Dy2Si2O7 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 0003422 CELL PARAMETERS: 6.5971 6.6504 18.0582 83.791 88.653 88.498 SPACE GROUP: P-1 X-RAY WAVELENGTH: 1.541838 Cell Volume: 787.185 Density (g/cm3): 6.241 MAX. ABS. INTENSITY / VOLUME**2: 44.25480605 RIR: 2.309 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 4.92 1.05 17.9484 0 0 1 2 9.86 1.89 8.9742 0 0 2 2 13.40 12.15 6.6095 0 1 0 2 13.43 5.18 6.5934 1 0 0 2 13.77 10.83 6.4308 0 1 1 2 14.21 8.60 6.2311 1 0 1 2 14.77 3.91 5.9966 0 -1 1 2 14.81 1.19 5.9828 0 0 3 2 15.77 2.08 5.6184 0 1 2 2 16.52 14.82 5.3670 1 0 2 2 16.85 1.18 5.2615 -1 0 2 2 17.50 1.38 5.0679 0 -1 2 2 18.78 2.40 4.7245 1 1 0 2 18.91 1.08 4.6939 0 1 3 2 19.24 1.85 4.6133 -1 1 0 2 19.58 2.11 4.5348 -1 1 1 2 19.79 2.21 4.4871 0 0 4 2 19.83 25.45 4.4772 1 0 3 2 20.16 29.11 4.4042 1 -1 1 2 20.25 19.75 4.3855 -1 0 3 2 20.42 77.50 4.3484 1 1 2 2 21.11 28.95 4.2078 -1 1 2 2 24.22 3.69 3.6742 -1 0 4 2 24.80 1.39 3.5897 0 0 5 2 25.07 2.66 3.5526 -1 -1 3 2 25.08 1.44 3.5508 1 -1 3 2 26.10 7.79 3.4138 1 1 4 2 26.90 30.44 3.3143 0 2 1 2 26.96 13.03 3.3073 0 1 5 2 26.98 5.69 3.3048 0 2 0 2 27.05 2.31 3.2967 2 0 0 2 27.40 5.27 3.2545 2 0 1 2 27.61 2.24 3.2305 -2 0 1 2 27.97 3.09 3.1896 0 -2 1 2 28.05 2.98 3.1806 1 0 5 2 28.58 13.72 3.1234 1 -1 4 2 28.65 8.96 3.1156 2 0 2 2 28.67 25.42 3.1139 -1 -1 4 2 29.05 11.14 3.0739 -2 0 2 2 29.44 2.27 3.0343 0 2 3 2 29.57 2.46 3.0211 0 -1 5 2 29.80 57.22 2.9983 0 -2 2 2 29.83 1.20 2.9947 1 2 1 2 29.84 2.28 2.9937 1 1 5 2 29.87 100.00 2.9914 0 0 6 2 29.95 13.67 2.9830 1 2 0 2 30.55 5.14 2.9266 -1 2 0 2 30.56 14.81 2.9256 1 2 2 2 30.59 17.05 2.9224 -2 1 0 2 30.62 13.27 2.9201 -1 1 5 2 30.69 26.48 2.9131 2 0 3 2 30.76 26.98 2.9070 -2 -1 1 2 30.86 1.41 2.8979 -2 1 1 2 30.99 1.70 2.8856 2 1 2 2 31.15 16.90 2.8712 2 -1 1 2 31.25 13.08 2.8623 -2 0 3 2 31.39 8.45 2.8498 1 -2 1 2 31.86 27.23 2.8092 0 2 4 2 31.93 43.43 2.8030 -2 1 2 2 32.07 12.66 2.7910 1 2 3 2 32.30 32.66 2.7717 -2 -1 2 2 32.33 4.67 2.7694 0 -2 3 2 32.50 3.15 2.7553 2 -1 2 2 32.52 7.57 2.7534 1 -1 5 2 32.63 1.58 2.7446 -1 -2 2 2 32.67 5.19 2.7410 2 1 3 2 33.00 20.96 2.7144 1 -2 2 2 33.14 10.29 2.7031 -1 0 6 2 33.39 3.43 2.6835 2 0 4 2 33.97 4.28 2.6393 1 1 6 2 34.08 4.22 2.6308 -2 0 4 2 34.21 3.94 2.6214 0 -1 6 2 34.53 4.16 2.5976 -2 -1 3 2 34.87 1.35 2.5732 0 2 5 2 35.01 6.08 2.5628 -1 -2 3 2 35.02 10.79 2.5623 2 1 4 2 35.14 19.19 2.5539 -1 2 4 2 35.42 1.41 2.5339 0 -2 4 2 36.78 6.10 2.4433 1 -1 6 2 37.08 2.02 2.4247 1 2 5 2 37.20 5.78 2.4168 2 -1 4 2 37.36 1.27 2.4067 1 0 7 2 37.91 1.18 2.3731 -1 0 7 2 37.93 12.16 2.3720 2 1 5 2 37.96 4.99 2.3705 -1 -2 4 2 38.35 4.00 2.3470 0 2 6 2 38.98 3.06 2.3106 0 -2 5 2 39.15 1.86 2.3011 -1 1 7 2 39.18 1.80 2.2994 -2 1 5 2 40.19 2.49 2.2435 0 0 8 2 40.36 1.25 2.2347 2 -1 5 2 40.36 3.55 2.2347 1 2 6 2 40.36 1.17 2.2345 -2 -2 2 2 40.72 1.66 2.2158 0 3 1 2 40.96 6.98 2.2032 0 3 0 2 41.07 10.11 2.1978 3 0 0 2 41.07 1.98 2.1977 0 1 8 2 41.12 1.78 2.1950 0 3 2 2 41.17 1.00 2.1927 -2 0 6 2 41.31 3.83 2.1857 1 -1 7 2 41.36 2.10 2.1828 -1 -2 5 2 41.50 1.30 2.1761 -3 0 1 2 41.84 2.85 2.1588 0 -3 1 2 42.13 6.94 2.1451 3 0 2 2 42.22 14.09 2.1404 0 2 7 2 42.62 3.54 2.1216 -2 1 6 2 42.70 1.62 2.1174 1 3 1 2 42.86 1.31 2.1098 2 -2 3 2 42.97 7.08 2.1047 1 3 0 2 42.99 1.06 2.1039 -2 2 4 2 43.01 20.02 2.1028 1 1 8 2 43.06 7.24 2.1009 1 3 2 2 43.06 3.28 2.1006 3 1 0 2 43.09 3.82 2.0995 3 1 1 2 43.43 1.18 2.0837 -1 3 1 2 43.57 6.30 2.0770 3 0 3 2 43.62 1.53 2.0748 -1 3 0 2 43.71 4.38 2.0708 -3 1 0 2 43.72 1.35 2.0703 3 1 2 2 43.78 1.59 2.0676 0 3 4 2 43.79 2.31 2.0674 -1 1 8 2 43.84 2.93 2.0649 -1 3 2 2 43.85 1.67 2.0644 -1 -3 1 2 43.94 5.23 2.0606 2 -1 6 2 43.94 3.54 2.0605 -3 1 1 2 44.02 3.87 2.0572 1 3 3 2 44.20 1.48 2.0493 -3 0 3 2 44.30 4.35 2.0447 2 0 7 2 44.78 2.21 2.0241 -3 1 2 2 44.84 1.64 2.0212 -3 -1 2 2 44.86 2.69 2.0205 -1 3 3 2 44.96 3.05 2.0163 3 1 3 2 44.98 1.16 2.0154 -2 -2 4 2 45.15 7.19 2.0080 -1 -2 6 2 45.17 2.35 2.0074 1 -2 6 2 45.25 2.75 2.0039 -2 0 7 2 45.96 1.81 1.9748 0 3 5 2 46.11 1.22 1.9687 0 1 9 2 46.37 1.54 1.9582 -1 -1 8 2 46.38 3.17 1.9577 -3 0 4 2 46.44 1.98 1.9551 -1 3 4 2 47.35 1.99 1.9200 1 0 9 2 47.74 2.73 1.9052 1 -3 3 2 47.87 5.10 1.9001 2 -1 7 2 47.93 2.35 1.8980 -1 0 9 2 48.08 4.91 1.8925 1 2 8 2 48.17 2.98 1.8892 2 -2 5 2 48.37 4.76 1.8816 -2 -1 7 2 48.56 1.17 1.8750 -1 3 5 2 48.61 2.22 1.8730 2 0 8 2 48.62 2.35 1.8728 0 3 6 2 48.69 2.48 1.8702 3 -1 4 2 48.92 1.24 1.8620 2 3 1 2 49.10 2.36 1.8555 3 2 1 2 49.17 1.99 1.8530 2 1 8 2 49.20 9.35 1.8519 2 3 2 2 49.22 3.71 1.8512 1 -2 7 2 49.24 11.98 1.8505 3 2 0 2 49.62 3.61 1.8371 -2 0 8 2 49.83 1.67 1.8301 -1 -3 4 2 49.94 2.66 1.8263 -3 -2 1 2 50.02 6.82 1.8236 -2 -3 1 2 50.04 2.72 1.8228 2 3 3 2 50.16 2.06 1.8187 1 -3 4 2 50.36 13.39 1.8119 -2 3 0 2 50.41 2.18 1.8103 -3 2 0 2 50.46 2.17 1.8087 -3 2 1 2 50.56 19.01 1.8052 -2 1 8 2 50.87 1.38 1.7948 0 0 10 2 50.91 1.89 1.7936 0 -3 5 2 51.05 4.57 1.7891 -3 2 2 2 51.05 3.40 1.7891 2 -3 1 2 51.24 2.59 1.7829 3 -1 5 2 51.34 1.95 1.7797 -1 -1 9 2 51.38 2.19 1.7784 -2 -3 2 2 51.59 2.72 1.7717 -3 -1 5 2 51.65 13.78 1.7698 0 -2 8 2 51.81 1.03 1.7645 3 1 6 2 51.95 2.18 1.7603 3 -2 2 2 51.97 4.62 1.7596 3 2 4 2 52.11 1.35 1.7551 2 -1 8 2 52.15 4.46 1.7538 -3 0 6 2 52.17 1.87 1.7531 -3 2 3 2 52.27 5.73 1.7501 2 -3 2 2 52.40 2.39 1.7461 1 2 9 2 52.70 7.79 1.7368 -2 -1 8 2 52.88 3.81 1.7315 1 1 10 2 53.03 2.75 1.7270 -2 3 4 2 53.18 2.32 1.7223 2 0 9 2 53.24 3.03 1.7204 -2 -3 3 2 53.29 3.62 1.7192 2 3 5 2 53.46 4.38 1.7140 -3 1 6 2 53.49 2.73 1.7130 3 -2 3 2 53.55 1.73 1.7112 2 1 9 2 53.56 2.65 1.7109 1 -2 8 2 53.67 3.95 1.7077 -1 -2 8 2 53.81 3.43 1.7037 -3 2 4 2 53.95 1.36 1.6995 3 2 5 2 54.25 1.63 1.6908 -2 0 9 2 54.74 1.38 1.6769 -3 -1 6 2 54.98 1.11 1.6702 -2 3 5 2 55.15 1.21 1.6654 2 -2 7 2 55.28 1.18 1.6618 0 4 1 2 55.45 2.71 1.6571 0 4 2 2 55.53 7.02 1.6550 3 -2 4 2 55.58 1.33 1.6536 0 2 10 2 55.58 6.85 1.6536 -2 -3 4 2 55.62 1.44 1.6524 0 4 0 2 55.63 1.74 1.6522 2 3 6 2 55.77 4.00 1.6484 4 0 0 2 55.91 2.49 1.6446 4 0 1 2 56.10 2.54 1.6395 1 -1 10 2 56.12 1.49 1.6390 -1 -3 6 2 56.31 3.32 1.6339 1 -3 6 2 56.39 1.24 1.6317 0 0 11 2 56.39 2.28 1.6316 0 -2 9 2 56.40 5.69 1.6315 3 2 6 2 56.47 1.58 1.6295 0 -4 1 2 56.49 3.12 1.6289 -1 -1 10 2 56.56 3.50 1.6273 4 0 2 2 56.59 3.77 1.6264 1 3 8 2 56.63 2.08 1.6253 0 1 11 2 56.75 1.04 1.6222 -3 1 7 2 56.78 3.10 1.6214 1 4 1 2 57.27 1.10 1.6086 4 1 1 2 57.31 5.78 1.6077 0 4 4 2 57.39 11.44 1.6056 -2 3 6 2 57.54 1.28 1.6016 -1 4 1 2 57.61 1.11 1.6000 3 -1 7 2 57.70 3.18 1.5977 4 0 3 2 57.74 3.31 1.5967 -1 4 2 2 57.82 4.00 1.5948 0 -4 2 2 57.91 9.73 1.5923 -1 2 10 2 57.99 1.15 1.5905 -4 1 0 2 58.09 1.19 1.5879 1 1 11 2 58.14 3.35 1.5866 3 0 8 2 58.38 2.16 1.5807 -4 0 3 2 58.41 1.33 1.5800 2 3 7 2 58.88 1.71 1.5684 -1 1 11 2 58.97 1.83 1.5664 0 4 5 2 59.27 2.83 1.5592 3 2 7 2 60.21 5.27 1.5369 -4 0 4 2 60.34 3.47 1.5339 1 3 9 2 60.88 5.12 1.5217 -3 -2 6 2 61.08 1.56 1.5171 0 4 6 2 61.41 2.57 1.5098 1 -1 11 2 61.45 3.26 1.5089 -3 2 7 2 61.59 1.77 1.5059 2 3 8 2 61.84 1.28 1.5004 1 2 11 2 61.88 1.23 1.4994 2 -3 6 2 61.89 3.40 1.4992 0 -4 4 2 62.05 3.97 1.4957 0 0 12 2 62.13 1.19 1.4939 4 1 5 2 62.15 1.74 1.4936 -3 -1 8 2 62.15 1.21 1.4935 -2 -1 10 2 62.20 3.60 1.4924 3 0 9 2 62.35 1.07 1.4893 4 2 0 2 62.36 1.15 1.4891 1 4 6 2 62.46 1.18 1.4870 3 1 9 2 62.49 1.17 1.4863 -4 0 5 2 63.10 1.96 1.4734 2 1 11 2 63.20 1.07 1.4712 0 3 10 2 63.25 1.00 1.4703 -1 -2 10 2 63.33 2.15 1.4685 4 2 3 2 63.63 1.84 1.4624 0 4 7 2 63.75 4.27 1.4598 -4 2 1 2 63.88 1.15 1.4572 1 -4 4 2 63.91 5.40 1.4565 4 0 6 2 64.06 1.84 1.4535 -4 -2 2 2 64.13 3.09 1.4521 -1 0 12 2 64.29 1.37 1.4489 -4 2 2 2 64.33 1.20 1.4480 -3 -2 7 2 64.60 1.78 1.4428 4 2 4 2 64.81 1.10 1.4386 -3 2 8 2 64.85 1.07 1.4378 1 4 7 2 65.06 2.03 1.4336 -2 -3 7 2 65.31 2.82 1.4288 2 -3 7 2 65.61 2.92 1.4229 -4 -2 3 2 66.11 1.68 1.4135 -1 -4 5 2 66.49 1.11 1.4061 1 -4 5 2 66.83 1.07 1.3999 4 0 7 2 66.92 2.11 1.3982 1 -1 12 2 67.06 1.24 1.3957 -2 3 9 2 68.80 2.42 1.3646 -1 4 8 2 68.96 1.09 1.3617 -2 -3 8 2 69.10 3.05 1.3594 2 -3 8 2 69.51 1.05 1.3523 1 -4 6 2 70.01 1.07 1.3440 -4 -2 5 2 70.10 1.43 1.3424 3 4 1 2 70.15 2.19 1.3416 3 2 10 2 70.25 2.53 1.3398 4 -2 5 2 70.44 2.11 1.3367 4 3 2 2 71.12 1.31 1.3257 0 2 13 2 71.66 1.75 1.3169 3 4 4 2 71.89 1.23 1.3133 3 -2 9 2 72.56 2.61 1.3028 -3 -4 2 2 72.61 1.75 1.3021 1 5 0 2 72.82 1.93 1.2988 -4 -2 6 2 73.03 1.19 1.2956 -3 4 3 2 73.51 1.03 1.2883 -1 5 3 2 73.62 1.78 1.2866 0 4 10 2 73.68 1.78 1.2858 -4 2 7 2 73.80 2.38 1.2840 5 -1 1 2 73.82 1.00 1.2837 4 0 9 2 74.19 1.33 1.2782 -5 -1 2 2 74.95 1.44 1.2670 1 1 14 2 75.60 1.12 1.2577 -4 0 9 2 75.66 1.13 1.2570 3 -4 3 2 76.25 2.82 1.2487 3 -2 10 2 76.51 2.01 1.2451 1 5 6 2 76.62 1.15 1.2435 2 5 1 2 76.80 1.18 1.2411 -4 2 8 2 76.99 1.26 1.2385 2 5 3 2 77.14 1.41 1.2365 3 4 7 2 77.79 2.01 1.2278 -2 -3 10 2 77.88 1.98 1.2265 2 3 12 2 78.33 1.85 1.2207 -3 1 12 2 78.97 1.26 1.2124 2 4 10 2 79.29 1.53 1.2083 4 -3 5 2 79.36 1.22 1.2075 2 1 14 2 79.74 1.87 1.2026 -2 5 4 2 79.80 1.17 1.2018 3 4 8 2 79.81 2.95 1.2017 -4 0 10 2 79.97 2.66 1.1998 -2 3 12 2 79.99 1.15 1.1995 3 -4 5 2 80.63 1.99 1.1915 2 -5 2 2 81.02 3.42 1.1868 -2 1 14 2 81.06 1.47 1.1863 -2 -5 3 2 81.09 1.02 1.1860 4 2 10 2 81.15 1.34 1.1852 4 4 2 2 81.35 1.00 1.1828 -5 1 6 2 81.69 1.47 1.1787 -5 2 4 2 81.84 1.62 1.1769 1 -5 5 2 82.17 1.23 1.1730 4 1 11 2 83.11 1.32 1.1622 1 -3 12 2 83.61 1.58 1.1565 -4 -2 9 2 83.72 2.47 1.1553 0 -4 10 2 83.82 1.26 1.1541 0 -2 14 2 83.89 1.62 1.1533 -4 4 0 2 84.18 2.09 1.1502 5 -1 7 2 84.63 1.18 1.1451 5 1 8 2 85.28 1.27 1.1381 3 5 4 2 85.39 1.11 1.1369 -1 5 9 2 85.48 1.01 1.1359 -5 -3 1 2 85.58 1.67 1.1348 -1 -2 14 2 85.81 1.67 1.1324 -2 -5 5 2 86.86 1.17 1.1214 -3 -2 12 2 87.06 1.78 1.1193 4 0 12 2 87.26 1.39 1.1172 -4 -4 4 2 87.51 1.11 1.1147 1 1 16 2 87.62 1.23 1.1137 5 3 5 2 88.36 1.24 1.1062 -3 3 12 2 88.36 1.45 1.1062 5 -3 2 2 88.50 1.35 1.1048 0 6 3 2 88.53 1.83 1.1045 -5 -1 8 2 88.91 1.28 1.1007 -3 -4 8 2 89.12 1.79 1.0987 -4 4 6 2 89.73 1.68 1.0929 1 3 15 2 89.78 1.28 1.0924 0 -6 1 2 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.