24小时热门版块排行榜    

查看: 1932  |  回复: 12
当前只显示满足指定条件的回帖,点击这里查看本话题的所有回帖

djh434325996

木虫 (小有名气)

[求助] (2X2X2的f.u.)pnma对称性40-atoms超包POSCAR怎么建? 已有1人参与

如题想建一个40颗原子pnma对称性的超包(2x2x2), 楼主怎么也建不出来,有没有人建过这样的POSCAR?
回复此楼
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

djh434325996

木虫 (小有名气)

引用回帖:
10楼: Originally posted by xhzha at 2015-06-04 14:43:45
格式转换可通过MS和VESTA俩个软件实现格式转换,共同的格式是有.cell,.cif格式。用MS扩胞后,导出超胞.cif格式,用vesta打开,再导出.vasp格式,及POSCAR格式。关于sqrt(2)超胞你可以在更大的超胞上裁取,保证裁取的 ...

我也尝试过您说的方法,就是两端的周期性保证不了。有什么窍门,或者技巧吗,亲?
12楼2015-06-04 16:28:08
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
查看全部 13 个回答

hakuna

木虫 (知名作家)

知道对称性,还需要知道原子的位置坐标才可以
2楼2015-06-03 18:08:08
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

djh434325996

木虫 (小有名气)

引用回帖:
2楼: Originally posted by hakuna at 2015-06-03 18:08:08
知道对称性,还需要知道原子的位置坐标才可以

pnma对称性最小原包是20颗原子,如下:
Pnma
   1.00000000000000
     5.2182765644714983    0.0000000000000000    0.0000000000000000
     0.0000000000000000    7.3366593204441619    0.0000000000000000
     0.0000000000000000    0.0000000000000000    5.1730459731415745
   Ca   Mn   O
     4     4    12
Direct
  0.9580561300414441  0.2500000000000000  0.0080950960542203
  0.4580561300414512  0.2500000000000000  0.4919049039457797
  0.0419438699585488  0.7500000000000000  0.9919049039457797
  0.5419438699585559  0.7500000000000000  0.5080950960542203
  0.0000000000000000  0.0000000000000000  0.5000000000000000
  0.5000000000000000  0.0000000000000000  0.0000000000000000
  0.5000000000000000  0.5000000000000000  0.0000000000000000
  0.0000000000000000  0.5000000000000000  0.5000000000000000
  0.0116619257227482  0.2500000000000000  0.5709060220497302
  0.9883380742772446  0.7500000000000000  0.4290939779502699
  0.4883380742772518  0.7500000000000000  0.0709060220497301
  0.5116619257227554  0.2500000000000000  0.9290939779502698
  0.7103225551332045  0.0367494147100988  0.2907770335430887
  0.2896774448667953  0.9632505852899013  0.7092229664569114
  0.2103225551332047  0.4632505852899012  0.2092229664569113
  0.7896774448667955  0.5367494147100987  0.7907770335430886
  0.2896774448667953  0.5367494147100987  0.7092229664569114
  0.7103225551332045  0.4632505852899012  0.2907770335430887
  0.7896774448667955  0.9632505852899013  0.7907770335430886
  0.2103225551332047  0.0367494147100988  0.2092229664569113
3楼2015-06-03 19:17:21
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖

hakuna

木虫 (知名作家)

引用回帖:
3楼: Originally posted by djh434325996 at 2015-06-03 19:17:21
pnma对称性最小原包是20颗原子,如下:
Pnma
   1.00000000000000
     5.2182765644714983    0.0000000000000000    0.0000000000000000
     0.0000000000000000    7.3366593204441619    0.0000000000000 ...

弄到MS里,定义好空间群,输入坐标,先构造出晶胞,在扩展一下就可以了,完事儿后,生成个cell文件,再把坐标读出来。如果不嫌麻烦,自己写个小程序转换一下也行
4楼2015-06-03 19:26:09
已阅   回复此楼   关注TA 给TA发消息 送TA红花 TA的回帖
信息提示
请填处理意见