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: Sc, Na.92Na1.97Mg.03Mg3.95Sc1.05Si8O22F2 _database_code_amcsd 0002056 CELL PARAMETERS: 9.8200 18.0360 5.2900 90.000 103.640 90.000 SPACE GROUP: C2/m X-RAY WAVELENGTH: 1.541838 Cell Volume: 910.506 Density (g/cm3): 3.076 MAX. ABS. INTENSITY / VOLUME**2: 5.071211238 RIR: 0.537 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 10.49 33.38 8.4351 1 1 0 4 17.25 5.37 5.1408 0 0 1 2 17.43 2.01 5.0867 1 3 0 4 18.24 10.53 4.8633 -1 1 1 4 18.60 2.19 4.7715 2 0 0 2 19.69 29.32 4.5090 0 4 0 2 19.88 3.58 4.4661 0 2 1 4 22.04 13.93 4.0321 1 1 1 4 22.23 2.34 3.9989 -2 0 1 2 23.00 15.43 3.8670 -1 3 1 4 24.35 2.99 3.6556 -2 2 1 4 26.15 98.66 3.4080 1 3 1 4 26.29 3.15 3.3898 0 4 1 4 27.21 56.27 3.2772 2 4 0 4 28.49 69.06 3.1327 3 1 0 4 29.72 1.04 3.0060 0 6 0 2 29.75 8.90 3.0029 -3 1 1 4 29.86 1.71 2.9918 -2 4 1 4 30.08 38.91 2.9711 2 2 1 4 30.45 15.78 2.9354 -1 5 1 4 31.83 28.38 2.8117 3 3 0 4 32.94 100.00 2.7188 1 5 1 4 32.97 39.45 2.7167 -3 3 1 4 34.57 39.49 2.5949 0 6 1 4 34.91 9.11 2.5704 0 0 2 2 35.29 2.69 2.5434 2 6 0 4 35.55 77.94 2.5252 -2 0 2 2 36.11 1.84 2.4875 1 7 0 4 37.70 6.75 2.3858 3 5 0 4 38.69 24.67 2.3270 -3 5 1 4 38.99 15.93 2.3102 -4 2 1 4 39.25 30.99 2.2951 -1 7 1 4 39.61 1.63 2.2752 3 3 1 4 39.87 17.62 2.2612 -3 1 2 4 39.99 1.15 2.2545 0 8 0 2 40.96 7.96 2.2032 -2 4 2 4 41.28 8.50 2.1871 1 7 1 4 41.55 40.43 2.1736 2 6 1 4 42.39 1.29 2.1322 -1 5 2 4 42.41 11.76 2.1312 -3 3 2 4 43.77 18.33 2.0684 2 0 2 2 44.61 10.78 2.0313 3 5 1 4 45.29 1.41 2.0022 3 7 0 4 45.36 10.19 1.9995 -4 0 2 2 46.14 2.28 1.9672 1 5 2 4 46.29 6.87 1.9612 1 9 0 4 46.70 3.73 1.9452 4 2 1 4 47.17 4.68 1.9268 -3 5 2 4 47.93 11.29 1.8980 5 1 0 4 48.42 4.92 1.8800 2 4 2 4 48.67 2.97 1.8707 -4 6 1 4 48.90 6.28 1.8627 -1 9 1 4 49.23 1.79 1.8507 -5 3 1 4 49.89 6.83 1.8278 -4 4 2 4 50.15 1.63 1.8191 5 3 0 4 50.61 4.04 1.8036 0 10 0 2 50.61 5.34 1.8035 1 9 1 4 52.76 1.94 1.7350 1 7 2 4 52.81 6.51 1.7334 -5 1 2 4 54.11 1.52 1.6949 0 8 2 4 54.30 9.65 1.6894 -1 3 3 4 54.38 2.10 1.6871 2 10 0 4 54.51 4.59 1.6835 0 2 3 4 54.57 7.67 1.6818 -2 8 2 4 54.84 3.96 1.6741 -3 9 1 4 55.32 33.43 1.6606 4 6 1 4 56.13 10.07 1.6386 4 8 0 4 56.99 9.68 1.6160 1 11 0 4 57.38 1.05 1.6059 -6 2 1 4 57.99 4.79 1.5905 6 0 0 2 58.33 24.50 1.5820 -1 5 3 4 58.68 4.68 1.5734 4 0 2 2 59.03 3.17 1.5648 2 10 1 4 60.78 4.40 1.5240 1 9 2 4 60.83 11.99 1.5227 -6 0 2 2 61.30 5.59 1.5122 5 5 1 4 61.31 22.71 1.5119 -2 6 3 4 61.72 14.84 1.5030 0 12 0 2 62.04 2.38 1.4959 -4 8 2 4 62.38 2.32 1.4887 0 6 3 4 62.52 4.02 1.4855 4 4 2 4 62.62 3.49 1.4834 2 2 3 4 63.37 1.83 1.4677 -2 10 2 4 63.87 4.44 1.4574 3 11 0 4 64.06 5.59 1.4535 -1 7 3 4 64.60 3.92 1.4427 -6 4 2 4 64.75 2.64 1.4397 -4 10 1 4 64.80 1.79 1.4387 4 10 0 4 65.03 36.83 1.4343 -6 6 1 4 65.96 2.35 1.4163 -5 3 3 4 67.92 15.83 1.3800 5 1 2 4 69.10 2.94 1.3594 7 1 0 4 69.10 1.18 1.3594 2 10 2 4 69.58 4.25 1.3512 -5 5 3 4 69.72 4.48 1.3488 5 3 2 4 69.95 4.93 1.3450 2 6 3 4 70.00 6.87 1.3441 1 11 2 4 70.31 1.33 1.3388 -7 1 2 4 70.79 2.20 1.3310 -3 11 2 4 70.88 1.89 1.3295 7 3 0 4 71.31 2.16 1.3226 -1 9 3 4 71.36 2.13 1.3217 -2 0 4 2 71.76 1.04 1.3154 1 13 1 4 71.81 2.76 1.3145 -5 9 2 4 71.98 6.99 1.3119 -1 1 4 4 72.29 7.29 1.3069 -7 5 1 4 72.91 8.76 1.2975 0 12 2 4 73.30 20.21 1.2915 -2 12 2 4 73.44 4.19 1.2894 6 6 1 4 73.72 5.34 1.2852 0 0 4 2 73.73 2.80 1.2850 -1 3 4 4 74.63 1.30 1.2717 4 12 0 4 74.86 1.02 1.2683 -2 4 4 4 75.26 5.88 1.2626 -4 0 4 2 76.71 1.20 1.2423 0 10 3 4 77.50 1.38 1.2316 -7 7 1 4 77.70 1.09 1.2290 6 0 2 2 77.74 1.22 1.2285 -1 13 2 4 77.91 1.43 1.2262 -2 14 1 4 78.70 1.38 1.2158 -4 4 4 4 80.45 8.46 1.1938 -5 11 2 4 80.52 2.16 1.1929 8 0 0 2 82.14 4.38 1.1734 2 0 4 2 83.00 1.67 1.1635 -6 10 2 4 83.24 2.55 1.1607 4 6 3 4 83.73 1.39 1.1551 -8 4 2 4 83.74 1.14 1.1550 2 10 3 4 83.78 1.11 1.1546 1 15 1 4 86.29 1.12 1.1273 5 3 3 4 86.30 3.33 1.1272 7 9 0 4 86.78 2.27 1.1222 5 13 0 4 88.49 1.41 1.1049 -6 4 4 4 88.73 2.86 1.1025 3 1 4 4 88.88 1.43 1.1011 0 16 1 4 89.05 1.71 1.0994 -7 7 3 4 89.05 1.25 1.0994 3 13 2 4 89.65 1.41 1.0936 5 5 3 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.