89 44.03 6.3754 1 0 1 3 17.85 16.44 4.9705 0 2 1 3 19.37 15.51 4.5824 3 0 0 3 21.09 57.08 4.2126 2 1 1 6 22.40 80.16 3.9685 2 2 0 6 25.59 54.06 3.4808 0 1 2 3 26.46 5.12 3.3691 1 3 1 6 27.99 1.91 3.1877 2 0 2 3 29.78 11.93 2.9999 4 1 0 6 30.21 63.98 2.9580 1 2 2 6 30.96 6.01 2.8886 3 2 1 6 34.27 3.38 2.6168 3 1 2 6 34.93 100.00 2.5684 0 5 1 3 36.14 1.62 2.4852 0 4 2 3 36.78 3.56 2.4436 2 4 1 6 37.49 6.20 2.3987 0 0 3 1 37.94 13.77 2.3717 2 3 2 6 38.55 14.15 2.3354 5 1 1 6 39.32 3.63 2.2912 6 0 0 3 41.00 1.08 2.2013 5 2 0 6 41.33 18.36 2.1846 5 0 2 3 41.90 5.77 2.1562 4 3 1 6 42.54 3.99 2.1251 0 3 3 3 42.54 9.30 2.1251 3 0 3 3 42.94 5.90 2.1063 4 2 2 6 44.12 9.84 2.0528 2 2 3 6 44.50 37.68 2.0358 1 5 2 6 45.04 5.88 2.0128 1 6 1 6 45.72 4.65 1.9842 4 4 0 6 47.51 27.06 1.9138 3 4 2 6 48.02 2.17 1.8946 3 5 1 6 48.60 7.84 1.8734 1 4 3 6 49.46 7.79 1.8428 6 2 1 6 50.10 2.57 1.8209 7 1 0 6 50.38 1.12 1.8114 6 1 2 6 51.21 2.12 1.7838 1 0 4 3 51.42 3.55 1.7770 3 3 3 6 52.59 2.62 1.7404 0 2 4 3 53.13 1.28 1.7238 5 3 2 6 54.47 1.75 1.6846 2 6 2 6 55.46 16.23 1.6568 0 6 3 3 55.46 3.04 1.6568 6 0 3 3 56.24 14.31 1.6355 2 7 1 6 57.85 3.95 1.5938 4 0 4 3 58.11 17.35 1.5874 5 5 0 6 58.36 3.74 1.5811 4 5 2 6 59.12 1.87 1.5627 3 2 4 6 59.63 1.64 1.5506 8 0 2 3 60.06 4.16 1.5404 4 6 1 6 60.62 2.80 1.5275 9 0 0 3 60.87 5.96 1.5219 7 2 2 6 61.30 1.13 1.5122 7 3 1 6 61.61 14.23 1.5054 0 5 4 3 61.86 3.52 1.5000 8 2 0 6 62.83 2.95 1.4790 2 4 4 6 64.04 16.67 1.4540 5 1 4 6 64.22 4.04 1.4503 1 7 3 6 64.52 4.80 1.4443 6 4 2 6 65.17 4.17 1.4314 0 1 5 3 65.48 3.63 1.4255 7 4 0 6 66.13 7.23 1.4130 6 5 1 6 66.13 1.40 1.4130 1 9 1 6 66.42 10.57 1.4075 4 3 4 6 66.60 1.23 1.4042 3 6 3 6 66.60 3.43 1.4042 6 3 3 6 68.47 1.36 1.3703 3 8 1 6 69.63 10.65 1.3503 10 0 1 3 70.38 3.50 1.3378 5 6 2 6 71.00 2.22 1.3275 0 4 5 3 71.06 3.75 1.3266 3 5 4 6 71.23 5.38 1.3238 5 5 3 6 71.29 3.80 1.3228 6 6 0 6 72.14 2.10 1.3093 2 3 5 6 72.20 1.57 1.3084 6 2 4 6 72.43 9.24 1.3048 10 1 0 6 72.66 1.99 1.3013 8 3 2 6 73.50 1.25 1.2884 9 0 3 3 73.79 1.59 1.2842 0 10 2 3 74.18 1.54 1.2783 8 4 1 6 74.40 9.59 1.2751 5 0 5 3 74.63 3.09 1.2718 2 8 3 6 74.68 5.00 1.2709 9 3 0 6 75.58 2.22 1.2581 5 4 4 6 77.52 3.82 1.2313 0 11 1 3 78.24 2.02 1.2218 4 8 2 6 78.85 1.90 1.2140 3 4 5 6 80.00 1.74 1.1993 0 0 6 1 80.00 1.06 1.1993 8 1 4 6 81.92 2.46 1.1760 11 1 1 6 84.53 5.54 1.1462 10 1 3 6 86.54 1.08 1.1247 1 9 4 6 86.70 1.79 1.1230 9 3 3 6 87.62 1.30 1.1136 1 4 6 6 89.78 1.18 1.0923 3 3 6 6 89.78 2.25 1.0923 10 0 4 3 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.