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 = 370 C _database_code_amcsd 0008835 CELL PARAMETERS: 9.7370 18.0490 5.3030 90.000 102.220 90.000 SPACE GROUP: C2/m X-RAY WAVELENGTH: 1.541838 Cell Volume: 910.849 Density (g/cm3): 2.911 MAX. ABS. INTENSITY / VOLUME**2: 4.861292301 RIR: 0.544 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 9.80 4.05 9.0245 0 2 0 2 10.51 56.25 8.4180 1 1 0 4 18.35 15.73 4.8361 -1 1 1 4 18.65 10.73 4.7582 2 0 0 2 19.67 30.64 4.5122 0 4 0 2 21.11 1.22 4.2090 2 2 0 4 21.76 14.24 4.0851 1 1 1 4 23.08 42.80 3.8543 -1 3 1 4 24.62 6.31 3.6153 -2 2 1 4 25.90 67.81 3.4405 1 3 1 4 26.41 1.87 3.3751 1 5 0 4 27.24 54.62 3.2741 2 4 0 4 28.57 73.84 3.1242 3 1 0 4 29.74 36.55 3.0037 2 2 1 4 30.17 5.21 2.9627 -3 1 1 4 30.50 28.64 2.9307 -1 5 1 4 31.89 23.50 2.8060 3 3 0 4 32.73 100.00 2.7359 1 5 1 4 33.34 16.95 2.6872 -3 3 1 4 34.47 28.18 2.6017 0 6 1 4 34.61 12.99 2.5914 0 0 2 2 35.78 65.82 2.5098 -2 0 2 2 36.09 2.68 2.4887 1 7 0 4 37.75 5.45 2.3828 3 5 0 4 39.01 19.30 2.3088 -3 5 1 4 39.28 16.18 2.2935 -1 7 1 4 39.47 13.85 2.2831 -4 2 1 4 39.96 1.47 2.2561 0 8 0 2 40.32 16.49 2.2368 -3 1 2 4 41.09 11.90 2.1965 1 7 1 4 41.16 3.41 2.1934 -2 4 2 4 41.28 37.76 2.1870 2 6 1 4 42.84 6.20 2.1109 -3 3 2 4 43.14 16.20 2.0970 2 0 2 2 44.29 6.73 2.0451 3 5 1 4 44.44 2.12 2.0386 2 8 0 4 45.32 1.33 2.0008 3 7 0 4 45.71 2.88 1.9847 1 5 2 4 46.00 6.33 1.9729 -4 0 2 2 46.26 3.47 1.9623 1 9 0 4 46.34 3.13 1.9592 4 2 1 4 46.41 2.83 1.9564 -3 7 1 4 47.56 3.73 1.9120 -3 5 2 4 47.83 2.41 1.9017 2 4 2 4 48.07 9.40 1.8928 5 1 0 4 48.91 7.08 1.8623 -1 9 1 4 49.07 1.07 1.8567 -4 6 1 4 50.28 2.77 1.8146 5 3 0 4 50.44 5.55 1.8092 1 9 1 4 50.49 8.39 1.8076 -4 4 2 4 50.57 2.76 1.8049 0 10 0 2 52.01 1.00 1.7584 -1 1 3 4 52.36 1.19 1.7473 1 7 2 4 53.61 7.88 1.7095 -5 1 2 4 53.88 5.42 1.7016 0 8 2 4 54.04 2.19 1.6968 0 2 3 4 54.10 7.36 1.6952 -1 3 3 4 54.70 5.93 1.6779 -2 8 2 4 55.00 31.47 1.6696 4 6 1 4 55.06 2.64 1.6678 -3 9 1 4 56.19 5.00 1.6371 4 8 0 4 56.95 8.08 1.6170 1 11 0 4 57.90 2.42 1.5926 4 0 2 2 58.13 23.54 1.5869 -1 5 3 4 58.16 3.49 1.5861 6 0 0 2 58.80 3.72 1.5703 2 10 1 4 60.40 2.31 1.5326 1 9 2 4 60.96 3.71 1.5198 5 5 1 4 61.37 14.35 1.5106 -2 6 3 4 61.67 14.38 1.5041 0 12 0 2 61.74 2.26 1.5025 2 2 3 4 61.77 5.05 1.5018 4 4 2 4 61.78 7.22 1.5017 -6 0 2 2 61.94 3.43 1.4981 0 6 3 4 62.54 2.06 1.4851 -4 8 2 4 63.48 1.11 1.4653 -2 10 2 4 63.87 5.51 1.4575 -1 7 3 4 63.87 2.79 1.4574 3 11 0 4 65.06 2.46 1.4336 -4 10 1 4 65.51 2.35 1.4249 -6 4 2 4 65.60 32.38 1.4231 -6 6 1 4 65.96 1.10 1.4163 6 2 1 4 67.10 12.67 1.3950 5 1 2 4 67.49 1.85 1.3878 -4 6 3 4 68.90 3.29 1.3628 5 3 2 4 69.10 3.85 1.3593 2 6 3 4 69.32 2.96 1.3556 7 1 0 4 69.64 3.50 1.3502 1 11 2 4 70.40 2.46 1.3374 -5 5 3 4 71.06 1.04 1.3266 -3 11 2 4 71.09 1.32 1.3261 7 3 0 4 71.11 2.26 1.3257 -1 9 3 4 71.27 3.35 1.3232 -2 0 4 2 71.39 1.67 1.3212 -7 1 2 4 71.58 3.05 1.3183 -1 1 4 4 72.46 1.86 1.3043 -5 9 2 4 72.69 7.08 1.3008 0 12 2 4 72.90 1.15 1.2975 6 8 0 4 72.97 4.23 1.2965 -7 5 1 4 73.02 7.61 1.2957 0 0 4 2 73.10 3.33 1.2945 6 6 1 4 73.15 1.43 1.2938 -7 3 2 4 73.33 1.15 1.2910 -1 3 4 4 73.39 17.88 1.2902 -2 12 2 4 74.66 1.85 1.2713 4 12 0 4 74.77 2.02 1.2697 -2 4 4 4 75.24 1.10 1.2629 4 2 3 4 75.80 3.37 1.2549 -4 0 4 2 76.68 1.09 1.2428 5 11 0 4 76.82 1.51 1.2409 6 0 2 2 78.21 1.80 1.2222 2 12 2 4 79.23 1.12 1.2090 -4 4 4 4 79.54 1.01 1.2051 -6 6 3 4 80.79 1.45 1.1895 8 0 0 2 80.92 1.76 1.1881 2 0 4 2 81.06 7.08 1.1863 -5 11 2 4 82.07 1.93 1.1743 4 6 3 4 86.48 1.97 1.1253 7 9 0 4 86.83 1.01 1.1217 5 13 0 4 87.26 3.02 1.1173 3 1 4 4 89.66 2.25 1.0935 4 12 2 4 89.76 1.01 1.0925 7 3 2 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.