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linhua0402313: ½ð±Ò+2, ¸Ðл»ØÌû½»Á÷£¡Ï£Íû¶ÔÂ¥Ö÷ÓаïÖú 2012-04-20 17:34:50
linhua0402313: ½ð±Ò+2, ¸Ðл»ØÌû½»Á÷£¡Ï£Íû¶ÔÂ¥Ö÷ÓаïÖú 2012-04-20 17:34:50
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ûÕÒµ½£¬ÄãÊÔÊÔÕâ¸ö°É *data for ICSD #53267 Coll Code 53267 Rec Date 2002/04/01 Mod Date 2007/08/01 Chem Name Dibarium Sodium Pentaniobate(V) Structured Ba2 Na (Nb5 O15) Sum Ba2 Na1 Nb5 O15 ANX AB2C5X15 D(calc) 5.39 Title Obtention of good quality Ba2 Na Nb5 O15 crystals: growth, characterization and structure of Nd(3+)-doped single-crystal fibres Author(s) Foulon, G.;Ferriol, M.;Brenier, A.;Boulon, G.;Lecocq, S. Reference European Journal of Solid State Inorganic Chemistry (1996), 33, 673-686 Phase Transition (1992), 38, 127-220 Powder Diffraction (1988), 3, 222-233 Powder Diffraction (1990), 5, 125-130 Unit Cell 12.454(5) 12.454 3.977(2) 90. 90. 90. Vol 616.84 Z 2 Space Group P 4 b m SG Number 100 Cryst Sys tetragonal Pearson tP46 Wyckoff d4 c2 b2 a Red Cell P 3.977 12.454 12.454 90 90 90 616.841 Trans Red 0.000 0.000 1.000 / 1.000 0.000 0.000 / 0.000 1.000 0.000 Comments Averaged orthorhombic structure, cf. 81441 Stable below 110 K (2nd ref., Tomaszewski) Cells of other tungsten bronze ferroelectrics (3rd ref., Zellmer et al.): Ba.8 Sr1.2 Na Nb5 O15: 12.4199, 3.9346, PDF 39-1453; Ba Sr K Nb5 O15: 12.4979, 3.9639, PDF 39-1452; Ba Sr Na.5 K.5 Nb5 O15: 12.4651, 3.9559, PDF 38-1255 Ba Sr Na Nb5 O15: 12.4307, 3.9473, PDF 38-1256; Ba2 Li Ta5 O15: 12.4656, 3.9713, PDF 39-1451; Ba2 Na Nb1.25 Ta3.75 O15: 12.4994, 3.9216, PDF 39-1450 Ba Na1.5 Eu.5 Nb5 O15: 12.4199, 3.8976, PDF 39-1449; Ba Na1.5 La.5 Nb5 O15: 12.4700, 3.9137, PDF 38-1236; Ba Na2 W Nb4 O15: 12.3622, 3.9250, PDF 38-1244 Ba3 La3 Ti5 Nb5 O30: 12.3805, 3.9114, PDF 38-1331; Ba3 Na Gd Nb10 O30: 12.4539, 3.9246, PDF 39-1448; Ba3 Na YNb10 O30: 12.4467, 3.9296, PDF 38-1330; cf. 154401 Pseudotetragonal supercell from 4th ref. (Shimazu et al.): 17.5994(3), 7.9771(9) The structure has been assigned a PDF number (experimental powder diffraction data): 40-1463 Structure type : Ba3Nb5O15(P4bm) X-ray diffraction from single crystal No R value given in the paper. At least one temperature factor is implausible or meaningless but agrees with the value given in the paper. Atom # OX SITE x y z SOF H ITF(U) Ba 1 +2 4 c 0.17231(6) 0.67231 0.1998(2) 1. 0 0.0165(2) Nb 1 +5 8 d 0.29074(6) 0.42642(6) 0.6848(4) 1. 0 0.0046(2) Nb 3 +5 2 b 0 0.5 0.6843(7) 1. 0 0.0055(2) Na 1 +1 2 a 0 0 0.203(3) 1. 0 0.0006(7) O 1 -2 8 d 0.1565(6) 0.5070(7) 0.738(2) 1. 0 0.010(2) O 3 -2 4 c 0.2837(6) 0.7837 0.714(4) 1. 0 0.011(1) O 4 -2 8 d 0.3588(8) 0.5699(8) 0.741(3) 1. 0 0.017(2) O 6 -2 8 d 0.207(1) 0.9225(10) 0.2025(70) 1. 0 0.043(3) O 7 -2 2 b 0 0.5 0.193(12) 1. 0 0.041(4) *end for ICSD #53267 |
2Â¥2012-04-20 16:12:58
gyliu
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3Â¥2012-04-20 16:14:33
socchu
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4Â¥2012-04-20 16:17:06
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socchu: ½ð±Ò+5, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2012-04-21 09:57:01
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socchu: ½ð±Ò+5, ¡ï¡ï¡ï¡ï¡ï×î¼Ñ´ð°¸ 2012-04-21 09:57:01
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5Â¥2012-04-20 16:18:54
socchu
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6Â¥2012-04-21 09:56:47













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