Fluoro-eckermannite Oberti R, Hawthorne F C, Camara F, Raudsepp M American Mineralogist 84 (1999) 102-111 Unusual M3+ cations in synthetic amphiboles with nominal fluoro-eckermannite composition: Deviations from stoichiometry and structural effects of the cummingtonite component Sample: Ga, Na.94Na1.07Mg.93Mg4.87Ga.13Si8O22F2 _database_code_amcsd 0002061 CELL PARAMETERS: 9.6660 17.9020 5.2720 90.000 102.840 90.000 SPACE GROUP: C2/m X-RAY WAVELENGTH: 1.541838 Cell Volume: 889.459 Density (g/cm3): 3.031 MAX. ABS. INTENSITY / VOLUME**2: 5.044092396 RIR: 0.542 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 9.88 3.12 8.9510 0 2 0 2 10.61 52.48 8.3393 1 1 0 4 18.41 15.48 4.8195 -1 1 1 4 18.83 5.03 4.7121 2 0 0 2 19.84 30.22 4.4755 0 4 0 2 19.92 1.65 4.4575 0 2 1 4 22.03 12.76 4.0356 1 1 1 4 23.20 34.88 3.8344 -1 3 1 4 24.71 6.51 3.6034 -2 2 1 4 26.19 71.43 3.4028 1 3 1 4 26.63 2.31 3.3470 1 5 0 4 27.49 52.64 3.2451 2 4 0 4 28.85 78.31 3.0942 3 1 0 4 30.14 38.77 2.9654 2 2 1 4 30.28 6.00 2.9517 -3 1 1 4 30.70 24.12 2.9119 -1 5 1 4 32.20 24.30 2.7798 3 3 0 4 33.07 100.00 2.7087 1 5 1 4 33.50 22.64 2.6751 -3 3 1 4 34.77 35.46 2.5804 0 6 1 4 34.91 13.82 2.5701 0 0 2 2 35.89 69.72 2.5021 -2 0 2 2 36.40 2.05 2.4682 1 7 0 4 38.11 4.87 2.3614 3 5 0 4 39.23 21.51 2.2962 -3 5 1 4 39.57 21.42 2.2773 -1 7 1 4 39.68 14.05 2.2717 -4 2 1 4 40.30 1.52 2.2378 0 8 0 2 40.42 17.46 2.2316 -3 1 2 4 41.34 4.44 2.1840 -2 4 2 4 41.50 11.47 2.1761 1 7 1 4 41.74 39.56 2.1639 2 6 1 4 42.97 7.47 2.1046 -3 3 2 4 43.71 16.44 2.0711 2 0 2 2 44.84 9.26 2.0215 3 5 1 4 44.84 2.32 2.0214 2 8 0 4 45.75 1.51 1.9833 3 7 0 4 46.12 8.77 1.9682 -4 0 2 2 46.20 2.29 1.9649 1 5 2 4 46.67 3.92 1.9462 1 9 0 4 46.72 1.94 1.9442 -3 7 1 4 46.97 3.23 1.9347 4 2 1 4 47.75 3.29 1.9046 -3 5 2 4 48.43 4.15 1.8796 2 4 2 4 48.57 9.33 1.8745 5 1 0 4 49.30 6.71 1.8484 -1 9 1 4 49.38 1.04 1.8455 -4 6 1 4 50.67 8.86 1.8017 -4 4 2 4 50.80 2.34 1.7973 5 3 0 4 50.93 5.61 1.7931 1 9 1 4 51.02 2.77 1.7902 0 10 0 2 52.91 1.53 1.7306 1 7 2 4 53.78 9.33 1.7044 -5 1 2 4 54.36 3.75 1.6877 0 8 2 4 54.47 7.90 1.6844 -1 3 3 4 54.53 3.38 1.6828 0 2 3 4 55.06 6.18 1.6680 -2 8 2 4 55.47 3.36 1.6566 -3 9 1 4 55.68 35.24 1.6506 4 6 1 4 56.74 6.49 1.6225 4 8 0 4 57.46 9.07 1.6037 1 11 0 4 58.55 25.59 1.5765 -1 5 3 4 58.76 4.11 1.5715 4 0 2 2 58.79 3.81 1.5707 6 0 0 2 59.42 3.94 1.5556 2 10 1 4 61.02 2.90 1.5184 1 9 2 4 61.74 19.42 1.5025 -2 6 3 4 61.76 4.25 1.5021 5 5 1 4 62.02 8.57 1.4963 -6 0 2 2 62.23 16.86 1.4918 0 12 0 2 62.51 3.10 1.4858 0 6 3 4 62.53 3.07 1.4854 2 2 3 4 62.66 4.03 1.4827 4 4 2 4 62.88 2.84 1.4779 -4 8 2 4 63.94 1.46 1.4559 -2 10 2 4 64.36 6.63 1.4475 -1 7 3 4 64.48 4.21 1.4451 3 11 0 4 65.57 2.66 1.4238 -4 10 1 4 65.81 2.54 1.4191 -6 4 2 4 66.10 38.22 1.4136 -6 6 1 4 67.00 1.03 1.3968 -5 3 3 4 67.77 2.01 1.3828 -4 6 3 4 68.12 15.26 1.3765 5 1 2 4 69.94 3.92 1.3451 5 3 2 4 69.96 4.83 1.3447 2 6 3 4 70.09 3.28 1.3425 7 1 0 4 70.36 5.37 1.3380 1 11 2 4 70.65 3.24 1.3333 -5 5 3 4 71.56 1.45 1.3185 -3 11 2 4 71.70 2.41 1.3163 -1 9 3 4 71.70 2.97 1.3162 -2 0 4 2 71.74 1.60 1.3156 -7 1 2 4 71.89 1.60 1.3133 7 3 0 4 72.14 4.95 1.3094 -1 1 4 4 72.90 2.10 1.2976 -5 9 2 4 73.38 7.44 1.2902 0 12 2 4 73.53 1.54 1.2881 -7 3 2 4 73.57 5.20 1.2874 -7 5 1 4 73.73 7.02 1.2850 0 0 4 2 73.92 1.85 1.2822 -1 3 4 4 73.97 20.16 1.2814 -2 12 2 4 74.08 4.02 1.2798 6 6 1 4 75.25 1.54 1.2628 -2 4 4 4 75.42 1.45 1.2604 4 12 0 4 76.08 4.22 1.2511 -4 0 4 2 77.49 1.04 1.2318 5 11 0 4 78.03 1.06 1.2246 6 0 2 2 78.82 1.09 1.2143 -7 7 1 4 79.12 1.21 1.2105 2 12 2 4 79.56 1.46 1.2049 -4 4 4 4 79.86 1.00 1.2011 -6 6 3 4 81.62 8.81 1.1796 -5 11 2 4 81.75 1.67 1.1780 8 0 0 2 81.99 3.06 1.1752 2 0 4 2 83.30 2.42 1.1600 4 6 3 4 84.48 1.13 1.1468 1 15 1 4 87.49 2.38 1.1149 7 9 0 4 87.79 1.74 1.1119 5 13 0 4 88.56 3.32 1.1042 3 1 4 4 89.58 1.00 1.0943 3 13 2 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.