Arapovite Uvarova Y A, Sokolova E V, Hawthorne F C, Agakhanov A A, Pautov L A The Canadian Mineralogist 42 (2004) 1005-1011 The crystal structure of arapovite, U4+(Ca,Na)2(K1-x_x)[Si8O20],x~0.5, a new mineral species of the steacyite group from the Dara-i-Pioz moraine, Tien-Shan Mountains, Tajikistan Locality: Dara-i-Pioz moraine, Tien-Shan Mountains, Tajikistan _database_code_amcsd 0005955 CELL PARAMETERS: 7.5505 7.5505 14.7104 90.000 90.000 90.000 SPACE GROUP: P4/mcc X-RAY WAVELENGTH: 1.541838 Cell Volume: 838.641 Density (g/cm3): 3.376 MAX. ABS. INTENSITY / VOLUME**2: 29.84954264 RIR: 2.879 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 11.72 32.58 7.5505 1 0 0 4 12.03 54.85 7.3552 0 0 2 2 16.60 22.93 5.3390 1 1 0 4 16.83 100.00 5.2686 1 0 2 8 20.56 11.83 4.3207 1 1 2 8 26.39 64.16 3.3767 2 1 0 8 26.54 73.65 3.3587 2 0 2 8 26.97 62.35 3.3063 1 0 4 8 27.09 16.51 3.2911 2 1 1 16 29.10 20.46 3.0687 2 1 2 16 29.49 8.32 3.0286 1 1 4 8 32.19 1.81 2.7811 2 1 3 16 33.57 17.07 2.6695 2 2 0 4 34.03 67.18 2.6343 2 0 4 8 35.67 15.89 2.5168 3 0 0 4 35.78 8.24 2.5093 2 2 2 8 36.11 13.00 2.4873 2 1 4 16 36.65 1.60 2.4517 0 0 6 2 37.67 4.23 2.3877 3 1 0 8 37.78 3.73 2.3813 3 0 2 8 38.61 4.21 2.3319 1 0 6 8 39.69 4.83 2.2710 3 1 2 16 40.49 2.62 2.2280 1 1 6 8 41.81 24.84 2.1604 2 2 4 8 42.09 5.32 2.1467 3 1 3 16 43.20 3.74 2.0941 3 2 0 8 43.58 4.52 2.0770 3 0 4 8 43.66 3.62 2.0732 3 2 1 16 44.04 11.34 2.0562 2 0 6 8 45.01 19.12 2.0141 3 2 2 16 45.28 8.84 2.0026 3 1 4 16 45.73 16.50 1.9839 2 1 6 16 48.21 13.00 1.8876 4 0 0 4 49.14 2.01 1.8540 3 1 5 16 49.57 8.68 1.8388 0 0 8 2 49.79 2.60 1.8313 4 1 0 8 49.88 6.72 1.8284 4 0 2 8 50.13 14.92 1.8198 3 2 4 16 50.20 2.65 1.8172 4 1 1 16 50.55 13.69 1.8057 2 2 6 8 51.13 1.19 1.7866 1 0 8 8 51.34 1.37 1.7797 3 3 0 4 51.42 10.09 1.7770 4 1 2 16 52.08 7.47 1.7562 3 0 6 8 52.64 2.24 1.7386 1 1 8 8 52.93 1.28 1.7298 3 3 2 8 53.58 1.85 1.7105 3 1 6 16 54.34 11.81 1.6883 4 2 0 8 54.65 3.33 1.6793 4 0 4 8 55.59 1.83 1.6531 2 0 8 8 55.87 14.61 1.6455 4 2 2 16 56.11 12.39 1.6393 4 1 4 16 57.03 15.50 1.6149 2 1 8 16 57.91 1.54 1.5923 3 2 6 16 60.32 5.94 1.5344 4 2 4 16 61.21 6.54 1.5143 2 2 8 8 61.40 4.89 1.5101 4 3 0 8 61.75 1.29 1.5022 4 3 1 16 62.05 3.06 1.4957 4 0 6 8 62.56 5.16 1.4848 3 0 8 8 62.75 1.60 1.4808 5 1 0 8 62.82 2.04 1.4792 4 3 2 16 62.82 1.98 1.4792 5 0 2 8 63.10 3.44 1.4733 5 1 1 16 63.40 2.33 1.4672 4 1 6 16 63.90 1.97 1.4569 3 1 8 16 64.15 1.52 1.4516 5 1 2 16 64.54 2.95 1.4439 1 0 10 8 64.72 1.21 1.4402 3 3 6 8 66.71 5.08 1.4021 5 2 0 8 66.99 3.06 1.3969 4 3 4 16 66.99 4.57 1.3969 5 0 4 8 67.34 4.08 1.3905 4 2 6 16 67.83 1.81 1.3817 3 2 8 16 68.08 2.91 1.3773 5 2 2 16 68.28 1.18 1.3736 5 1 4 16 68.45 6.79 1.3707 2 0 10 8 69.72 2.16 1.3487 3 1 9 16 69.73 1.47 1.3486 2 1 10 16 71.30 2.30 1.3227 5 1 5 16 71.65 5.22 1.3172 4 0 8 8 71.89 2.29 1.3133 4 4 2 8 72.09 1.61 1.3101 5 2 4 16 72.90 1.12 1.2976 4 1 8 16 73.40 1.54 1.2899 5 3 1 16 73.68 1.36 1.2858 5 0 6 8 73.68 4.24 1.2858 4 3 6 16 74.92 1.19 1.2675 5 1 6 16 75.82 4.65 1.2547 4 4 4 8 75.98 1.07 1.2524 3 1 10 16 76.62 4.41 1.2436 4 2 8 16 76.79 2.21 1.2413 6 1 0 8 76.85 1.36 1.2404 6 0 2 8 78.08 1.50 1.2240 6 1 2 16 78.27 2.10 1.2214 5 3 4 16 78.60 1.71 1.2171 5 2 6 16 79.15 2.24 1.2100 1 0 12 8 79.65 5.81 1.2037 3 2 10 16 80.44 1.18 1.1938 6 2 0 8 80.70 3.21 1.1906 6 0 4 8 81.72 3.76 1.1784 6 2 2 16 81.91 1.34 1.1761 6 1 4 16 82.24 1.48 1.1723 4 4 6 8 82.69 3.78 1.1670 4 3 8 16 82.78 1.82 1.1659 2 0 12 8 82.92 1.78 1.1643 5 4 2 16 83.27 1.34 1.1603 4 0 10 8 83.89 1.29 1.1533 5 1 8 16 83.99 1.03 1.1523 2 1 12 16 84.48 2.54 1.1468 4 1 10 16 85.52 5.12 1.1355 6 2 4 16 86.72 2.77 1.1229 5 4 4 16 87.04 2.49 1.1196 6 0 6 8 87.49 2.61 1.1149 5 2 8 16 87.58 1.75 1.1140 2 2 12 8 87.72 2.29 1.1126 6 3 2 16 88.07 3.55 1.1091 4 2 10 16 88.23 2.11 1.1074 6 1 6 16 89.26 2.08 1.0974 5 1 9 16 89.97 1.06 1.0905 3 1 12 16 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.