Fredrikssonite Burns P C, Cooper M A, Hawthorne F C The Canadian Mineralogist 32 (1994) 397-403 Jahn-Teller-distorted MnO6 octahedra in fredrikssonite, the fourth polymorph of Mg2Mn(BO3)O2 _database_code_amcsd 0005368 CELL PARAMETERS: 9.1980 12.5280 2.9650 90.000 90.000 90.000 SPACE GROUP: Pbam X-RAY WAVELENGTH: 1.541838 Cell Volume: 341.664 Density (g/cm3): 3.795 MAX. ABS. INTENSITY / VOLUME**2: 15.26242075 RIR: 1.310 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 14.14 2.30 6.2640 0 2 0 2 17.13 100.00 5.1774 1 2 0 4 19.30 5.94 4.5990 2 0 0 2 23.39 2.92 3.8025 1 3 0 4 28.50 7.09 3.1320 0 4 0 2 30.01 5.29 2.9781 3 1 0 4 30.14 19.91 2.9650 0 0 1 2 30.14 5.29 2.9648 1 4 0 4 32.51 15.27 2.7538 3 2 0 4 32.52 3.06 2.7530 1 1 1 8 33.44 3.17 2.6799 0 2 1 4 34.65 79.65 2.5887 2 4 0 4 36.04 72.49 2.4920 2 0 1 4 36.35 1.21 2.4714 3 3 0 4 36.77 1.90 2.4441 2 1 1 8 38.50 3.85 2.3382 1 3 1 8 38.89 4.62 2.3155 2 2 1 8 39.18 4.02 2.2995 4 0 0 2 41.02 23.21 2.2002 2 5 0 4 41.96 12.08 2.1532 0 4 1 4 42.23 5.25 2.1399 2 3 1 8 43.05 15.71 2.1012 3 1 1 8 44.49 15.15 2.0362 1 6 0 4 44.92 53.32 2.0178 3 2 1 8 46.57 10.86 1.9500 2 4 1 8 46.83 2.83 1.9401 3 5 0 4 47.84 3.85 1.9012 2 6 0 4 47.92 18.83 1.8984 3 3 1 8 50.21 1.44 1.8171 4 0 1 4 51.74 1.69 1.7669 2 5 1 8 51.80 7.36 1.7651 5 2 0 4 51.89 2.00 1.7621 3 4 1 8 52.06 1.84 1.7568 1 7 0 4 52.43 7.50 1.7451 4 2 1 8 53.06 2.74 1.7258 3 6 0 4 54.68 9.34 1.6785 1 6 1 8 57.59 3.13 1.6005 2 6 1 8 58.75 28.20 1.5717 4 4 1 8 58.98 6.43 1.5660 0 8 0 2 59.92 2.06 1.5438 1 8 0 4 61.10 17.72 1.5167 5 2 1 8 61.34 20.08 1.5114 1 7 1 8 62.24 7.47 1.4915 3 6 1 8 62.65 2.60 1.4829 5 5 0 4 62.67 20.25 1.4825 0 0 2 2 63.55 12.75 1.4640 5 3 1 8 65.49 4.63 1.4252 1 2 2 8 67.66 3.78 1.3847 0 8 1 4 67.91 1.14 1.3803 5 6 0 4 68.10 12.38 1.3769 6 4 0 4 68.53 2.73 1.3693 1 8 1 8 68.96 2.41 1.3618 6 0 1 4 71.10 4.71 1.3259 2 8 1 8 72.25 1.72 1.3077 6 5 0 4 72.40 2.63 1.3054 3 2 2 8 73.11 3.68 1.2944 4 8 0 4 73.63 13.80 1.2865 2 4 2 8 73.66 2.95 1.2860 7 2 0 4 75.91 1.01 1.2534 7 3 0 4 76.06 1.45 1.2514 5 6 1 8 76.24 2.07 1.2488 6 4 1 8 76.44 1.79 1.2460 4 0 2 4 77.66 3.33 1.2295 2 5 2 8 80.07 3.71 1.1985 1 6 2 8 80.28 1.08 1.1958 7 1 1 8 81.07 1.76 1.1862 4 8 1 8 82.51 1.16 1.1691 2 6 2 8 83.33 1.54 1.1597 3 10 0 4 84.21 5.05 1.1497 8 0 0 2 85.55 2.56 1.1352 5 2 2 8 86.56 1.14 1.1246 3 6 2 8 88.98 3.48 1.1001 4 10 0 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.