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: Al, Na.98Na1.10Mg.90Mg4.88Al.12Si8O22F2 _database_code_amcsd 0002055 CELL PARAMETERS: 9.6680 17.9160 5.2710 90.000 102.820 90.000 SPACE GROUP: C2/m X-RAY WAVELENGTH: 1.541838 Cell Volume: 890.241 Density (g/cm3): 3.008 MAX. ABS. INTENSITY / VOLUME**2: 4.865860858 RIR: 0.527 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 9.87 1.63 8.9580 0 2 0 2 10.60 48.43 8.3426 1 1 0 4 18.41 14.29 4.8188 -1 1 1 4 18.83 6.67 4.7135 2 0 0 2 19.82 30.00 4.4790 0 4 0 2 22.02 14.51 4.0362 1 1 1 4 23.19 39.97 3.8351 -1 3 1 4 24.71 5.80 3.6035 -2 2 1 4 26.18 69.37 3.4039 1 3 1 4 26.61 1.85 3.3494 1 5 0 4 27.47 54.92 3.2469 2 4 0 4 28.85 77.93 3.0951 3 1 0 4 30.13 41.45 2.9663 2 2 1 4 30.28 6.79 2.9518 -3 1 1 4 30.69 26.97 2.9131 -1 5 1 4 32.19 23.03 2.7809 3 3 0 4 33.05 100.00 2.7101 1 5 1 4 33.49 21.22 2.6756 -3 3 1 4 34.75 33.69 2.5819 0 6 1 4 34.91 15.02 2.5698 0 0 2 2 35.90 70.10 2.5016 -2 0 2 2 36.37 2.27 2.4700 1 7 0 4 38.09 5.81 2.3625 3 5 0 4 39.22 20.27 2.2970 -3 5 1 4 39.55 21.51 2.2786 -1 7 1 4 39.67 15.27 2.2720 -4 2 1 4 40.27 1.87 2.2395 0 8 0 2 40.43 17.63 2.2313 -3 1 2 4 41.34 4.39 2.1840 -2 4 2 4 41.47 12.92 2.1774 1 7 1 4 41.72 39.17 2.1650 2 6 1 4 42.98 7.02 2.1045 -3 3 2 4 43.70 15.86 2.0713 2 0 2 2 44.81 2.88 2.0228 2 8 0 4 44.81 8.58 2.0224 3 5 1 4 45.72 1.61 1.9845 3 7 0 4 46.12 8.18 1.9680 -4 0 2 2 46.19 2.00 1.9654 1 5 2 4 46.63 3.76 1.9477 1 9 0 4 46.70 2.01 1.9451 -3 7 1 4 46.95 3.16 1.9353 4 2 1 4 47.75 3.69 1.9047 -3 5 2 4 48.42 4.09 1.8800 2 4 2 4 48.55 9.47 1.8750 5 1 0 4 49.26 7.15 1.8496 -1 9 1 4 49.37 1.04 1.8461 -4 6 1 4 50.67 9.71 1.8018 -4 4 2 4 50.78 2.67 1.7979 5 3 0 4 50.89 5.51 1.7943 1 9 1 4 50.97 2.63 1.7916 0 10 0 2 52.89 1.42 1.7312 1 7 2 4 53.79 9.32 1.7043 -5 1 2 4 54.34 4.36 1.6883 0 8 2 4 54.48 7.34 1.6843 -1 3 3 4 54.53 3.42 1.6827 0 2 3 4 55.04 5.82 1.6686 -2 8 2 4 55.44 3.16 1.6575 -3 9 1 4 55.66 34.94 1.6514 4 6 1 4 56.70 6.08 1.6234 4 8 0 4 57.42 8.57 1.6049 1 11 0 4 58.55 25.19 1.5765 -1 5 3 4 58.74 3.87 1.5718 4 0 2 2 58.77 3.69 1.5712 6 0 0 2 59.37 3.99 1.5566 2 10 1 4 60.99 2.68 1.5191 1 9 2 4 61.73 4.08 1.5027 5 5 1 4 61.74 18.95 1.5026 -2 6 3 4 62.02 8.29 1.4964 -6 0 2 2 62.18 17.05 1.4930 0 12 0 2 62.50 2.96 1.4860 0 6 3 4 62.52 2.95 1.4855 2 2 3 4 62.63 4.18 1.4832 4 4 2 4 62.86 3.00 1.4783 -4 8 2 4 63.91 1.32 1.4566 -2 10 2 4 64.35 6.92 1.4477 -1 7 3 4 64.43 3.93 1.4460 3 11 0 4 65.53 2.59 1.4245 -4 10 1 4 65.80 2.47 1.4193 -6 4 2 4 66.08 37.72 1.4140 -6 6 1 4 67.77 1.89 1.3828 -4 6 3 4 68.10 15.18 1.3769 5 1 2 4 69.91 3.59 1.3455 5 3 2 4 69.95 4.51 1.3449 2 6 3 4 70.07 3.33 1.3429 7 1 0 4 70.32 5.19 1.3387 1 11 2 4 70.65 3.08 1.3333 -5 5 3 4 71.53 1.27 1.3191 -3 11 2 4 71.68 2.21 1.3167 -1 9 3 4 71.72 3.21 1.3160 -2 0 4 2 71.74 1.73 1.3157 -7 1 2 4 71.86 1.44 1.3137 7 3 0 4 72.15 4.81 1.3092 -1 1 4 4 72.87 2.00 1.2980 -5 9 2 4 73.34 7.57 1.2909 0 12 2 4 73.52 1.72 1.2882 -7 3 2 4 73.55 4.94 1.2878 -7 5 1 4 73.74 7.07 1.2849 0 0 4 2 73.93 1.53 1.2821 -1 3 4 4 73.93 20.27 1.2820 -2 12 2 4 74.05 4.21 1.2803 6 6 1 4 74.18 1.05 1.2784 -3 9 3 4 75.26 1.57 1.2626 -2 4 4 4 75.36 1.51 1.2612 4 12 0 4 76.10 3.97 1.2508 -4 0 4 2 77.44 1.08 1.2325 5 11 0 4 78.00 1.02 1.2250 6 0 2 2 78.79 1.16 1.2147 -7 7 1 4 79.06 1.28 1.2112 2 12 2 4 79.57 1.43 1.2047 -4 4 4 4 79.85 1.05 1.2012 -6 6 3 4 81.58 8.38 1.1801 -5 11 2 4 81.72 1.61 1.1784 8 0 0 2 81.98 2.84 1.1753 2 0 4 2 83.28 2.39 1.1603 4 6 3 4 84.40 1.08 1.1477 1 15 1 4 87.44 2.27 1.1154 7 9 0 4 87.72 1.61 1.1126 5 13 0 4 88.55 3.29 1.1043 3 1 4 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.