Na2Mg6Si8O22(OH)2 Camara F, Oberti R, Iezzi G, Della Ventura G Physics and Chemistry of Minerals 30 (2003) 570-581 The P2_1/m - C2/m phase transition in synthetic amphibole Na NaMg Mg5 Si8 O22 (OH)2: thermodynamic and crystal-chemical evaluation Sample: T = 140 C _database_code_amcsd 0008833 CELL PARAMETERS: 9.7060 17.9860 5.2860 90.000 102.370 90.000 SPACE GROUP: P2_1/m X-RAY WAVELENGTH: 1.541838 Cell Volume: 901.365 Density (g/cm3): 2.934 MAX. ABS. INTENSITY / VOLUME**2: 4.826816183 RIR: 0.536 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 9.84 5.13 8.9930 0 2 0 2 10.55 51.24 8.3869 1 1 0 4 18.39 16.97 4.8239 -1 1 1 4 18.72 8.98 4.7403 2 0 0 2 19.74 33.91 4.4965 0 4 0 2 20.30 2.02 4.3749 -1 2 1 4 21.86 15.68 4.0663 1 1 1 4 23.14 43.92 3.8432 -1 3 1 4 24.68 5.37 3.6067 -2 2 1 4 26.01 70.67 3.4258 1 3 1 4 26.50 1.63 3.3632 1 5 0 4 27.34 55.33 3.2623 2 4 0 4 28.68 80.05 3.1125 3 1 0 4 29.89 38.68 2.9896 2 2 1 4 30.24 5.27 2.9556 -3 1 1 4 30.60 26.07 2.9215 -1 5 1 4 32.01 23.49 2.7956 3 3 0 4 32.87 100.00 2.7250 1 5 1 4 33.43 18.03 2.6802 -3 3 1 4 34.60 30.64 2.5924 0 6 1 4 34.75 12.73 2.5816 0 0 2 2 34.88 2.50 2.5720 -1 6 1 4 35.87 68.69 2.5037 -2 0 2 2 36.22 2.25 2.4800 1 7 0 4 36.92 3.49 2.4349 1 6 1 4 37.90 5.37 2.3742 3 5 0 4 39.13 20.28 2.3023 -3 5 1 4 39.42 15.38 2.2860 -1 7 1 4 39.58 13.85 2.2770 -4 2 1 4 40.09 2.53 2.2493 -3 0 2 2 40.11 1.19 2.2483 0 8 0 2 40.41 16.34 2.2319 -3 1 2 4 41.26 11.52 2.1881 1 7 1 4 41.27 3.25 2.1874 -2 4 2 4 41.46 42.65 2.1780 2 6 1 4 42.95 6.62 2.1060 -3 3 2 4 43.35 18.04 2.0872 2 0 2 2 44.49 6.76 2.0362 3 5 1 4 44.61 2.34 2.0314 2 8 0 4 45.50 1.31 1.9936 3 7 0 4 45.91 2.39 1.9766 1 5 2 4 46.11 7.24 1.9686 -4 0 2 2 46.44 3.52 1.9555 1 9 0 4 46.56 3.19 1.9505 -3 7 1 4 46.57 2.77 1.9503 4 2 1 4 47.69 3.93 1.9071 -3 5 2 4 48.06 2.26 1.8932 2 4 2 4 48.26 9.87 1.8857 5 1 0 4 49.08 7.43 1.8561 -1 9 1 4 49.22 1.21 1.8512 -4 6 1 4 50.48 2.84 1.8079 5 3 0 4 50.62 9.16 1.8034 -4 4 2 4 50.64 6.16 1.8025 1 9 1 4 50.76 2.93 1.7986 0 10 0 2 52.19 1.22 1.7526 -1 1 3 4 52.59 1.27 1.7404 1 7 2 4 53.74 8.98 1.7056 -5 1 2 4 54.09 5.20 1.6955 0 8 2 4 54.27 3.20 1.6904 0 2 3 4 54.29 8.89 1.6896 -1 3 3 4 54.89 5.48 1.6728 -2 8 2 4 55.25 2.68 1.6626 -3 9 1 4 55.25 35.04 1.6625 4 6 1 4 56.41 5.63 1.6312 4 8 0 4 57.17 8.62 1.6113 1 11 0 4 58.21 3.30 1.5850 4 0 2 2 58.34 24.47 1.5817 -1 5 3 4 58.40 4.19 1.5801 6 0 0 2 59.05 3.67 1.5643 2 10 1 4 60.66 2.37 1.5267 1 9 2 4 61.02 2.20 1.5184 -1 6 3 4 61.25 4.12 1.5133 5 5 1 4 61.58 17.02 1.5061 -2 6 3 4 61.91 17.16 1.4988 0 12 0 2 61.94 8.17 1.4982 -6 0 2 2 62.05 2.27 1.4958 2 2 3 4 62.09 5.73 1.4948 4 4 2 4 62.20 3.31 1.4926 0 6 3 4 62.73 2.25 1.4811 -4 8 2 4 63.71 1.24 1.4607 -2 10 2 4 64.11 6.31 1.4526 -1 7 3 4 64.13 3.66 1.4522 3 11 0 4 65.29 2.37 1.4291 -4 10 1 4 65.69 2.58 1.4214 -6 4 2 4 65.83 37.30 1.4188 -6 6 1 4 66.28 1.21 1.4101 6 2 1 4 67.46 14.02 1.3884 5 1 2 4 67.68 2.66 1.3843 -4 6 3 4 69.27 4.00 1.3564 5 3 2 4 69.44 4.96 1.3535 2 6 3 4 69.61 3.08 1.3506 7 1 0 4 69.94 3.54 1.3451 1 11 2 4 70.59 2.71 1.3343 -5 5 3 4 71.31 1.31 1.3226 -3 11 2 4 71.39 3.04 1.3212 -1 9 3 4 71.40 1.43 1.3211 7 3 0 4 71.52 2.78 1.3192 -2 0 4 2 71.60 1.70 1.3179 -7 1 2 4 71.86 3.22 1.3138 -1 1 4 4 72.69 1.89 1.3007 -5 9 2 4 72.99 7.19 1.2962 0 12 2 4 73.22 1.19 1.2928 6 8 0 4 73.24 5.19 1.2924 -7 5 1 4 73.34 8.13 1.2908 0 0 4 2 73.37 1.85 1.2905 -7 3 2 4 73.46 3.69 1.2890 6 6 1 4 73.62 1.22 1.2866 -1 3 4 4 73.66 19.14 1.2860 -2 12 2 4 73.99 1.16 1.2811 -3 9 3 4 74.97 1.80 1.2668 4 12 0 4 75.04 2.07 1.2658 -2 4 4 4 75.66 1.21 1.2569 4 2 3 4 76.03 3.65 1.2518 -4 0 4 2 76.63 1.14 1.2435 0 10 3 4 77.01 1.28 1.2383 5 11 0 4 77.25 1.71 1.2350 6 0 2 2 78.45 1.23 1.2191 -7 7 1 4 78.58 2.21 1.2174 2 12 2 4 79.77 1.22 1.2022 -6 6 3 4 81.16 1.94 1.1851 8 0 0 2 81.34 2.21 1.1829 2 0 4 2 81.34 8.15 1.1829 -5 11 2 4 82.53 1.83 1.1689 4 6 3 4 83.97 1.03 1.1525 1 15 1 4 86.88 2.39 1.1212 7 9 0 4 87.22 1.20 1.1176 5 13 0 4 87.76 3.12 1.1122 3 1 4 4 88.90 1.02 1.1009 3 13 2 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.