Polyakovite-(Ce) Popov V A, Pautov L A, Sokolova E V, Hawthorne F C, McCammon C A, Bazhenova L F The Canadian Mineralogist 39 (2001) 1095-1104 Polyakovite-(Ce), (REE,Ca)4(Mg,Fe)(Cr,Fe)2(Ti,Nb)2Si4O22, a new metamict mineral species from the Ilmen Mountains, Southern Urals, Russia: Mineral discription and crystal chemistry Locality: Ilmen Mountains, Southern Urals, Russia _database_code_amcsd 0005725 CELL PARAMETERS: 13.3980 5.6974 11.0420 90.000 100.539 90.000 SPACE GROUP: C2/m X-RAY WAVELENGTH: 1.541838 Cell Volume: 828.659 Density (g/cm3): 5.008 MAX. ABS. INTENSITY / VOLUME**2: 19.65485629 RIR: 1.278 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 8.14 41.58 10.8557 0 0 1 2 13.44 4.90 6.5860 2 0 0 2 16.33 47.65 5.4279 0 0 2 2 16.96 5.47 5.2292 1 1 0 4 16.98 1.02 5.2230 2 0 1 2 18.29 68.95 4.8508 -1 1 1 4 19.19 1.78 4.6243 -2 0 2 2 19.37 54.29 4.5828 1 1 1 4 22.74 2.11 3.9104 -1 1 2 4 23.06 1.56 3.8567 2 0 2 2 24.60 31.43 3.6186 0 0 3 2 25.61 29.16 3.4778 3 1 0 4 25.74 47.75 3.4608 -3 1 1 4 28.05 100.00 3.1808 3 1 1 4 28.40 76.69 3.1423 -3 1 2 4 28.97 24.20 3.0822 -1 1 3 4 29.03 39.38 3.0759 -4 0 2 2 29.76 52.59 3.0024 4 0 1 2 30.28 2.39 2.9517 2 0 3 2 31.06 28.37 2.8794 1 1 3 4 31.40 70.82 2.8487 0 2 0 2 32.49 6.14 2.7554 0 2 1 4 32.53 59.55 2.7527 3 1 2 4 33.01 71.61 2.7139 0 0 4 2 33.04 86.41 2.7114 -3 1 3 4 33.27 23.01 2.6930 -4 0 3 2 34.30 9.56 2.6146 2 2 0 4 34.34 12.22 2.6115 4 0 2 2 34.70 10.51 2.5850 -2 2 1 4 35.59 38.98 2.5224 0 2 2 4 35.91 13.14 2.5009 2 2 1 4 36.17 1.15 2.4837 -1 1 4 4 37.07 2.80 2.4254 -2 2 2 4 37.13 1.65 2.4211 -5 1 1 4 37.62 3.91 2.3912 5 1 0 4 38.41 13.22 2.3436 3 1 3 4 38.47 3.79 2.3404 1 1 4 4 38.54 1.26 2.3360 -5 1 2 4 38.95 9.18 2.3121 -4 0 4 2 39.03 5.96 2.3079 -3 1 4 4 39.93 1.11 2.2578 5 1 1 4 40.26 12.01 2.2401 4 0 3 2 40.29 13.88 2.2383 0 2 3 4 40.40 8.09 2.2326 -6 0 1 2 41.45 5.21 2.1784 -6 0 2 2 41.76 37.81 2.1632 -4 2 1 4 41.93 24.97 2.1544 4 2 0 4 43.29 12.57 2.0900 -4 2 2 4 43.53 11.76 2.0792 6 0 1 2 43.81 14.64 2.0665 4 2 1 4 43.83 2.16 2.0654 5 1 2 4 43.98 4.57 2.0588 -1 1 5 4 44.17 8.49 2.0506 -6 0 3 2 44.18 4.64 2.0498 2 2 3 4 45.26 21.43 2.0034 3 1 4 4 45.96 25.35 1.9747 -3 1 5 4 46.20 52.68 1.9650 0 2 4 4 46.25 1.60 1.9630 -5 1 4 4 46.37 2.22 1.9582 2 0 5 2 46.40 6.10 1.9570 -4 2 3 4 46.44 11.74 1.9555 1 1 5 4 46.44 15.17 1.9552 -2 2 4 4 47.22 3.95 1.9250 4 2 2 4 48.96 5.15 1.8603 -1 3 1 4 49.42 6.30 1.8441 1 3 1 4 49.76 1.87 1.8324 -2 0 6 2 50.18 13.07 1.8181 2 2 4 4 50.44 1.98 1.8093 0 0 6 2 50.86 5.55 1.7952 -4 2 4 4 50.96 19.71 1.7921 -7 1 2 4 51.12 15.99 1.7868 7 1 0 4 51.93 5.41 1.7609 4 2 3 4 52.04 4.12 1.7572 -6 2 1 4 52.50 3.30 1.7431 3 3 0 4 52.57 5.85 1.7410 6 0 3 2 52.57 5.93 1.7409 -3 3 1 4 52.63 6.33 1.7389 6 2 0 4 52.82 4.30 1.7333 -2 2 5 4 52.85 3.22 1.7324 3 1 5 4 52.91 14.56 1.7304 -6 2 2 4 53.03 3.70 1.7268 0 2 5 4 53.07 1.51 1.7255 -7 1 3 4 53.11 13.25 1.7244 -4 0 6 2 53.60 2.31 1.7097 -3 1 6 4 53.67 8.06 1.7078 -6 0 5 2 53.87 12.83 1.7018 3 3 1 4 54.08 8.39 1.6958 -3 3 2 4 54.41 3.46 1.6862 -1 3 3 4 54.65 16.58 1.6794 6 2 1 4 54.73 10.27 1.6771 4 0 5 2 54.85 14.22 1.6739 -8 0 1 2 54.89 2.18 1.6727 1 1 6 4 55.19 11.49 1.6643 -6 2 3 4 55.26 7.48 1.6624 5 1 4 4 55.26 4.62 1.6623 -8 0 2 2 55.69 4.51 1.6505 1 3 3 4 56.46 2.18 1.6299 -4 2 5 4 56.53 9.83 1.6279 -7 1 4 4 56.62 11.76 1.6256 3 3 2 4 56.95 14.19 1.6169 -3 3 3 4 56.99 9.28 1.6159 7 1 2 4 57.06 1.37 1.6141 -8 0 3 2 57.73 2.49 1.5969 4 2 4 4 57.99 3.59 1.5904 6 2 2 4 58.65 1.21 1.5740 -5 1 6 4 58.77 1.62 1.5712 -6 2 4 4 59.62 7.32 1.5508 0 0 7 2 60.02 1.62 1.5414 -6 0 6 2 60.17 1.03 1.5380 -8 0 4 2 60.62 2.07 1.5276 3 3 3 4 60.63 7.87 1.5273 0 2 6 4 61.06 1.33 1.5176 -3 3 4 4 61.06 6.62 1.5176 3 1 6 4 61.08 3.57 1.5171 -1 1 7 4 61.19 1.02 1.5148 -7 1 5 4 61.80 2.47 1.5012 8 0 2 2 61.88 13.21 1.4995 -3 1 7 4 62.98 2.03 1.4759 4 0 6 2 63.01 3.70 1.4752 -4 2 6 4 63.83 1.92 1.4582 1 1 7 4 64.47 3.37 1.4454 -8 0 5 2 64.47 3.91 1.4453 4 2 5 4 64.58 1.64 1.4432 -8 2 1 4 64.75 1.21 1.4398 -1 3 5 4 64.75 4.04 1.4397 2 2 6 4 65.54 20.39 1.4244 0 4 0 2 65.74 6.07 1.4205 3 3 4 4 65.80 1.56 1.4194 6 0 5 2 66.28 7.59 1.4101 -3 3 5 4 66.44 1.20 1.4073 -9 1 3 4 66.56 2.80 1.4049 8 0 3 2 66.59 3.25 1.4043 -8 2 3 4 66.66 2.61 1.4031 1 3 5 4 66.90 4.17 1.3986 -7 1 6 4 67.24 1.28 1.3923 -6 0 7 2 67.59 5.48 1.3859 7 1 4 4 67.63 4.18 1.3853 8 2 1 4 68.05 1.81 1.3777 0 4 2 4 68.13 3.18 1.3764 6 2 4 4 68.94 1.79 1.3621 0 2 7 4 69.11 2.81 1.3591 -9 1 4 4 69.24 6.45 1.3570 0 0 8 2 69.31 8.01 1.3557 -6 2 6 4 70.31 6.80 1.3389 -7 3 2 4 70.41 1.10 1.3373 -1 1 8 4 70.41 1.28 1.3372 -10 0 1 2 70.44 4.88 1.3367 7 3 0 4 70.97 4.01 1.3281 8 2 2 4 71.14 1.95 1.3254 0 4 3 4 71.62 1.47 1.3176 -10 0 3 2 71.64 1.06 1.3172 10 0 0 2 71.88 1.10 1.3135 3 3 5 4 73.23 4.30 1.2925 -4 4 2 4 73.34 1.55 1.2909 1 1 8 4 73.47 3.95 1.2889 -8 2 5 4 73.61 5.71 1.2869 4 4 1 4 73.92 2.99 1.2822 5 3 4 4 74.07 1.35 1.2799 10 0 1 2 74.72 9.29 1.2704 6 2 5 4 75.02 3.94 1.2661 -7 3 4 4 75.36 10.37 1.2612 0 4 4 4 75.41 3.86 1.2604 7 3 2 4 75.44 1.84 1.2600 8 2 3 4 75.51 2.95 1.2591 -4 4 3 4 76.09 7.13 1.2509 -6 2 7 4 76.12 1.93 1.2505 4 4 2 4 77.99 4.35 1.2251 0 2 8 4 78.71 1.32 1.2157 -4 2 8 4 78.94 1.09 1.2127 -4 4 4 4 78.99 2.89 1.2121 3 3 6 4 79.01 1.20 1.2119 -1 3 7 4 79.12 5.27 1.2105 -10 2 1 4 79.44 4.11 1.2063 3 1 8 4 79.72 5.92 1.2028 -3 3 7 4 79.79 1.56 1.2019 4 4 3 4 79.88 2.18 1.2008 -6 4 1 4 80.40 4.94 1.1944 -3 1 9 4 80.53 4.00 1.1928 4 2 7 4 80.74 1.88 1.1902 -11 1 2 4 80.92 3.64 1.1880 -11 1 1 4 81.23 3.77 1.1842 -7 1 8 4 81.72 1.79 1.1784 -11 1 3 4 82.00 2.30 1.1751 6 4 1 4 82.13 2.83 1.1735 7 1 6 4 82.45 1.79 1.1698 -6 4 3 4 83.87 1.86 1.1536 -11 1 4 4 84.30 1.73 1.1488 -7 3 6 4 84.77 1.13 1.1436 -8 2 7 4 84.79 1.79 1.1434 11 1 1 4 84.94 2.59 1.1418 7 3 4 4 86.08 4.79 1.1295 -10 2 5 4 86.14 3.78 1.1289 10 2 2 4 86.35 1.39 1.1267 -9 3 4 4 86.99 2.87 1.1200 8 0 6 2 87.16 1.58 1.1183 -11 1 5 4 87.63 2.01 1.1135 8 2 5 4 87.91 1.20 1.1107 0 2 9 4 88.08 1.73 1.1090 -10 0 7 2 88.17 1.15 1.1081 10 0 4 2 88.57 1.20 1.1041 5 1 8 4 88.74 1.85 1.1024 6 4 3 4 88.74 1.11 1.1024 -3 5 1 4 89.18 4.37 1.0982 -4 4 6 4 89.62 2.77 1.0938 -6 4 5 4 89.79 2.32 1.0923 3 5 1 4 89.87 1.52 1.0915 -7 1 9 4 89.95 2.08 1.0907 -3 5 2 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.