Dravite 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: Dravite 43167 Locality: Moctezuma, Sonora, Mexico _database_code_amcsd 0018789 CELL PARAMETERS: 15.9600 15.9600 7.2380 90.000 90.000 120.000 SPACE GROUP: R3m X-RAY WAVELENGTH: 1.541838 Cell Volume: 1596.669 Density (g/cm3): 2.959 MAX. ABS. INTENSITY / VOLUME**2: 6.309219276 RIR: 0.694 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 11.09 21.46 7.9800 1 1 0 6 13.81 8.90 6.4120 1 0 1 3 17.74 29.56 4.9984 0 2 1 3 19.26 16.74 4.6073 3 0 0 3 20.97 60.07 4.2360 2 1 1 6 22.28 89.33 3.9900 2 2 0 6 25.44 51.19 3.5010 0 1 2 3 26.31 25.13 3.3877 1 3 1 6 28.63 6.39 3.1183 4 0 1 3 29.62 16.56 3.0162 4 1 0 6 30.04 76.90 2.9749 1 2 2 6 30.78 6.63 2.9044 3 2 1 6 34.07 10.28 2.6316 3 1 2 6 34.74 100.00 2.5824 0 5 1 3 36.57 4.03 2.4570 2 4 1 6 37.27 9.35 2.4127 0 0 3 1 37.72 14.87 2.3850 2 3 2 6 38.33 23.81 2.3482 5 1 1 6 39.10 2.57 2.3036 6 0 0 3 41.09 10.25 2.1968 5 0 2 3 41.66 12.61 2.1680 4 3 1 6 42.29 7.70 2.1373 0 3 3 3 42.29 6.82 2.1373 3 0 3 3 42.69 9.87 2.1180 4 2 2 6 43.85 14.38 2.0646 2 2 3 6 44.24 38.64 2.0471 1 5 2 6 44.78 5.18 2.0237 1 6 1 6 45.46 3.34 1.9950 4 4 0 6 47.23 38.61 1.9244 3 4 2 6 47.74 1.33 1.9049 3 5 1 6 47.74 1.65 1.9049 7 0 1 3 48.31 3.29 1.8841 1 4 3 6 48.31 1.24 1.8841 4 1 3 6 49.17 7.35 1.8529 6 2 1 6 49.81 1.19 1.8307 7 1 0 6 50.08 1.87 1.8214 6 1 2 6 50.89 4.46 1.7942 1 0 4 3 51.11 3.18 1.7871 3 3 3 6 52.26 1.74 1.7505 0 2 4 3 52.82 1.11 1.7333 0 7 2 3 52.82 1.29 1.7333 5 3 2 6 53.29 2.19 1.7191 5 4 1 6 54.15 2.61 1.6938 2 6 2 6 55.12 16.46 1.6661 0 6 3 3 55.12 4.59 1.6661 6 0 3 3 55.91 18.58 1.6444 2 7 1 6 57.49 3.04 1.6030 4 0 4 3 57.77 16.93 1.5960 5 5 0 6 58.01 3.95 1.5898 4 5 2 6 58.46 3.55 1.5788 8 1 1 6 58.75 2.61 1.5716 3 2 4 6 59.71 3.98 1.5487 4 6 1 6 60.26 6.80 1.5358 9 0 0 3 60.50 6.90 1.5302 7 2 2 6 60.94 1.15 1.5204 7 3 1 6 61.22 16.02 1.5140 0 5 4 3 61.49 3.94 1.5081 8 2 0 6 62.43 4.11 1.4875 2 4 4 6 62.93 1.81 1.4769 1 8 2 6 63.63 16.37 1.4623 5 1 4 6 63.82 4.79 1.4584 1 7 3 6 64.13 5.15 1.4522 6 4 2 6 64.75 3.45 1.4397 0 1 5 3 65.08 4.17 1.4333 7 4 0 6 65.72 2.18 1.4207 1 9 1 6 65.72 5.86 1.4207 6 5 1 6 65.93 1.02 1.4169 2 0 5 3 66.00 13.55 1.4155 4 3 4 6 66.18 1.78 1.4120 3 6 3 6 66.18 5.47 1.4120 6 3 3 6 68.05 1.33 1.3777 3 8 1 6 69.20 10.14 1.3576 10 0 1 3 69.94 3.17 1.3451 5 6 2 6 70.53 4.16 1.3352 0 4 5 3 70.60 2.96 1.3340 3 5 4 6 70.78 3.76 1.3311 5 5 3 6 70.85 3.37 1.3300 6 6 0 6 71.67 2.18 1.3169 2 3 5 6 71.73 1.84 1.3158 6 2 4 6 71.98 12.54 1.3119 10 1 0 6 72.20 2.51 1.3085 8 3 2 6 72.59 1.50 1.3023 5 7 1 6 73.32 1.35 1.2912 0 10 2 3 73.71 2.29 1.2853 8 4 1 6 73.90 11.32 1.2824 5 0 5 3 74.15 2.74 1.2788 2 8 3 6 74.21 5.54 1.2778 9 3 0 6 75.08 5.03 1.2652 5 4 4 6 76.12 1.06 1.2505 1 5 5 6 76.64 1.22 1.2433 7 5 2 6 77.03 4.56 1.2380 0 11 1 3 77.74 2.25 1.2285 4 8 2 6 78.12 1.36 1.2234 2 10 1 6 78.31 2.74 1.2209 3 4 5 6 79.44 1.93 1.2063 0 0 6 1 81.38 2.74 1.1824 11 1 1 6 82.69 1.44 1.1670 3 0 6 3 83.96 5.48 1.1525 10 1 3 6 85.94 1.59 1.1310 6 5 4 6 86.11 2.69 1.1292 9 3 3 6 89.09 1.44 1.0990 7 2 5 6 89.13 1.51 1.0986 3 3 6 6 89.15 2.28 1.0984 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.