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: Cr1, Na1.00Na1.97Mg.03Mg4.03Cr.97Si8O22F2 _database_code_amcsd 0002059 CELL PARAMETERS: 9.7220 17.8130 5.2820 90.000 103.690 90.000 SPACE GROUP: C2/m X-RAY WAVELENGTH: 1.541838 Cell Volume: 888.739 Density (g/cm3): 3.111 MAX. ABS. INTENSITY / VOLUME**2: 5.695009624 RIR: 0.596 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 9.93 7.95 8.9065 0 2 0 2 10.60 63.05 8.3451 1 1 0 4 17.28 4.46 5.1319 0 0 1 2 17.64 1.08 5.0270 1 3 0 4 18.30 20.69 4.8470 -1 1 1 4 18.79 2.19 4.7229 2 0 0 2 19.94 35.99 4.4532 0 4 0 2 19.97 9.77 4.4466 0 2 1 4 22.15 7.19 4.0131 1 1 1 4 22.36 1.40 3.9755 -2 0 1 2 23.16 13.15 3.8411 -1 3 1 4 24.52 5.42 3.6303 -2 2 1 4 26.33 79.41 3.3844 1 3 1 4 26.74 2.44 3.3334 1 5 0 4 27.53 36.34 3.2401 2 4 0 4 28.79 72.35 3.1005 3 1 0 4 30.00 4.59 2.9788 -3 1 1 4 30.30 33.25 2.9497 2 2 1 4 30.74 12.02 2.9086 -1 5 1 4 32.18 25.83 2.7817 3 3 0 4 33.25 100.00 2.6945 1 5 1 4 33.27 32.08 2.6928 -3 3 1 4 34.91 38.95 2.5698 0 6 1 4 34.97 8.14 2.5660 0 0 2 2 35.65 69.32 2.5185 -2 0 2 2 35.72 1.73 2.5135 2 6 0 4 37.10 1.03 2.4235 -2 2 2 4 38.14 4.58 2.3593 3 5 0 4 39.09 27.76 2.3043 -3 5 1 4 39.36 12.67 2.2891 -4 2 1 4 39.68 19.72 2.2713 -1 7 1 4 39.97 1.49 2.2559 3 3 1 4 40.05 20.54 2.2512 -3 1 2 4 41.18 6.30 2.1922 -2 4 2 4 41.72 7.87 2.1649 1 7 1 4 41.97 36.45 2.1527 2 6 1 4 42.63 1.20 2.1207 -1 5 2 4 42.65 10.98 2.1199 -3 3 2 4 43.97 16.93 2.0595 2 0 2 2 45.05 11.22 2.0124 3 5 1 4 45.64 8.94 1.9878 -4 0 2 2 45.85 2.60 1.9791 3 7 0 4 46.43 2.19 1.9559 1 5 2 4 46.90 5.16 1.9372 1 9 0 4 47.13 3.66 1.9282 4 2 1 4 47.50 2.62 1.9141 -3 5 2 4 48.46 8.26 1.8786 5 1 0 4 48.71 5.33 1.8693 2 4 2 4 49.21 2.68 1.8516 -4 6 1 4 49.48 6.55 1.8421 -1 9 1 4 49.75 1.22 1.8328 -5 3 1 4 50.27 4.50 1.8151 -4 4 2 4 50.71 1.51 1.8002 5 3 0 4 51.21 6.00 1.7840 1 9 1 4 51.29 3.64 1.7813 0 10 0 2 53.17 1.22 1.7225 1 7 2 4 53.22 6.90 1.7211 -5 1 2 4 54.44 7.63 1.6855 -1 3 3 4 54.57 1.11 1.6817 0 8 2 4 54.63 5.08 1.6799 0 2 3 4 54.93 1.40 1.6716 -3 1 3 4 55.05 7.04 1.6682 -2 8 2 4 55.50 3.66 1.6556 -3 9 1 4 55.91 32.06 1.6444 4 6 1 4 56.83 9.47 1.6200 4 8 0 4 57.76 9.94 1.5961 1 11 0 4 58.00 1.10 1.5902 -6 2 1 4 58.56 22.97 1.5764 -1 5 3 4 58.64 4.53 1.5743 6 0 0 2 59.10 5.59 1.5630 4 0 2 2 59.75 2.01 1.5477 2 10 1 4 61.35 4.96 1.5112 1 9 2 4 61.37 11.03 1.5107 -6 0 2 2 61.62 23.00 1.5051 -2 6 3 4 61.96 4.71 1.4978 5 5 1 4 62.58 13.11 1.4844 0 12 0 2 62.65 2.21 1.4828 -4 8 2 4 62.68 2.04 1.4822 0 6 3 4 62.88 3.08 1.4780 2 2 3 4 63.03 3.05 1.4748 4 4 2 4 64.02 2.24 1.4543 -2 10 2 4 64.42 4.53 1.4463 -1 7 3 4 64.73 5.28 1.4401 3 11 0 4 65.21 4.37 1.4306 -6 4 2 4 65.57 1.73 1.4237 -4 10 1 4 65.65 1.39 1.4221 4 10 0 4 65.79 33.59 1.4194 -6 6 1 4 66.35 2.44 1.4088 -5 3 3 4 68.49 14.17 1.3699 5 1 2 4 69.91 2.78 1.3455 7 1 0 4 70.05 4.72 1.3432 -5 5 3 4 70.33 4.80 1.3386 5 3 2 4 70.36 5.60 1.3380 2 6 3 4 70.75 8.26 1.3316 1 11 2 4 71.49 1.29 1.3196 -2 0 4 2 71.58 2.39 1.3182 -3 11 2 4 71.73 1.73 1.3158 7 3 0 4 71.83 2.57 1.3143 -1 9 3 4 72.11 6.94 1.3099 -1 1 4 4 72.60 2.36 1.3022 -5 9 2 4 73.16 7.23 1.2936 -7 5 1 4 73.74 5.93 1.2849 0 12 2 4 73.87 4.21 1.2830 0 0 4 2 73.90 3.56 1.2824 -1 3 4 4 74.15 18.23 1.2788 -2 12 2 4 74.29 3.11 1.2767 6 6 1 4 75.50 5.62 1.2593 -4 0 4 2 75.68 1.36 1.2567 4 12 0 4 78.48 1.13 1.2188 -7 7 1 4 79.01 1.49 1.2118 -2 14 1 4 79.02 1.27 1.2118 -4 4 4 4 81.42 9.04 1.1820 -5 11 2 4 81.52 2.06 1.1807 8 0 0 2 82.43 4.92 1.1700 2 0 4 2 83.88 1.67 1.1534 4 6 3 4 84.00 1.18 1.1521 -6 10 2 4 84.47 1.04 1.1469 2 10 3 4 86.96 1.48 1.1203 5 3 3 4 87.49 2.62 1.1149 7 9 0 4 88.06 1.37 1.1092 5 13 0 4 89.03 1.33 1.0996 -6 4 4 4 89.14 2.23 1.0985 3 1 4 4 89.93 1.15 1.0909 -7 7 3 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.