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【答案】应助回帖
★ ★ ★ ★ ★ 感谢参与,应助指数 +1 cixindegu: 金币+5, ★★★★★最佳答案, 非常感谢哈~~~~~~ 2013-07-25 12:48:29
*data for ICSD #245730
Coll Code 245730
Rec Date 2008/08/01
Chem Name Strontium Tecto-dialumodisilicate
Structured Sr (Al2 Si2 O8)
Sum Al2 O8 Si2 Sr1
ANX AB2C2X8
D(calc) 2.93
Title Resolving the aluminium ordering in alumosilicates by a combined
experimental/theoretical study of 27Al electric field gradients
Author(s) Rocquefelte, X.;Clabau, F.;Paris, M.;Deniard, P.;le Mercier,
T.;Jobic, S.;Whangbo Myunghwan
Reference Inorganic Chemistry
(2007), 46(14), 5456-5458
Unit Cell 14.4075 13.0811 8.6368 90 115.05 90
Vol 1474.63
Z 8
Space Group I 1 2/c 1
SG Number 15
Cryst Sys monoclinic
Pearson mS104
Wyckoff f13
Red Cell I 8.636 9.326 9.326 89.064 82.184 82.184 737.317
Trans Red 0.000 0.000 -1.000 / -0.500 -0.500 -0.500 / -0.500 0.500 -0.500
Comments Optimized ordered structure shows too short Sr-Sr distances
of about 1,019A
Electron structure calculation Geometry optimizations using
the VASP and WIEN2k code
NMR spectroscopy data given 27Al and 29Si
Rietveld profile refinement applied
Structure type : Celsian
X-ray diffraction (powder)
No R value given in the paper.
At least one temperature factor missing in the paper.
Atom # OX SITE x y z SOF H
Sr 1 +2 8 f 0.4846 0.2509 0.6849 1. 0
Si 1 +4 8 f 0.2538 0.9241 0.3577 1. 0
Al 1 +3 8 f 0.2495 0.9271 0.1328 1. 0
Al 2 +3 8 f 0.4388 0.1286 0.42 1. 0
Si 2 +4 8 f 0.4297 0.3627 0.4215 1. 0
O 1 -2 8 f 0.2538 0.8778 0.2496 1. 0
O 2 -2 8 f 0.3335 0.2492 0.394 1. 0
O 3 -2 8 f 0.9474 0.1258 0.1413 1. 0
O 4 -2 8 f 0.0739 0.873 0.3545 1. 0
O 5 -2 8 f 0.2398 0.06 0.1192 1. 0
O 6 -2 8 f 0.2531 0.0485 0.3662 1. 0
O 7 -2 8 f 0.5514 0.3679 0.5468 1. 0
O 8 -2 8 f 0.5613 0.1231 0.5548 1. 0
*end for ICSD #245730 |
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