Slawsonite Benna P, Nestola F, Ballaran T B, Balic-Zunic T, Lundegaard L F, Bruno E American Mineralogist 92 (2007) 1190-1199 The high-pressure structural configurations of Ca0.2Sr0.8Al2Si2O8 feldspar: The I-1-I2/c and I2/c-P2_1/c phase transitions Sample: P = 7.4 GPa Locality: synthetic _database_code_amcsd 0004411 CELL PARAMETERS: 8.1160 12.4100 13.7280 90.000 114.190 90.000 SPACE GROUP: P2_1/c X-RAY WAVELENGTH: 1.541838 Cell Volume: 1261.267 Density (g/cm3): 3.330 MAX. ABS. INTENSITY / VOLUME**2: 10.00680668 RIR: 0.978 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 13.93 1.29 6.3579 1 1 0 4 14.14 5.51 6.2613 0 0 2 2 14.27 15.44 6.2050 0 2 0 2 14.30 1.25 6.1930 -1 0 2 2 15.99 18.29 5.5413 -1 1 2 4 20.15 18.20 4.4074 0 2 2 4 22.03 1.65 4.0346 1 0 2 2 22.34 5.22 3.9800 -2 0 2 2 22.47 1.52 3.9564 0 1 3 4 22.64 1.79 3.9279 0 3 1 4 23.47 4.32 3.7899 -2 1 2 4 24.04 10.00 3.7017 2 0 0 2 24.65 37.70 3.6112 1 3 0 4 25.10 1.89 3.5472 2 1 0 4 25.90 26.55 3.4399 -1 3 2 4 25.96 1.32 3.4316 -1 0 4 2 26.61 23.39 3.3501 -2 2 2 4 26.96 65.48 3.3075 -1 1 4 4 27.03 1.82 3.2987 1 3 1 4 28.07 100.00 3.1790 2 2 0 4 28.51 40.54 3.1306 0 0 4 2 28.78 6.82 3.1025 0 4 0 2 28.83 56.16 3.0965 -2 0 4 2 30.96 57.77 2.8883 1 3 2 4 32.02 4.33 2.7950 0 2 4 4 32.20 23.33 2.7799 0 4 2 4 32.27 1.39 2.7739 -1 4 2 4 32.31 4.08 2.7707 -2 2 4 4 33.92 3.00 2.6429 -3 1 2 4 33.94 32.84 2.6411 -1 3 4 4 35.90 9.63 2.5014 2 2 2 4 36.17 19.44 2.4835 1 1 4 4 36.60 1.38 2.4550 0 1 5 4 36.69 9.75 2.4496 -3 1 4 4 36.73 48.35 2.4469 -2 4 2 4 37.15 10.31 2.4204 3 1 0 4 38.32 1.18 2.3490 -2 4 3 4 38.36 1.38 2.3466 1 2 4 4 38.85 6.10 2.3179 -3 2 4 4 39.04 3.35 2.3073 0 5 2 4 39.10 13.67 2.3039 -1 5 2 4 39.52 2.19 2.2805 2 3 2 4 39.78 1.82 2.2659 -1 0 6 2 39.82 9.53 2.2639 -3 3 2 4 39.96 4.10 2.2561 -2 0 6 2 40.47 6.32 2.2290 -1 1 6 4 40.65 1.23 2.2197 -2 1 6 4 41.79 7.90 2.1613 1 3 4 4 42.25 4.91 2.1388 -3 3 4 4 42.64 6.45 2.1203 -2 2 6 4 42.77 19.34 2.1140 1 5 2 4 43.35 1.13 2.0871 0 0 6 2 43.77 19.08 2.0683 0 6 0 2 43.86 1.09 2.0643 -3 0 6 2 43.99 1.17 2.0582 0 1 6 4 44.16 5.92 2.0509 2 4 2 4 44.39 1.69 2.0407 0 6 1 4 44.49 1.09 2.0364 -3 1 6 4 44.93 4.07 2.0173 2 0 4 2 45.03 3.56 2.0133 -4 0 2 2 45.08 1.86 2.0111 -1 5 4 4 45.27 7.30 2.0030 3 1 2 4 45.56 1.02 1.9912 2 1 4 4 45.58 1.99 1.9900 -4 0 4 2 45.65 3.43 1.9873 -1 3 6 4 45.87 2.88 1.9782 0 2 6 4 46.22 4.69 1.9640 0 6 2 4 46.35 1.66 1.9588 -3 2 6 4 47.39 8.45 1.9185 2 2 4 4 47.48 9.30 1.9150 -4 2 2 4 48.01 9.07 1.8949 -4 2 4 4 49.23 11.30 1.8508 4 0 0 2 49.34 6.79 1.8471 -3 3 6 4 49.68 3.04 1.8353 -2 6 2 4 49.86 1.20 1.8288 -3 5 2 4 50.06 7.10 1.8221 3 3 2 4 50.41 1.78 1.8103 -4 3 2 4 50.60 3.93 1.8038 1 1 6 4 50.78 5.77 1.7980 -4 0 6 2 51.53 6.58 1.7734 1 5 4 4 51.93 8.08 1.7609 -3 5 4 4 52.28 1.10 1.7500 3 5 0 4 52.87 12.08 1.7317 0 4 6 4 53.07 3.46 1.7257 0 6 4 4 53.26 4.59 1.7199 -2 6 4 4 53.30 1.14 1.7187 -3 4 6 4 53.40 17.62 1.7158 -2 0 8 2 54.24 1.69 1.6912 2 4 4 4 54.32 6.92 1.6889 -4 4 2 4 54.80 2.05 1.6751 -4 4 4 4 55.97 1.01 1.6430 -3 6 2 4 56.65 2.36 1.6248 3 1 4 4 56.85 2.51 1.6195 -2 7 2 4 57.41 2.06 1.6051 4 0 2 2 58.00 1.02 1.5901 -2 7 3 4 58.12 9.49 1.5871 -3 5 6 4 58.61 6.04 1.5751 -1 7 4 4 58.77 8.48 1.5712 3 5 2 4 59.01 1.07 1.5653 0 0 8 2 59.08 1.14 1.5636 -4 5 2 4 59.60 3.57 1.5512 0 8 0 2 60.79 3.17 1.5237 3 3 4 4 61.05 5.82 1.5178 0 2 8 4 61.09 5.12 1.5169 2 2 6 4 61.49 3.34 1.5079 -5 3 4 4 61.75 6.00 1.5022 -4 2 8 4 62.44 1.09 1.4874 2 7 2 4 63.30 3.59 1.4691 0 6 6 4 64.10 1.40 1.4528 1 7 4 4 64.24 1.25 1.4500 -4 3 8 4 64.30 1.07 1.4487 3 6 2 4 64.49 5.56 1.4450 -5 3 6 4 64.60 3.25 1.4427 -4 6 2 4 65.21 10.99 1.4307 2 8 0 4 66.33 2.41 1.4092 1 1 8 4 67.00 6.15 1.3968 2 4 6 4 67.00 1.50 1.3967 2 8 1 4 67.03 2.26 1.3963 -1 7 6 4 67.15 2.47 1.3941 5 3 0 4 67.34 3.04 1.3906 -5 1 8 4 67.63 1.20 1.3853 -4 4 8 4 67.97 3.94 1.3792 4 6 0 4 68.68 5.73 1.3667 4 0 4 2 69.50 5.11 1.3525 -6 0 4 2 70.53 1.21 1.3352 3 7 2 4 71.43 3.44 1.3206 -2 6 8 4 71.64 1.16 1.3173 -6 0 2 2 71.66 1.31 1.3170 5 1 2 4 71.87 1.11 1.3136 -4 5 8 4 72.11 1.59 1.3099 -5 5 6 4 73.47 1.57 1.2889 -4 2 10 4 74.10 4.12 1.2795 -1 9 4 4 74.19 1.48 1.2782 -2 8 6 4 74.93 2.36 1.2674 2 0 8 2 75.17 5.40 1.2639 -1 3 10 4 75.35 2.25 1.2614 5 3 2 4 76.00 2.72 1.2522 -2 4 10 4 76.20 1.33 1.2494 -6 0 8 2 76.81 1.27 1.2410 0 10 0 2 77.33 1.19 1.2339 6 0 0 2 77.65 4.85 1.2297 2 8 4 4 78.12 5.70 1.2235 -4 8 4 4 78.39 1.40 1.2198 -6 4 6 4 78.94 3.78 1.2128 -4 4 10 4 79.14 1.82 1.2102 6 2 0 4 80.26 1.56 1.1961 -3 5 10 4 81.38 1.15 1.1824 3 5 6 4 82.39 1.06 1.1705 -1 5 10 4 84.13 1.48 1.1507 -2 8 8 4 84.50 2.77 1.1465 6 4 0 4 84.98 1.28 1.1414 -2 6 10 4 85.08 1.35 1.1402 4 6 4 4 86.57 1.03 1.1244 3 1 8 4 88.80 2.36 1.1018 0 8 8 4 89.42 2.09 1.0958 -4 8 8 4 89.74 2.10 1.0927 4 4 6 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.