K2 Nb2 O14 Si4 Crosnier M, Guyomard D, Verbaere A, Piffard Y, Tournoux M Journal of Solid State Chemistry 98 (1992) 128-132 The potassium niobyl cyclotetrasilicate K2(NbO)2Si4O12 _cod_database_code 1000339 _database_code_amcsd 0013735 CELL PARAMETERS: 8.7404 8.7404 8.1360 90.000 90.000 90.000 SPACE GROUP: P4bm X-RAY WAVELENGTH: 1.541838 Cell Volume: 621.546 Density (g/cm3): 3.207 MAX. ABS. INTENSITY / VOLUME**2: 15.09235071 RIR: 1.532 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 10.87 4.05 8.1360 0 0 1 1 14.33 84.68 6.1804 1 1 0 4 18.02 4.10 4.9215 1 1 1 4 20.32 92.33 4.3702 2 0 0 4 21.85 92.73 4.0680 0 0 2 1 22.75 31.33 3.9088 2 1 0 8 23.10 8.96 3.8500 2 0 1 4 25.28 64.61 3.5233 2 1 1 8 26.23 53.99 3.3980 1 1 2 4 28.89 48.98 3.0902 2 2 0 4 30.01 86.27 2.9776 2 0 2 4 30.96 1.41 2.8888 2 2 1 4 31.75 57.46 2.8185 2 1 2 8 32.39 100.00 2.7640 3 1 0 8 33.03 2.72 2.7120 0 0 3 1 36.17 2.72 2.4834 1 1 3 4 36.52 12.46 2.4607 2 2 2 4 37.09 2.52 2.4242 3 2 0 8 38.76 3.78 2.3232 3 2 1 8 39.09 2.89 2.3044 2 0 3 4 39.41 17.63 2.2862 3 1 2 8 41.32 3.84 2.1851 4 0 0 4 42.65 14.83 2.1199 4 1 0 8 42.85 2.03 2.1103 4 0 1 4 43.46 1.59 2.0824 3 2 2 8 44.15 5.87 2.0514 4 1 1 8 44.55 30.20 2.0340 0 0 4 1 45.41 1.04 1.9971 3 3 1 4 46.46 44.21 1.9544 4 2 0 8 46.94 6.33 1.9358 3 1 3 8 47.03 14.76 1.9321 1 1 4 4 47.22 13.25 1.9250 4 0 2 4 49.42 14.06 1.8441 2 0 4 4 49.60 11.64 1.8379 3 3 2 4 50.50 4.68 1.8074 3 2 3 8 51.90 32.22 1.7616 4 2 2 8 53.45 25.01 1.7141 5 1 0 8 53.88 3.46 1.7015 4 0 3 4 53.97 14.45 1.6990 2 2 4 4 54.72 1.93 1.6773 5 1 1 8 56.06 2.64 1.6405 3 3 3 4 56.14 25.45 1.6382 3 1 4 8 57.94 2.97 1.5917 5 2 1 8 58.42 24.40 1.5796 5 1 2 8 59.86 14.99 1.5451 4 4 0 4 61.51 2.82 1.5075 5 2 2 8 61.75 6.93 1.5022 2 1 5 8 61.90 8.11 1.4990 5 3 0 8 62.37 6.46 1.4888 4 0 4 4 63.06 2.71 1.4742 5 3 1 8 63.37 5.34 1.4677 4 1 4 8 63.90 5.20 1.4567 6 0 0 4 64.37 2.81 1.4474 3 3 4 4 64.51 9.26 1.4444 4 4 2 4 64.89 2.96 1.4369 6 1 0 8 66.33 20.95 1.4093 4 2 4 8 66.47 3.21 1.4065 5 3 2 8 66.70 1.16 1.4022 3 1 5 8 67.81 8.42 1.3820 6 2 0 8 68.40 1.31 1.3715 6 0 2 4 69.59 3.59 1.3511 3 2 5 8 71.19 5.32 1.3245 1 1 6 4 72.05 11.11 1.3107 5 1 4 8 72.19 16.35 1.3085 6 2 2 8 72.41 2.48 1.3051 4 0 5 4 72.55 2.65 1.3029 6 3 0 8 73.06 5.24 1.2951 2 0 6 4 73.13 1.51 1.2941 5 4 2 8 73.35 1.50 1.2908 4 1 5 8 74.77 1.18 1.2697 6 1 3 8 76.76 3.01 1.2417 2 2 6 4 76.82 2.17 1.2408 6 3 2 8 77.60 6.25 1.2304 4 4 4 4 78.58 5.62 1.2174 3 1 6 8 78.99 3.91 1.2121 6 4 0 8 79.42 9.70 1.2067 5 3 4 8 79.90 1.86 1.2006 7 2 0 8 81.22 4.76 1.1843 6 0 4 4 81.30 1.73 1.1834 3 2 6 8 81.36 1.39 1.1827 7 1 2 8 81.36 1.02 1.1827 5 5 2 4 81.57 1.21 1.1801 5 1 5 8 83.16 5.50 1.1616 6 4 2 8 84.00 4.88 1.1522 4 0 6 4 84.27 2.33 1.1491 5 2 5 8 84.40 5.97 1.1477 7 3 0 8 84.82 6.98 1.1431 6 2 4 8 85.79 3.83 1.1327 3 3 6 4 86.95 1.09 1.1205 4 4 5 4 87.57 5.39 1.1141 4 2 6 8 88.52 5.72 1.1046 7 3 2 8 88.74 2.03 1.1025 5 3 5 8 89.21 1.53 1.0978 7 2 3 8 89.76 2.41 1.0926 8 0 0 4 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.