Tm2Si2O7 Fleet M E, Liu X American Mineralogist 89 (2004) 396-404 A new rare earth disilicate (REE2Si2O7: REE = Dy, Tm, Lu; type-L): Evidence for nonquenchable 10 GPa polymorph with silicon in fivefold trigonal bipyramidal coordination? _database_code_amcsd 0003423 CELL PARAMETERS: 6.5499 6.5876 17.8916 83.828 88.368 88.152 SPACE GROUP: P-1 X-RAY WAVELENGTH: 1.541838 Cell Volume: 766.872 Density (g/cm3): 6.502 MAX. ABS. INTENSITY / VOLUME**2: 48.59958999 RIR: 2.434 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 4.97 1.48 17.7823 0 0 1 2 9.95 2.84 8.8911 0 0 2 2 13.53 12.96 6.5466 0 1 0 2 13.53 6.20 6.5444 1 0 0 2 13.91 11.41 6.3677 0 1 1 2 14.30 8.84 6.1924 1 0 1 2 14.91 4.48 5.9414 0 -1 1 2 14.95 1.05 5.9274 0 0 3 2 15.93 2.22 5.5627 0 1 2 2 16.62 15.77 5.3351 1 0 2 2 17.02 1.44 5.2084 -1 0 2 2 17.66 1.32 5.0221 0 -1 2 2 18.89 2.27 4.6979 1 1 0 2 19.10 1.12 4.6476 0 1 3 2 19.46 1.69 4.5619 -1 1 0 2 19.82 2.14 4.4805 -1 1 1 2 19.96 25.85 4.4494 1 0 3 2 19.97 2.84 4.4456 0 0 4 2 20.37 32.35 4.3596 1 -1 1 2 20.47 20.16 4.3393 -1 0 3 2 20.53 81.64 4.3262 1 1 2 2 21.38 28.50 4.1558 -1 1 2 2 24.49 3.56 3.6351 -1 0 4 2 25.04 1.31 3.5565 0 0 5 2 25.28 2.66 3.5230 -1 -1 3 2 25.30 2.06 3.5198 1 -1 3 2 26.26 7.86 3.3933 1 1 4 2 27.17 29.22 3.2822 0 2 1 2 27.23 12.96 3.2751 0 1 5 2 27.24 6.37 3.2733 0 2 0 2 27.25 2.17 3.2722 2 0 0 2 27.59 5.59 3.2327 2 0 1 2 27.85 2.05 3.2039 -2 0 1 2 28.24 3.57 3.1597 0 -2 1 2 28.26 3.33 3.1584 1 0 5 2 28.83 13.52 3.0971 1 -1 4 2 28.84 8.81 3.0962 2 0 2 2 28.93 26.79 3.0865 -1 -1 4 2 29.32 11.02 3.0461 -2 0 2 2 29.74 2.21 3.0043 0 2 3 2 29.84 2.42 2.9940 0 -1 5 2 30.04 1.09 2.9748 1 2 1 2 30.05 1.73 2.9742 1 1 5 2 30.08 56.10 2.9707 0 -2 2 2 30.15 100.00 2.9637 0 0 6 2 30.17 13.82 2.9625 1 2 0 2 30.76 14.99 2.9063 1 2 2 2 30.88 27.16 2.8957 2 0 3 2 30.90 5.32 2.8937 -1 2 0 2 30.91 16.65 2.8932 -2 1 0 2 30.96 26.37 2.8886 -2 -1 1 2 30.99 13.85 2.8854 -1 1 5 2 31.14 2.05 2.8720 2 1 2 2 31.20 1.59 2.8670 -2 1 1 2 31.45 15.05 2.8444 2 -1 1 2 31.56 13.28 2.8347 -2 0 3 2 31.74 8.68 2.8192 1 -2 1 2 32.18 26.95 2.7814 0 2 4 2 32.29 13.06 2.7724 1 2 3 2 32.30 45.93 2.7716 -2 1 2 2 32.53 34.05 2.7521 -2 -1 2 2 32.63 4.81 2.7442 0 -2 3 2 32.79 3.13 2.7312 2 -1 2 2 32.80 7.85 2.7306 1 -1 5 2 32.83 5.83 2.7282 2 1 3 2 32.88 1.81 2.7238 -1 -2 2 2 33.35 21.32 2.6867 1 -2 2 2 33.51 10.70 2.6746 -1 0 6 2 33.60 3.22 2.6675 2 0 4 2 34.21 4.35 2.6210 1 1 6 2 34.44 3.79 2.6042 -2 0 4 2 34.53 4.22 2.5978 0 -1 6 2 34.81 4.51 2.5773 -2 -1 3 2 35.19 11.62 2.5500 2 1 4 2 35.23 1.36 2.5477 0 2 5 2 35.30 6.21 2.5425 -1 -2 3 2 35.58 20.18 2.5231 -1 2 4 2 35.76 1.52 2.5110 0 -2 4 2 37.10 6.04 2.4232 1 -1 6 2 37.35 2.34 2.4077 1 2 5 2 37.51 6.91 2.3977 2 -1 4 2 37.66 1.26 2.3885 1 0 7 2 37.67 1.23 2.3879 -2 -1 4 2 38.13 12.23 2.3599 2 1 5 2 38.29 5.52 2.3509 -1 -2 4 2 38.33 1.23 2.3483 -1 0 7 2 38.75 4.72 2.3238 0 2 6 2 39.35 3.05 2.2898 0 -2 5 2 39.62 2.06 2.2750 -1 1 7 2 39.67 1.36 2.2722 -2 1 5 2 40.59 3.26 2.2228 0 0 8 2 40.64 1.17 2.2197 -2 -2 2 2 40.67 3.67 2.2184 1 2 6 2 40.69 1.35 2.2175 2 -1 5 2 41.13 1.78 2.1944 0 3 1 2 41.38 7.04 2.1822 0 3 0 2 41.39 11.20 2.1815 3 0 0 2 41.49 1.82 2.1767 0 1 8 2 41.55 1.88 2.1737 0 3 2 2 41.63 1.06 2.1696 -2 0 6 2 41.67 3.99 2.1677 1 -1 7 2 41.73 2.11 2.1643 -1 -2 5 2 41.85 1.64 2.1587 -3 0 1 2 42.26 2.58 2.1385 0 -3 1 2 42.42 6.98 2.1311 3 0 2 2 42.66 14.04 2.1194 0 2 7 2 43.04 1.99 2.1014 1 3 1 2 43.15 3.07 2.0965 -2 1 6 2 43.30 1.31 2.0894 2 -2 3 2 43.32 7.26 2.0886 1 3 0 2 43.33 3.20 2.0881 3 1 0 2 43.34 3.91 2.0879 3 1 1 2 43.36 20.01 2.0870 1 1 8 2 43.40 7.85 2.0851 1 3 2 2 43.86 5.82 2.0641 3 0 3 2 43.94 1.07 2.0604 -1 3 1 2 43.96 1.35 2.0596 3 1 2 2 44.13 1.59 2.0521 -1 3 0 2 44.14 4.60 2.0516 -3 1 0 2 44.22 1.73 2.0484 -1 -3 1 2 44.24 1.55 2.0472 0 3 4 2 44.29 6.15 2.0450 2 -1 6 2 44.31 2.34 2.0445 -1 1 8 2 44.37 3.62 2.0417 1 3 3 2 44.38 2.96 2.0413 -1 3 2 2 44.40 3.65 2.0404 -3 1 1 2 44.50 1.19 2.0358 3 -1 1 2 44.60 4.77 2.0315 2 0 7 2 44.62 1.13 2.0307 -3 0 3 2 45.18 1.80 2.0070 -3 -1 2 2 45.19 3.44 2.0063 3 1 3 2 45.26 1.83 2.0034 -3 1 2 2 45.41 2.67 1.9971 -1 3 3 2 45.57 6.44 1.9906 -1 -2 6 2 45.60 2.47 1.9894 1 -2 6 2 45.77 2.85 1.9826 -2 0 7 2 46.32 1.14 1.9603 1 -3 2 2 46.44 1.63 1.9553 0 3 5 2 46.58 1.48 1.9500 0 1 9 2 46.84 1.54 1.9395 -1 -1 8 2 46.85 2.83 1.9392 -3 0 4 2 47.02 2.19 1.9324 -1 3 4 2 47.75 2.13 1.9048 1 0 9 2 48.25 2.93 1.8861 1 -3 3 2 48.26 4.77 1.8858 2 -1 7 2 48.39 1.11 1.8811 0 -3 4 2 48.46 2.32 1.8784 -1 0 9 2 48.47 4.81 1.8780 1 2 8 2 48.63 2.86 1.8723 2 -2 5 2 48.86 4.38 1.8639 -2 -1 7 2 48.96 2.12 1.8606 2 0 8 2 49.09 2.44 1.8559 3 -1 4 2 49.13 2.40 1.8542 0 3 6 2 49.16 1.38 1.8532 -1 3 5 2 49.23 1.27 1.8507 2 3 1 2 49.37 2.44 1.8460 3 2 1 2 49.49 1.73 1.8418 2 1 8 2 49.51 9.83 1.8409 2 3 2 2 49.53 12.74 1.8404 3 2 0 2 49.69 3.95 1.8349 1 -2 7 2 50.19 3.73 1.8175 -2 0 8 2 50.25 2.88 1.8156 -3 -2 1 2 50.27 1.85 1.8150 -1 -3 4 2 50.36 2.82 1.8121 2 3 3 2 50.37 6.60 1.8116 -2 -3 1 2 50.69 1.92 1.8009 1 -3 4 2 50.98 13.11 1.7914 -2 3 0 2 50.99 1.98 1.7912 -3 2 0 2 51.06 2.72 1.7889 -3 2 1 2 51.20 19.70 1.7842 -2 1 8 2 51.38 1.44 1.7782 0 0 10 2 51.41 2.09 1.7774 0 -3 5 2 51.65 2.73 1.7696 3 -1 5 2 51.66 3.63 1.7694 2 -3 1 2 51.68 4.33 1.7689 -3 2 2 2 51.76 2.36 1.7663 -2 -3 2 2 51.87 1.95 1.7626 -1 -1 9 2 52.06 2.60 1.7566 -3 -1 5 2 52.15 13.68 1.7540 0 -2 8 2 52.23 4.08 1.7515 3 2 4 2 52.24 1.00 1.7509 -2 3 3 2 52.49 2.25 1.7432 3 -2 2 2 52.54 1.23 1.7418 2 -1 8 2 52.72 4.95 1.7361 -3 0 6 2 52.83 2.08 1.7328 -3 2 3 2 52.85 2.46 1.7324 1 2 9 2 52.88 5.79 1.7315 2 -3 2 2 53.25 7.93 1.7201 -2 -1 8 2 53.31 1.04 1.7185 -3 -2 3 2 53.33 4.26 1.7178 1 1 10 2 53.58 2.38 1.7105 2 0 9 2 53.63 3.75 1.7090 2 3 5 2 53.66 3.33 1.7082 -2 -3 3 2 53.74 2.55 1.7058 -2 3 4 2 53.92 1.86 1.7004 2 1 9 2 54.04 2.96 1.6970 3 -2 3 2 54.07 2.74 1.6959 1 -2 8 2 54.12 4.36 1.6946 -3 1 6 2 54.20 4.29 1.6924 -1 -2 8 2 54.23 1.31 1.6916 3 2 5 2 54.51 3.45 1.6835 -3 2 4 2 54.88 1.57 1.6729 -2 0 9 2 55.27 1.49 1.6621 -3 -1 6 2 55.66 1.24 1.6512 2 -2 7 2 55.72 1.18 1.6496 -2 3 5 2 55.86 1.41 1.6459 0 4 1 2 56.00 1.66 1.6422 2 3 6 2 56.03 7.01 1.6413 -2 -3 4 2 56.04 2.92 1.6411 0 4 2 2 56.08 7.12 1.6401 3 -2 4 2 56.17 1.38 1.6375 0 2 10 2 56.20 1.65 1.6366 0 4 0 2 56.22 3.58 1.6361 4 0 0 2 56.34 2.67 1.6330 4 0 1 2 56.61 2.33 1.6258 1 -1 10 2 56.64 1.70 1.6251 -1 -3 6 2 56.69 6.34 1.6237 3 2 6 2 56.89 3.60 1.6186 1 -3 6 2 56.95 2.32 1.6169 0 -2 9 2 56.96 1.28 1.6166 0 0 11 2 56.97 3.87 1.6163 4 0 2 2 57.06 1.65 1.6141 0 -4 1 2 57.09 4.17 1.6134 1 3 8 2 57.09 3.24 1.6133 -1 -1 10 2 57.22 2.11 1.6099 0 1 11 2 57.28 3.02 1.6083 1 4 1 2 57.46 1.22 1.6038 -3 1 7 2 57.64 1.46 1.5992 4 1 1 2 57.92 1.20 1.5923 -2 -1 9 2 57.93 6.12 1.5919 0 4 4 2 58.06 1.34 1.5885 3 -1 7 2 58.11 3.70 1.5874 4 0 3 2 58.18 11.35 1.5858 -2 3 6 2 58.24 1.39 1.5843 -1 4 1 2 58.41 4.12 1.5799 0 -4 2 2 58.44 3.41 1.5791 -1 4 2 2 58.53 3.69 1.5769 3 0 8 2 58.55 1.16 1.5764 -4 1 0 2 58.61 1.07 1.5752 1 1 11 2 58.63 9.89 1.5746 -1 2 10 2 58.81 1.41 1.5702 2 3 7 2 58.94 2.43 1.5670 -4 0 3 2 59.58 1.73 1.5517 -1 1 11 2 59.59 3.17 1.5514 3 2 7 2 59.61 1.75 1.5509 0 4 5 2 60.82 5.91 1.5230 -4 0 4 2 60.89 3.59 1.5214 1 3 9 2 61.42 5.44 1.5095 -3 -2 6 2 61.76 1.66 1.5021 0 4 6 2 61.98 2.63 1.4972 1 -1 11 2 62.02 1.96 1.4963 2 3 8 2 62.07 1.35 1.4954 -2 -3 6 2 62.29 3.71 1.4906 -3 2 7 2 62.40 1.53 1.4882 1 2 11 2 62.49 1.28 1.4863 4 1 5 2 62.53 3.93 1.4853 0 -4 4 2 62.53 1.30 1.4853 2 -3 6 2 62.64 3.71 1.4831 3 0 9 2 62.70 4.02 1.4819 0 0 12 2 62.74 1.40 1.4810 4 2 0 2 62.80 1.71 1.4796 -3 -1 8 2 62.84 1.50 1.4789 -2 -1 10 2 62.85 1.38 1.4787 3 1 9 2 62.93 1.02 1.4769 1 4 6 2 63.15 1.30 1.4724 -4 0 5 2 63.55 1.00 1.4641 2 0 11 2 63.58 2.22 1.4634 2 1 11 2 63.67 2.24 1.4614 4 2 3 2 63.90 1.14 1.4568 -1 -2 10 2 63.91 1.17 1.4567 0 3 10 2 64.08 1.09 1.4532 2 4 4 2 64.34 2.05 1.4480 0 4 7 2 64.34 4.87 1.4478 4 0 6 2 64.50 4.26 1.4447 -4 2 1 2 64.52 1.58 1.4443 -4 -2 2 2 64.59 1.14 1.4428 1 -4 4 2 64.86 3.19 1.4375 -1 0 12 2 64.94 1.39 1.4360 -3 -2 7 2 64.94 1.62 1.4360 4 2 4 2 65.07 1.47 1.4335 -4 2 2 2 65.45 1.07 1.4260 1 4 7 2 65.67 1.98 1.4218 -2 -3 7 2 65.70 1.06 1.4211 -3 2 8 2 65.99 2.99 1.4156 2 -3 7 2 66.11 2.73 1.4134 -4 -2 3 2 66.74 1.48 1.4015 -1 -4 5 2 67.23 1.25 1.3925 1 -4 5 2 67.28 1.09 1.3915 4 0 7 2 67.57 2.21 1.3864 1 -1 12 2 67.99 1.51 1.3787 -2 3 9 2 69.63 1.17 1.3503 -2 -3 8 2 69.70 2.37 1.3492 -1 4 8 2 69.82 3.28 1.3471 2 -3 8 2 70.28 1.17 1.3394 1 -4 6 2 70.58 1.51 1.3345 3 4 1 2 70.60 2.05 1.3341 3 2 10 2 70.61 1.31 1.3339 -4 -2 5 2 70.85 2.22 1.3300 4 3 2 2 70.94 2.60 1.3285 4 -2 5 2 71.91 1.36 1.3129 0 2 13 2 72.13 1.95 1.3096 3 4 4 2 72.56 1.26 1.3028 3 -2 9 2 73.11 2.82 1.2943 -3 -4 2 2 73.29 1.05 1.2916 -4 3 1 2 73.32 1.85 1.2912 1 5 0 2 73.49 2.17 1.2887 -4 -2 6 2 74.06 1.22 1.2801 -3 4 3 2 74.34 1.41 1.2760 4 0 9 2 74.45 1.05 1.2743 -1 5 3 2 74.48 1.93 1.2739 0 4 10 2 74.52 2.48 1.2734 5 -1 1 2 74.70 1.64 1.2707 -4 2 7 2 74.81 1.57 1.2692 -5 -1 2 2 75.34 1.11 1.2615 -2 4 8 2 75.57 1.11 1.2582 -1 -5 2 2 75.70 1.44 1.2565 1 1 14 2 76.53 1.16 1.2448 -4 0 9 2 76.61 1.27 1.2437 3 -4 3 2 76.62 1.05 1.2436 -4 -3 4 2 76.77 1.07 1.2415 -3 4 5 2 76.97 2.99 1.2388 3 -2 10 2 77.28 2.21 1.2346 1 5 6 2 77.29 1.32 1.2345 2 5 1 2 77.65 1.20 1.2296 2 5 3 2 77.66 1.42 1.2295 3 4 7 2 77.89 1.19 1.2265 -4 2 8 2 78.54 1.92 1.2179 2 3 12 2 78.60 1.94 1.2171 -2 -3 10 2 79.02 1.03 1.2117 -3 0 12 2 79.40 1.73 1.2069 -3 1 12 2 79.64 1.38 1.2038 2 4 10 2 80.06 1.15 1.1986 2 1 14 2 80.19 1.71 1.1970 4 -3 5 2 80.36 1.09 1.1949 3 4 8 2 80.82 3.15 1.1892 -4 0 10 2 80.87 1.91 1.1886 -2 5 4 2 80.96 1.04 1.1875 3 -4 5 2 81.12 2.70 1.1856 -2 3 12 2 81.14 1.07 1.1854 4 3 8 2 81.67 1.42 1.1789 4 4 2 2 81.69 2.19 1.1788 2 -5 2 2 81.82 1.33 1.1772 -2 -5 3 2 82.11 3.51 1.1738 -2 1 14 2 82.73 1.27 1.1665 4 1 11 2 82.76 1.40 1.1662 -5 2 4 2 82.83 1.88 1.1654 1 -5 5 2 84.02 1.50 1.1519 1 -3 12 2 84.50 1.45 1.1466 -4 -2 9 2 84.65 2.80 1.1449 0 -4 10 2 84.76 1.22 1.1437 0 -2 14 2 84.81 1.12 1.1432 3 2 13 2 84.87 1.06 1.1426 1 3 14 2 84.90 2.34 1.1422 5 -1 7 2 85.06 1.79 1.1405 -4 4 0 2 85.18 1.10 1.1391 5 1 8 2 85.93 1.34 1.1311 3 5 4 2 86.09 1.08 1.1294 -5 -3 1 2 86.58 1.24 1.1243 -1 5 9 2 86.58 1.95 1.1243 -1 -2 14 2 86.66 1.87 1.1235 -2 -5 5 2 87.75 1.65 1.1123 4 0 12 2 87.88 1.22 1.1110 -3 -2 12 2 87.99 1.47 1.1099 -4 -4 4 2 88.13 1.40 1.1084 5 3 5 2 88.23 1.01 1.1075 -3 2 13 2 88.46 1.29 1.1052 1 1 16 2 89.02 1.23 1.0997 -2 -3 12 2 89.47 1.60 1.0953 5 -3 2 2 89.54 2.07 1.0946 -5 -1 8 2 89.60 1.51 1.0941 0 6 3 2 89.74 1.40 1.0927 -3 3 12 2 89.81 1.34 1.0921 -3 -4 8 2 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.