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[求助]
用蟲友提供的ICSD數(shù)據(jù)在MS里自建晶胞時出現(xiàn)的問題
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| 我用蟲友提供的WO3的ICSD數(shù)據(jù)http://www.gaoyang168.com/bbs/viewthread.php?tid=5996378 在MS中建立六方WO3的原胞(其中有一個O的原子占有率為0.5),在MS里顯示的是W6O18(W與O原子比例1:3),但是在讀取cell文件的時,文件里顯示的是W6O24,原子比例是1:4了,這是為什么呢?請教各位蟲友,如果有建立好的六方WO3的ICSD的MS文件,能不能發(fā)給我,謝謝! |
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六方晶系的WO3,空間群不同的不止一種,我找到了兩種,見附件的cif文件。 *data for ICSD #80634 Coll Code 80634 Rec Date 1997/05/13 Chem Name Tungsten Oxide - H Structured W O3 Sum O3 W1 ANX AX3 D(calc) 6.49 Title Hexagonal tungsten trioxide obtained from peroxo-polytungstate and reversible lithium electro-intercalation into its framework Author(s) Oi, J.;Kishimoto, A.;Kudo, T.;Hiratani, M. Reference Journal of Solid State Chemistry (1992), 96, 13-19 Unit Cell 7.3244(6) 7.3244(6) 7.6628(5) 90. 90. 120. Vol 356.01 Z 6 Space Group P 63/m c m SG Number 193 Cryst Sys hexagonal Pearson hP24 Wyckoff k j g R Value .068 Red Cell P 7.324 7.324 7.662 90 90 120 356.01 Trans Red 1.000 0.000 0.000 / 0.000 1.000 0.000 / 0.000 0.000 1.000 Comments Model with atoms located in more general positions. Total SOF on at least one site differs from unity (SOF < 0.997 resp. SOF > 1.003) The structure has been assigned a PDF number (calculated powder diffraction data): 01-085-2459 Rietveld profile refinement applied X-ray diffraction (powder) At least one temperature factor missing in the paper. Atom # OX SITE x y z SOF H W 1 +6 6 g 0.4721(13) 0 0.25 1. 0 O 1 -2 12 j 0.3745(92) 0.183(11) 0.25 1. 0 O 2 -2 12 k 0.445(19) 0 0.016(27) 0.5 0 *end for ICSD #80634 *data for ICSD #32001 Coll Code 32001 Rec Date 1980/01/01 Chem Name Tungsten Oxide Structured W O3 Sum O3 W1 ANX AX3 D(calc) 6.42 Title Structural study of a new hexagonal form of tungsten trioxide Author(s) Gerand, B.;Novogorocki, G.;Guenot, J.;Figlarz, M. Reference Journal of Solid State Chemistry (1979), 29, 429-434 Unit Cell 7.298(2) 7.298(2) 3.899(2) 90. 90. 120. Vol 179.84 Z 3 Space Group P 6/m m m SG Number 191 Cryst Sys hexagonal Pearson hP12 Wyckoff l g f R Value .055 Red Cell P 3.899 7.298 7.298 120 90 90 179.842 Trans Red 0.000 0.000 1.000 / 1.000 0.000 0.000 / 0.000 1.000 0.000 Comments CELL PARAMETER C=7.798+3, DETERMINED BY ELECTRON DIFFRACTION The structure has been assigned a PDF number (calculated powder diffraction data): 01-075-2187 X-ray diffraction from single crystal Atom # OX SITE x y z SOF H ITF(B) W 1 +6 3 f 0.5 0 0 1. 0 0 O 1 -2 3 g 0.5 0 0.5 1. 0 6.3 O 2 -2 6 l 0.212(6) 0.424 0 1. 0 5.2 Lbl Type Beta11 Beta22 Beta33 Beta12 Beta13 Beta23 W1 W6+ 0.015(4) 0.013(6) 0.057(9) 0.006(6) 0 0 *end for ICSD #32001 |

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