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[求助]
求四方晶型Bi2O2CO3的晶胞参数,以便用ms作晶胞结构图
如下是我自己从FindIt-[ICSD 1]中得到的四方晶型Bi2O2CO3的晶胞参数,做出的超晶胞结构图如图1所示,但文献中报道的是如图2所示的超晶胞结构图,不知道是我的作图方法有误,还是如下我自己作图的晶胞参数有误?请虫子高手们教教我正确的作图方法或赐予我正确的四方晶型Bi2O2CO3的晶胞参数,拜托了,万分感谢!
Chem Name Bismuth Dioxide Carbonate
Structured Bi2 O2 C O3
Sum C1 Bi2 O5
ANX AB2X5
Min Name Bismutite
D(calc) 8.27
Title On the crystal structure of Bi2 O2 C O3 (bismutite) and Ca Bi2 O2 (C
O3)2 (beyerite)
Author(s) Lagercrantz, A.;Sillen, L.G.
Reference Arkiv foer Kemi, Mineralogi och Geologi, A
(1948), 25(2), 1-21
Unit Cell 3.867 3.867 13.686 90. 90. 90.
Vol 204.66
Z 2
Space Group I 4/m m m
SG Number 139
Cryst Sys tetragonal
Pearson tI16
Wyckoff m2 h e2 d b
Red Cell I 3.867 3.867 7.369 105.211 105.211 89.999 102.328
Trans Red 1.000 0.000 0.000 / 0.000 -1.000 0.000 / -0.500 0.500 -0.500
Comments O of CO3 split on 6 different positions
Total SOF on at least one site differs from unity (SOF <
0.997 resp. SOF > 1.003)
Compound with mineral name: Bismutite
The structure has been assigned a PDF number (calculated
powder diffraction data): 01-073-6504
The structure has been assigned a PDF number (experimental
powder diffraction data): 41-1488
X-ray diffraction from single crystal
No R value given in the paper.
At least one temperature factor missing in the paper.
Atom # OX SITE x y z SOF H
Bi 1 +3 4 e 0 0 0.160(3) 1. 0
O 1 -2 4 d 0 0.5 0.25 1. 0
C 1 +4 2 b 0 0 0.5 1. 0
O 2 -2 4 e 0 0 0.591 0.25 0
O 3 -2 16 m 0.114 0.114 0.579 0.125 0
O 4 -2 16 m 0.197 0.197 0.546 0.125 0
O 5 -2 8 h 0.228 0.228 0.5 0.125 0
*end for ICSD #36245
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自画的四方晶型Bi2O2CO3的超晶胞图
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