Dravite Vereshchagin O S, Rozhdestvenskaya I V, Frank-Kamenetskaya O V, Zolotarev A A European Journal of Mineralogy 26 (2014) 309-321 Ion substitutions and structural adjustment in Cr-bearing tourmalines Note: Sample 4 Locality: Umba Valley, Tanzania _database_code_amcsd 0020157 CELL PARAMETERS: 15.9210 15.9210 7.1940 90.000 90.000 120.000 SPACE GROUP: R3m X-RAY WAVELENGTH: 1.541838 Cell Volume: 1579.217 Density (g/cm3): 3.015 MAX. ABS. INTENSITY / VOLUME**2: 6.737009531 RIR: 0.728 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 13.88 21.06 6.3780 1 0 1 3 17.82 21.19 4.9775 0 2 1 3 19.31 18.11 4.5960 3 0 0 3 21.05 63.62 4.2204 2 1 1 6 22.34 83.49 3.9802 2 2 0 6 25.59 48.61 3.4805 0 1 2 3 26.39 14.73 3.3767 1 3 1 6 28.72 3.06 3.1086 4 0 1 3 29.69 16.64 3.0088 4 1 0 6 30.19 78.20 2.9603 1 2 2 6 30.88 7.45 2.8956 3 2 1 6 34.22 8.35 2.6201 3 1 2 6 34.84 100.00 2.5749 0 5 1 3 36.68 3.61 2.4499 2 4 1 6 37.51 9.84 2.3980 0 0 3 1 37.88 13.31 2.3754 2 3 2 6 38.44 20.78 2.3415 5 1 1 6 39.20 3.23 2.2980 6 0 0 3 41.25 11.24 2.1885 5 0 2 3 41.78 12.90 2.1620 4 3 1 6 42.52 5.73 2.1260 0 3 3 3 42.52 6.72 2.1260 3 0 3 3 42.86 7.90 2.1102 4 2 2 6 44.09 14.35 2.0540 2 2 3 6 44.41 40.71 2.0397 1 5 2 6 44.91 8.02 2.0182 1 6 1 6 45.58 3.71 1.9901 4 4 0 6 47.41 33.72 1.9177 3 4 2 6 47.88 1.03 1.8998 7 0 1 3 48.55 4.31 1.8753 1 4 3 6 49.31 8.07 1.8479 6 2 1 6 49.94 1.07 1.8263 7 1 0 6 50.26 1.65 1.8153 6 1 2 6 51.22 2.98 1.7834 1 0 4 3 51.36 4.61 1.7791 3 3 3 6 52.59 2.01 1.7403 0 2 4 3 53.00 1.08 1.7276 0 7 2 3 53.44 1.32 1.7145 5 4 1 6 54.34 3.76 1.6883 2 6 2 6 55.37 15.72 1.6592 0 6 3 3 55.37 4.68 1.6592 6 0 3 3 56.07 15.91 1.6401 2 7 1 6 57.83 3.06 1.5945 4 0 4 3 57.92 17.56 1.5921 5 5 0 6 58.21 4.15 1.5848 4 5 2 6 58.63 3.04 1.5746 8 1 1 6 59.09 2.22 1.5635 3 2 4 6 59.88 4.19 1.5447 4 6 1 6 60.43 5.19 1.5320 9 0 0 3 60.71 6.37 1.5255 7 2 2 6 61.11 1.04 1.5164 7 3 1 6 61.56 16.61 1.5064 0 5 4 3 61.65 3.64 1.5044 8 2 0 6 62.78 4.29 1.4802 2 4 4 6 63.15 1.64 1.4724 1 8 2 6 63.98 16.78 1.4552 5 1 4 6 64.09 4.27 1.4529 1 7 3 6 64.09 1.31 1.4529 7 1 3 6 64.35 4.83 1.4478 6 4 2 6 65.19 3.86 1.4310 0 1 5 3 65.26 5.51 1.4297 7 4 0 6 65.92 1.89 1.4171 1 9 1 6 65.92 6.36 1.4171 6 5 1 6 66.35 12.23 1.4089 4 3 4 6 66.46 1.55 1.4068 3 6 3 6 66.46 4.94 1.4068 6 3 3 6 68.25 1.50 1.3742 3 8 1 6 69.40 10.43 1.3542 10 0 1 3 70.17 2.82 1.3411 5 6 2 6 70.96 3.23 1.3281 3 5 4 6 70.99 3.64 1.3278 0 4 5 3 71.05 4.50 1.3267 6 6 0 6 71.07 4.24 1.3264 5 5 3 6 72.10 1.61 1.3100 6 2 4 6 72.12 1.77 1.3097 2 3 5 6 72.18 12.34 1.3087 10 1 0 6 72.44 2.97 1.3046 8 3 2 6 72.81 1.59 1.2989 5 7 1 6 73.57 1.53 1.2875 0 10 2 3 73.93 1.72 1.2820 8 4 1 6 74.36 11.66 1.2756 5 0 5 3 74.43 4.51 1.2747 9 3 0 6 74.45 2.78 1.2744 2 8 3 6 75.46 3.53 1.2599 5 4 4 6 76.59 1.12 1.2441 1 5 5 6 76.90 1.12 1.2397 7 5 2 6 77.26 4.35 1.2348 0 11 1 3 78.00 2.27 1.2250 4 8 2 6 78.36 1.26 1.2203 2 10 1 6 78.79 2.43 1.2147 3 4 5 6 80.03 1.78 1.1990 0 0 6 1 80.97 1.38 1.1874 6 1 5 6 81.64 3.35 1.1794 11 1 1 6 83.29 1.31 1.1602 3 0 6 3 84.30 5.26 1.1488 10 1 3 6 86.36 1.57 1.1266 6 5 4 6 86.46 2.22 1.1256 9 3 3 6 89.58 2.52 1.0942 10 0 4 3 89.60 1.07 1.0940 7 2 5 6 89.75 1.63 1.0926 3 3 6 6 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.