Belkovite Choisnet J, Nguyen N, Groult D, Raveau B Materials Research Bulletin 11 (1976) 887-894 De nouveaux oxydes a reseau forme d'octahedres NbO6 (TaO6) et de groupes Si2O7: Les phases A3Ta6Si4O26 (A = Ba,Sr) et K6M6Si4O26 (M = Nb,Ta) Locality: synthetic _database_code_amcsd 0014242 CELL PARAMETERS: 8.9810 8.9810 7.8400 90.000 90.000 120.000 SPACE GROUP: P-62m X-RAY WAVELENGTH: 1.541838 Cell Volume: 547.641 Density (g/cm3): 4.541 MAX. ABS. INTENSITY / VOLUME**2: 49.17040489 RIR: 3.526 RIR based on corundum from Acta Crystallographica A38 (1982) 733-739 2-THETA INTENSITY D-SPACING H K L Multiplicity 11.29 45.43 7.8400 0 0 1 2 11.38 10.48 7.7778 1 0 0 6 16.05 7.10 5.5216 1 0 1 12 19.77 22.10 4.4905 1 1 0 3 22.68 17.88 3.9200 0 0 2 2 22.82 66.15 3.8966 1 1 1 6 22.87 3.32 3.8889 2 0 0 6 25.44 23.55 3.5005 1 0 2 12 25.57 30.18 3.4838 2 0 1 12 30.27 84.34 2.9531 1 1 2 6 30.41 100.00 2.9397 2 1 0 6 32.43 43.45 2.7608 2 0 2 12 32.53 9.90 2.7526 2 1 1 12 34.31 6.53 2.6133 0 0 3 2 34.60 11.59 2.5926 3 0 0 6 38.27 8.11 2.3519 2 1 2 12 39.91 8.98 2.2587 1 1 3 6 40.16 8.62 2.2452 2 2 0 3 41.64 3.12 2.1691 2 0 3 12 41.77 1.68 2.1624 3 0 2 12 41.85 4.76 2.1585 2 2 1 6 41.88 12.99 2.1572 3 1 0 6 43.51 18.86 2.0799 3 1 1 12 46.32 20.69 1.9600 0 0 4 2 46.50 14.50 1.9531 2 1 3 12 46.62 3.66 1.9483 2 2 2 6 46.72 12.47 1.9444 4 0 0 6 47.86 1.14 1.9006 1 0 4 12 48.15 14.02 1.8899 3 1 2 12 49.52 4.01 1.8405 3 0 3 12 50.83 4.18 1.7963 1 1 4 6 51.19 9.31 1.7843 3 2 0 6 52.54 14.82 1.7419 4 0 2 12 52.60 6.44 1.7399 3 2 1 12 54.03 7.68 1.6972 4 1 0 6 55.21 6.86 1.6636 3 1 3 12 55.39 1.48 1.6588 4 1 1 12 56.42 28.13 1.6308 2 1 4 12 56.68 18.45 1.6240 3 2 2 12 59.09 3.07 1.5635 3 0 4 12 59.33 11.79 1.5575 4 1 2 12 59.42 6.95 1.5556 5 0 0 6 60.70 4.58 1.5258 5 0 1 12 62.00 6.82 1.4968 3 3 0 3 62.77 4.12 1.4803 1 1 5 6 62.95 3.11 1.4765 2 2 4 6 63.25 1.43 1.4703 3 3 1 6 63.27 4.81 1.4699 4 2 0 6 64.03 2.84 1.4542 2 0 5 12 64.20 4.50 1.4506 3 1 4 12 64.50 2.77 1.4447 4 2 1 12 66.99 3.93 1.3969 5 1 0 6 67.73 1.09 1.3835 2 1 5 12 67.90 6.36 1.3804 4 0 4 12 68.13 5.98 1.3763 4 2 2 12 70.44 4.07 1.3367 5 0 3 12 71.50 4.87 1.3195 3 2 4 12 71.73 3.85 1.3159 5 1 2 12 72.82 1.56 1.2989 3 3 3 6 73.49 1.43 1.2886 1 0 6 12 73.69 1.26 1.2855 2 2 5 6 73.86 3.01 1.2831 4 1 4 12 73.99 3.14 1.2811 4 2 3 12 74.86 3.47 1.2683 3 1 5 12 75.83 3.53 1.2546 1 1 6 6 76.49 2.17 1.2454 5 2 0 6 76.98 1.62 1.2386 2 0 6 12 77.62 1.00 1.2300 5 2 1 12 78.50 5.84 1.2184 5 0 4 12 80.79 5.67 1.1896 3 3 4 6 81.01 4.46 1.1870 5 2 2 12 81.08 3.07 1.1861 6 1 0 6 81.77 3.16 1.1778 3 2 5 12 81.93 3.32 1.1759 4 2 4 12 82.20 1.42 1.1728 6 1 1 12 84.04 1.83 1.1517 4 1 5 12 85.33 2.64 1.1376 5 1 4 12 85.54 6.23 1.1353 6 1 2 12 86.58 1.32 1.1243 5 2 3 12 87.23 2.94 1.1176 3 1 6 12 ================================================================================ XPOW Copyright 1993 Bob Downs, Ranjini Swaminathan and Kurt Bartelmehs For reference, see Downs et al. (1993) American Mineralogist 78, 1104-1107.