Akermanite Merlini M, Gemmi M, Hanfland M, Crichton W American Mineralogist 94 (2009) 704-709 High-pressure behavior of akermanite and gehlenite and phase stability of the normal structures in melelites Note: P = 15.7 GPa Locality: synthetic _database_code_amcsd 0004935 CELL PARAMETERS: 8.8200 7.3400 9.1300 90.000 115.100 90.000 SPACE GROUP: P2_1/n X-RAY WAVELENGTH: 1.541838 Cell Volume: 535.250 Density (g/cm3): 3.383 MAX. ABS. INTENSITY / VOLUME**2: 4.427342587 RIR: 0.426 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 16.15 5.07 5.4890 0 1 1 4 16.40 1.08 5.4045 1 1 0 4 16.83 12.15 5.2691 -1 1 1 4 22.08 3.54 4.0254 1 1 1 4 22.26 14.00 3.9936 2 0 0 2 23.03 1.01 3.8617 -1 1 2 4 23.57 93.87 3.7743 -2 1 1 4 24.72 1.38 3.6019 0 1 2 4 25.39 22.51 3.5080 2 1 0 4 26.50 22.76 3.3636 -2 1 2 4 26.57 2.54 3.3544 0 2 1 4 26.73 2.19 3.3348 1 2 0 4 27.00 2.62 3.3023 -1 2 1 4 29.46 40.61 3.0318 -1 0 3 2 30.60 43.76 2.9215 -3 0 1 2 30.63 3.72 2.9186 1 2 1 4 30.77 31.23 2.9056 1 1 2 4 31.19 54.68 2.8678 2 1 1 4 31.34 38.26 2.8543 -1 2 2 4 31.75 7.70 2.8185 -2 2 1 4 31.94 86.41 2.8021 -1 1 3 4 32.63 100.00 2.7445 0 2 2 4 33.00 88.38 2.7144 -3 1 1 4 33.01 28.40 2.7132 -2 1 3 4 33.15 95.68 2.7022 2 2 0 4 34.03 8.74 2.6346 -2 2 2 4 34.77 4.70 2.5801 0 1 3 4 35.88 12.08 2.5028 3 1 0 4 37.36 6.58 2.4070 2 0 2 2 37.53 20.74 2.3964 1 2 2 4 37.70 18.87 2.3859 -3 1 3 4 37.88 30.35 2.3751 2 2 1 4 38.37 3.39 2.3461 0 3 1 4 38.48 33.36 2.3394 1 3 0 4 38.52 21.74 2.3374 -1 2 3 4 38.68 44.78 2.3280 -1 3 1 4 39.40 20.96 2.2871 2 1 2 4 39.42 9.03 2.2857 -3 2 1 4 39.70 9.61 2.2705 -2 0 4 2 39.73 5.57 2.2689 3 0 1 2 39.99 2.81 2.2544 -3 2 2 4 40.80 14.41 2.2117 1 1 3 4 40.95 1.07 2.2038 0 2 3 4 41.40 23.86 2.1811 1 3 1 4 41.64 1.27 2.1691 -2 1 4 4 41.92 2.82 2.1550 3 2 0 4 41.94 1.56 2.1539 -1 3 2 4 42.08 10.02 2.1471 -1 1 4 4 42.26 20.17 2.1384 -2 3 1 4 42.96 1.08 2.1055 0 3 2 4 43.53 4.11 2.0790 -3 2 3 4 43.65 12.11 2.0734 -4 1 1 4 43.80 3.92 2.0670 0 0 4 2 44.33 1.16 2.0432 -3 1 4 4 45.04 2.44 2.0127 2 2 2 4 45.04 20.53 2.0127 -4 1 3 4 45.42 3.44 1.9968 4 0 0 2 45.60 6.36 1.9896 0 1 4 4 46.31 13.91 1.9607 1 2 3 4 47.09 12.80 1.9299 3 2 1 4 47.17 4.76 1.9268 4 1 0 4 47.47 1.54 1.9153 -1 2 4 4 48.09 13.35 1.8921 -4 0 4 2 48.22 8.62 1.8872 -4 2 2 4 48.53 9.88 1.8757 -3 3 1 4 48.90 2.61 1.8624 -4 2 1 4 49.06 4.27 1.8569 2 1 3 4 49.53 1.91 1.8405 -3 2 4 4 49.53 1.78 1.8404 3 1 2 4 49.68 11.65 1.8350 0 4 0 2 49.76 33.17 1.8322 -4 1 4 4 49.84 2.97 1.8297 0 3 3 4 50.98 7.71 1.7914 0 4 1 4 51.07 11.14 1.7884 1 4 0 4 51.20 1.38 1.7843 -3 0 5 2 51.23 2.49 1.7833 -1 4 1 4 51.46 2.89 1.7757 -1 0 5 2 51.58 10.03 1.7719 -2 1 5 4 52.07 28.83 1.7564 -3 3 3 4 52.15 9.01 1.7540 4 2 0 4 52.64 1.08 1.7386 -5 0 3 2 52.80 12.08 1.7338 -3 1 5 4 53.06 4.19 1.7259 -1 1 5 4 53.47 2.15 1.7138 -5 1 2 4 53.89 3.58 1.7013 -1 4 2 4 54.51 16.15 1.6833 1 3 3 4 54.57 1.36 1.6818 -4 2 4 4 54.73 4.65 1.6772 0 4 2 4 55.08 4.49 1.6674 2 4 0 4 55.17 13.88 1.6647 -5 1 1 4 55.19 5.97 1.6643 -2 3 4 4 55.21 20.84 1.6637 3 3 1 4 55.67 6.04 1.6511 -2 4 2 4 56.23 11.39 1.6361 -4 3 2 4 56.27 7.66 1.6347 -2 2 5 4 56.37 9.42 1.6322 1 2 4 4 56.60 2.56 1.6262 -4 1 5 4 57.10 21.21 1.6131 0 1 5 4 57.36 3.55 1.6063 -5 1 4 4 57.40 5.65 1.6054 -3 3 4 4 57.42 2.71 1.6047 -3 2 5 4 57.43 5.36 1.6046 3 0 3 2 57.65 7.66 1.5991 4 2 1 4 57.67 7.08 1.5984 -1 2 5 4 57.99 2.53 1.5904 -4 3 3 4 58.11 3.31 1.5874 1 4 2 4 58.45 3.52 1.5789 0 3 4 4 59.19 15.22 1.5609 5 1 0 4 59.50 4.45 1.5537 -2 4 3 4 59.67 3.33 1.5495 -5 2 1 4 59.80 1.81 1.5465 2 1 4 4 60.63 2.25 1.5274 0 4 3 4 61.23 6.25 1.5137 -5 0 5 2 61.39 3.80 1.5101 2 3 3 4 61.51 2.64 1.5076 0 2 5 4 61.76 10.27 1.5020 -5 2 4 4 61.95 1.70 1.4980 1 0 5 2 62.00 3.00 1.4968 -4 3 4 4 62.57 1.11 1.4846 -2 1 6 4 62.67 1.90 1.4824 -3 1 6 4 63.37 5.14 1.4677 1 1 5 4 63.71 5.84 1.4607 -6 0 2 2 64.10 17.65 1.4528 2 2 4 4 64.47 1.30 1.4454 0 5 1 4 64.65 1.39 1.4417 -3 3 5 4 64.78 1.19 1.4391 1 4 3 4 64.86 1.16 1.4376 4 3 1 4 64.88 8.25 1.4371 -1 3 5 4 65.04 4.78 1.4339 4 2 2 4 65.14 1.62 1.4320 -4 1 6 4 65.27 12.77 1.4296 5 1 1 4 65.32 2.04 1.4285 -6 0 4 2 65.41 4.17 1.4268 3 4 1 4 65.72 1.95 1.4209 -1 4 4 4 65.91 3.72 1.4172 -5 3 3 4 66.71 2.78 1.4022 -6 1 4 4 66.76 5.58 1.4012 -5 3 1 4 66.86 3.02 1.3993 -3 2 6 4 66.89 1.46 1.3989 -4 4 1 4 67.00 8.25 1.3968 -1 5 2 4 67.40 10.06 1.3895 -3 4 4 4 67.54 8.11 1.3869 1 2 5 4 68.04 2.92 1.3780 0 0 6 2 68.57 3.49 1.3686 -2 5 2 4 68.73 1.84 1.3658 -5 3 4 4 68.98 1.86 1.3615 -1 2 6 4 69.26 3.94 1.3566 -4 2 6 4 69.38 2.28 1.3546 5 2 1 4 69.59 2.40 1.3510 3 1 4 4 69.86 7.47 1.3464 -5 1 6 4 70.12 4.53 1.3421 4 1 3 4 70.13 3.01 1.3418 3 3 3 4 70.70 1.68 1.3325 -6 1 5 4 70.78 5.60 1.3312 -6 2 4 4 70.78 2.20 1.3312 6 0 0 2 71.39 13.40 1.3213 -1 5 3 4 71.45 1.50 1.3203 3 4 2 4 71.58 1.21 1.3182 2 1 5 4 71.64 6.41 1.3173 -4 4 4 4 71.99 9.10 1.3117 -3 5 1 4 73.03 1.62 1.2957 0 5 3 4 73.20 5.64 1.2930 1 4 4 4 73.59 2.32 1.2872 3 2 4 4 73.70 1.77 1.2855 3 5 0 4 74.12 4.08 1.2792 -3 4 5 4 74.23 1.83 1.2776 1 3 5 4 74.31 1.70 1.2764 4 4 1 4 74.34 1.62 1.2760 -1 4 5 4 74.62 1.57 1.2718 -2 1 7 4 74.67 1.01 1.2711 -5 4 2 4 75.20 1.62 1.2634 -4 1 7 4 75.45 3.64 1.2599 -7 0 3 2 75.86 2.68 1.2542 -6 3 2 4 75.89 1.35 1.2538 -4 3 6 4 76.00 1.05 1.2521 5 3 1 4 76.01 1.02 1.2520 1 1 6 4 76.06 1.45 1.2514 6 2 0 4 76.65 1.85 1.2432 -6 1 6 4 76.75 1.10 1.2418 -7 1 3 4 76.85 1.59 1.2404 1 5 3 4 77.07 1.37 1.2374 5 2 2 4 77.35 3.17 1.2336 -6 3 4 4 77.49 1.01 1.2318 -5 0 7 2 77.63 2.77 1.2299 -1 1 7 4 78.13 4.57 1.2233 0 6 0 2 78.29 2.35 1.2212 -4 5 2 4 79.10 1.07 1.2108 -4 2 7 4 79.22 2.40 1.2092 1 6 0 4 79.23 3.37 1.2090 -7 0 5 2 79.67 3.25 1.2035 4 0 4 2 79.80 1.20 1.2018 -4 5 3 4 80.52 2.36 1.1929 -6 2 6 4 80.62 1.40 1.1917 -7 2 3 4 80.96 6.57 1.1875 4 4 2 4 81.11 4.48 1.1857 -7 1 1 4 81.35 1.04 1.1828 4 5 0 4 82.55 1.50 1.1687 -2 4 6 4 82.77 1.80 1.1660 2 5 3 4 83.13 1.52 1.1619 3 5 2 4 83.31 2.92 1.1599 -4 5 4 4 83.33 2.11 1.1597 2 0 6 2 84.61 1.52 1.1454 -1 4 6 4 84.77 1.12 1.1436 4 2 4 4 84.94 2.37 1.1418 -7 2 1 4 85.01 1.02 1.1410 1 6 2 4 85.69 1.36 1.1336 -3 5 5 4 85.90 1.95 1.1314 -1 5 5 4 86.28 3.30 1.1275 7 1 0 4 86.55 4.31 1.1246 -3 6 2 4 86.88 3.24 1.1212 -6 3 6 4 87.11 2.12 1.1188 -6 -4 1 4 87.84 1.62 1.1114 -1 3 7 4 88.26 1.17 1.1072 -6 2 7 4 88.40 1.37 1.1058 2 2 6 4 88.71 1.56 1.1027 1 0 7 2 88.98 2.69 1.1001 3 4 4 4 89.24 1.96 1.0976 -5 4 6 4 89.48 2.63 1.0953 4 4 3 4 89.97 3.26 1.0906 2 6 2 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.