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: Cr2, Na1.00Na1.75Mg.25Mg4.25Cr.75Si8O22F2 _database_code_amcsd 0002060 CELL PARAMETERS: 9.7280 17.8250 5.2780 90.000 103.660 90.000 SPACE GROUP: C2/m X-RAY WAVELENGTH: 1.541838 Cell Volume: 889.326 Density (g/cm3): 3.059 MAX. ABS. INTENSITY / VOLUME**2: 5.726726203 RIR: 0.610 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 9.92 12.06 8.9125 0 2 0 2 10.59 76.95 8.3512 1 1 0 4 17.29 1.50 5.1287 0 0 1 2 18.31 24.74 4.8442 -1 1 1 4 18.77 4.03 4.7264 2 0 0 2 19.92 37.52 4.4563 0 4 0 2 19.97 9.13 4.4452 0 2 1 4 22.15 6.31 4.0129 1 1 1 4 23.16 20.46 3.8407 -1 3 1 4 24.52 6.43 3.6301 -2 2 1 4 26.33 70.23 3.3849 1 3 1 4 26.73 3.15 3.3357 1 5 0 4 27.51 35.00 3.2424 2 4 0 4 28.77 75.19 3.1028 3 1 0 4 29.99 3.60 2.9793 -3 1 1 4 30.29 33.21 2.9507 2 2 1 4 30.73 11.16 2.9093 -1 5 1 4 32.16 22.23 2.7837 3 3 0 4 33.24 100.00 2.6955 1 5 1 4 33.26 26.90 2.6935 -3 3 1 4 34.90 35.36 2.5707 0 6 1 4 34.99 9.48 2.5644 0 0 2 2 35.67 64.71 2.5168 -2 0 2 2 37.12 1.43 2.4221 -2 2 2 4 37.81 1.43 2.3796 -2 6 1 4 38.12 4.29 2.3609 3 5 0 4 39.08 28.67 2.3051 -3 5 1 4 39.35 11.98 2.2900 -4 2 1 4 39.67 18.63 2.2722 -1 7 1 4 39.94 1.08 2.2571 3 3 1 4 40.07 21.06 2.2503 -3 1 2 4 41.19 5.35 2.1915 -2 4 2 4 41.70 8.62 2.1659 1 7 1 4 41.95 35.17 2.1538 2 6 1 4 42.64 1.01 2.1202 -1 5 2 4 42.66 9.11 2.1192 -3 3 2 4 43.97 16.96 2.0593 2 0 2 2 44.33 1.00 2.0436 0 8 1 4 45.02 10.71 2.0135 3 5 1 4 45.65 8.20 1.9874 -4 0 2 2 45.82 2.86 1.9805 3 7 0 4 46.43 2.05 1.9558 1 5 2 4 46.64 1.26 1.9472 -3 7 1 4 46.87 4.20 1.9385 1 9 0 4 47.10 3.34 1.9294 4 2 1 4 47.51 2.36 1.9138 -3 5 2 4 48.42 8.45 1.8800 5 1 0 4 48.71 4.76 1.8694 2 4 2 4 49.18 1.91 1.8525 -4 6 1 4 49.45 7.21 1.8430 -1 9 1 4 50.27 4.51 1.8150 -4 4 2 4 50.67 1.75 1.8016 5 3 0 4 51.18 5.21 1.7849 1 9 1 4 51.25 3.12 1.7825 0 10 0 2 53.17 1.20 1.7227 1 7 2 4 53.22 7.70 1.7211 -5 1 2 4 54.47 7.51 1.6844 -1 3 3 4 54.56 1.39 1.6819 0 8 2 4 54.67 4.95 1.6790 0 2 3 4 54.97 1.46 1.6705 -3 1 3 4 55.05 7.36 1.6683 -2 8 2 4 55.47 3.32 1.6565 -3 9 1 4 55.88 31.78 1.6454 4 6 1 4 56.79 8.89 1.6212 4 8 0 4 57.72 10.03 1.5972 1 11 0 4 57.96 1.11 1.5910 -6 2 1 4 58.59 22.99 1.5756 -1 5 3 4 58.59 4.38 1.5755 6 0 0 2 59.08 5.42 1.5635 4 0 2 2 59.41 1.05 1.5559 -5 5 2 4 59.71 2.10 1.5486 2 10 1 4 61.33 4.35 1.5115 1 9 2 4 61.36 10.50 1.5109 -6 0 2 2 61.65 22.16 1.5045 -2 6 3 4 61.91 4.54 1.4987 5 5 1 4 62.53 12.97 1.4854 0 12 0 2 62.64 2.20 1.4831 -4 8 2 4 62.70 2.08 1.4817 0 6 3 4 62.89 2.85 1.4777 2 2 3 4 63.01 3.53 1.4753 4 4 2 4 64.01 1.93 1.4546 -2 10 2 4 64.44 4.89 1.4459 -1 7 3 4 64.68 5.26 1.4411 3 11 0 4 65.20 4.30 1.4309 -6 4 2 4 65.53 1.63 1.4245 -4 10 1 4 65.60 1.32 1.4231 4 10 0 4 65.75 33.69 1.4203 -6 6 1 4 66.37 1.87 1.4084 -5 3 3 4 68.46 13.85 1.3705 5 1 2 4 69.85 2.64 1.3465 7 1 0 4 70.07 4.86 1.3429 -5 5 3 4 70.29 4.84 1.3392 5 3 2 4 70.37 5.58 1.3379 2 6 3 4 70.72 7.81 1.3321 1 11 2 4 71.55 1.47 1.3186 -2 0 4 2 71.56 2.28 1.3186 -3 11 2 4 71.67 1.77 1.3168 7 3 0 4 71.84 2.50 1.3141 -1 9 3 4 72.17 6.59 1.3090 -1 1 4 4 72.57 2.08 1.3026 -5 9 2 4 73.11 7.01 1.2944 -7 5 1 4 73.71 6.48 1.2853 0 12 2 4 73.92 4.71 1.2822 0 0 4 2 73.96 3.35 1.2816 -1 3 4 4 74.12 17.86 1.2792 -2 12 2 4 74.23 3.11 1.2776 6 6 1 4 75.56 5.34 1.2584 -4 0 4 2 75.61 1.27 1.2576 4 12 0 4 78.42 1.18 1.2195 -7 7 1 4 78.96 1.42 1.2125 -2 14 1 4 79.07 1.40 1.2111 -4 4 4 4 81.38 9.27 1.1824 -5 11 2 4 81.45 2.06 1.1816 8 0 0 2 82.47 4.77 1.1696 2 0 4 2 83.87 1.70 1.1536 4 6 3 4 83.96 1.10 1.1526 -6 10 2 4 84.46 1.01 1.1470 2 10 3 4 86.94 1.44 1.1206 5 3 3 4 87.41 2.67 1.1157 7 9 0 4 87.98 1.45 1.1100 5 13 0 4 89.07 1.25 1.0992 -6 4 4 4 89.17 2.26 1.0983 3 1 4 4 89.92 1.09 1.0910 -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.