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 = 270 C _database_code_amcsd 0008834 CELL PARAMETERS: 9.7230 18.0270 5.3010 90.000 102.260 90.000 SPACE GROUP: C2/m X-RAY WAVELENGTH: 1.541838 Cell Volume: 907.951 Density (g/cm3): 2.920 MAX. ABS. INTENSITY / VOLUME**2: 4.878272679 RIR: 0.544 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 9.81 3.84 9.0135 0 2 0 2 10.52 55.22 8.4053 1 1 0 4 18.35 15.42 4.8341 -1 1 1 4 18.68 10.54 4.7506 2 0 0 2 19.70 31.50 4.5068 0 4 0 2 21.78 14.79 4.0808 1 1 1 4 23.09 42.03 3.8516 -1 3 1 4 24.64 6.38 3.6125 -2 2 1 4 25.93 68.34 3.4367 1 3 1 4 26.44 1.75 3.3709 1 5 0 4 27.28 52.88 3.2696 2 4 0 4 28.62 74.42 3.1193 3 1 0 4 29.79 38.29 2.9996 2 2 1 4 30.20 5.10 2.9597 -3 1 1 4 30.53 29.00 2.9280 -1 5 1 4 31.94 24.20 2.8018 3 3 0 4 32.77 100.00 2.7328 1 5 1 4 33.38 17.16 2.6844 -3 3 1 4 34.51 30.18 2.5990 0 6 1 4 34.63 12.98 2.5901 0 0 2 2 35.79 66.45 2.5089 -2 0 2 2 36.14 2.53 2.4856 1 7 0 4 37.81 5.72 2.3794 3 5 0 4 39.06 19.79 2.3063 -3 5 1 4 39.32 16.48 2.2912 -1 7 1 4 39.52 14.44 2.2804 -4 2 1 4 40.01 1.62 2.2534 0 8 0 2 40.34 17.23 2.2357 -3 1 2 4 41.14 12.19 2.1939 1 7 1 4 41.18 3.61 2.1921 -2 4 2 4 41.34 39.37 2.1842 2 6 1 4 42.87 6.29 2.1097 -3 3 2 4 43.19 17.59 2.0948 2 0 2 2 44.36 6.56 2.0422 3 5 1 4 44.50 2.15 2.0359 2 8 0 4 45.39 1.35 1.9981 3 7 0 4 45.76 2.76 1.9829 1 5 2 4 46.04 6.68 1.9715 -4 0 2 2 46.33 3.50 1.9599 1 9 0 4 46.42 3.07 1.9562 4 2 1 4 46.47 2.98 1.9542 -3 7 1 4 47.59 3.70 1.9107 -3 5 2 4 47.89 2.29 1.8996 2 4 2 4 48.15 9.49 1.8898 5 1 0 4 48.96 7.15 1.8603 -1 9 1 4 49.13 1.11 1.8545 -4 6 1 4 50.36 2.71 1.8118 5 3 0 4 50.50 5.72 1.8071 1 9 1 4 50.53 8.58 1.8063 -4 4 2 4 50.64 2.86 1.8027 0 10 0 2 52.03 1.01 1.7577 -1 1 3 4 52.42 1.35 1.7456 1 7 2 4 53.66 8.25 1.7080 -5 1 2 4 53.93 5.52 1.7000 0 8 2 4 54.08 2.38 1.6959 0 2 3 4 54.13 7.75 1.6945 -1 3 3 4 54.75 6.03 1.6765 -2 8 2 4 55.09 32.64 1.6671 4 6 1 4 55.13 2.78 1.6659 -3 9 1 4 56.27 5.17 1.6348 4 8 0 4 57.03 8.46 1.6150 1 11 0 4 57.99 2.73 1.5904 4 0 2 2 58.16 24.08 1.5861 -1 5 3 4 58.27 3.82 1.5835 6 0 0 2 58.88 3.81 1.5683 2 10 1 4 60.47 2.56 1.5310 1 9 2 4 61.07 3.81 1.5175 5 5 1 4 61.41 15.66 1.5098 -2 6 3 4 61.75 15.15 1.5023 0 12 0 2 61.80 2.30 1.5011 2 2 3 4 61.84 7.61 1.5002 -6 0 2 2 61.86 5.36 1.4998 4 4 2 4 61.99 3.65 1.4971 0 6 3 4 62.61 2.22 1.4838 -4 8 2 4 63.55 1.30 1.4640 -2 10 2 4 63.91 5.92 1.4565 -1 7 3 4 63.96 2.90 1.4555 3 11 0 4 65.15 2.56 1.4319 -4 10 1 4 65.58 2.56 1.4234 -6 4 2 4 65.70 34.10 1.4213 -6 6 1 4 66.08 1.18 1.4140 6 2 1 4 67.21 13.20 1.3930 5 1 2 4 67.54 2.04 1.3869 -4 6 3 4 69.01 3.62 1.3608 5 3 2 4 69.18 4.16 1.3580 2 6 3 4 69.44 2.92 1.3535 7 1 0 4 69.72 3.71 1.3487 1 11 2 4 70.45 2.54 1.3365 -5 5 3 4 71.14 1.13 1.3253 -3 11 2 4 71.18 2.44 1.3247 -1 9 3 4 71.22 1.41 1.3240 7 3 0 4 71.30 3.37 1.3227 -2 0 4 2 71.48 1.69 1.3198 -7 1 2 4 71.61 3.37 1.3177 -1 1 4 4 72.55 1.93 1.3030 -5 9 2 4 72.78 7.26 1.2995 0 12 2 4 73.03 1.23 1.2956 6 8 0 4 73.07 8.10 1.2950 0 0 4 2 73.09 4.41 1.2947 -7 5 1 4 73.23 3.27 1.2925 6 6 1 4 73.24 1.51 1.2923 -7 3 2 4 73.37 1.28 1.2904 -1 3 4 4 73.47 19.11 1.2889 -2 12 2 4 74.77 2.00 1.2696 4 12 0 4 74.80 2.16 1.2692 -2 4 4 4 75.35 1.19 1.2614 4 2 3 4 75.84 3.59 1.2545 -4 0 4 2 76.81 1.14 1.2410 5 11 0 4 76.95 1.56 1.2390 6 0 2 2 78.28 1.04 1.2213 -7 7 1 4 78.32 1.96 1.2208 2 12 2 4 79.27 1.22 1.2085 -4 4 4 4 79.61 1.04 1.2042 -6 6 3 4 80.95 1.62 1.1877 8 0 0 2 80.99 1.99 1.1871 2 0 4 2 81.16 7.64 1.1851 -5 11 2 4 82.19 1.92 1.1729 4 6 3 4 86.64 2.14 1.1236 7 9 0 4 86.98 1.07 1.1202 5 13 0 4 87.36 3.26 1.1162 3 1 4 4 89.81 2.69 1.0921 4 12 2 4 89.94 1.07 1.0909 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.