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gbasp2003

铁虫 (初入文坛)

[求助] [求扫盲] 关于晶体内原子位置编号的问题

文献中的描述,想请问一下Ti5C,O2C这个里面的5C和2C是怎么来的。谢谢了!!
We investigated the adsorption energy of a metal atom
deposited on the stoichiometric TiO2 rutile (110) surface. The
various possible sites of adsorption are shown in SI-Fig. 2. We
find that the most favorable position for adsorption of either
Pt or Au is on the Ti5C–O2C–bri site, depicted in SI-Fig. 2(a). The
calculated adsorption energies for Pt and Au atoms on that
site are 44.38 and 10.90 kcal/mol, respectively. Two other
possible locations are on Ti5C–Ti5C–bri and Ti5C-on-top sites
for each Pt and Au, shown in SI-Fig. 2(b) and 2(c); the calculated
adsorption energies for the Ti5C–Ti5C–bri site are 39.84
and 9.08 kcal/mol, respectively for Pt and Au, whereas
24.80 and 7.29 kcal/mol for the Ti5C-on-top site,
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wzbhit

至尊木虫 (著名写手)

【答案】应助回帖

感谢参与,应助指数 +1
C是Wyckoff position的符号
TiO2 - Rutile的space Group No.136 (P42/mnm)
在这下面网址找到Wyckoff position,然后查看对应的原子坐标
http://www.cryst.ehu.es/cryst/get_wp.html
Regards~
从明天开始坚持吃早饭呀!
2楼2012-05-03 12:07:13
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gbasp2003

铁虫 (初入文坛)

Wyckoff Positions of Group 136 (P42/mnm)

Multiplicity        Wyckoff
letter        Site
symmetry        Coordinates
16        k        1       
(x,y,z)        (-x,-y,z)        (-y+1/2,x+1/2,z+1/2)        (y+1/2,-x+1/2,z+1/2)
(-x+1/2,y+1/2,-z+1/2)        (x+1/2,-y+1/2,-z+1/2)        (y,x,-z)        (-y,-x,-z)
(-x,-y,-z)        (x,y,-z)        (y+1/2,-x+1/2,-z+1/2)        (-y+1/2,x+1/2,-z+1/2)
(x+1/2,-y+1/2,z+1/2)        (-x+1/2,y+1/2,z+1/2)        (-y,-x,z)        (y,x,z)
8        j        ..m       
(x,x,z)        (-x,-x,z)        (-x+1/2,x+1/2,z+1/2)        (x+1/2,-x+1/2,z+1/2)
(-x+1/2,x+1/2,-z+1/2)        (x+1/2,-x+1/2,-z+1/2)        (x,x,-z)        (-x,-x,-z)
8        i        m..       
(x,y,0)        (-x,-y,0)        (-y+1/2,x+1/2,1/2)        (y+1/2,-x+1/2,1/2)
(-x+1/2,y+1/2,1/2)        (x+1/2,-y+1/2,1/2)        (y,x,0)        (-y,-x,0)
8        h        2..       
(0,1/2,z)        (0,1/2,z+1/2)        (1/2,0,-z+1/2)        (1/2,0,-z)
(0,1/2,-z)        (0,1/2,-z+1/2)        (1/2,0,z+1/2)        (1/2,0,z)
4        g        m.2 m       
(x,-x,0)        (-x,x,0)        (x+1/2,x+1/2,1/2)        (-x+1/2,-x+1/2,1/2)
4        f        m.2 m       
(x,x,0)        (-x,-x,0)        (-x+1/2,x+1/2,1/2)        (x+1/2,-x+1/2,1/2)
4        e        2.m m       
(0,0,z)        (1/2,1/2,z+1/2)        (1/2,1/2,-z+1/2)        (0,0,-z)
4        d        -4..       
(0,1/2,1/4)        (0,1/2,3/4)        (1/2,0,1/4)        (1/2,0,3/4)
4        c        2/m..       
(0,1/2,0)        (0,1/2,1/2)        (1/2,0,1/2)        (1/2,0,0)
2        b        m.m m       
(0,0,1/2)        (1/2,1/2,0)
2        a        m.m m       
(0,0,0)        (1/2,1/2,1/2)

楼上的大侠,麻烦你帮我看看,这个是进去查到的数据,没有5C,2C啊,,
3楼2012-05-03 13:49:03
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