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zjuer

至尊木虫 (著名写手)

[交流] 【求助】dmol晶格优化,限制条件失效

利用dmol优化超晶胞的晶格参数(仅C轴方向)和原子位置,a,b固定,α、β、gamma都固定,可是优化了10来步以后,发现gamma值突然发生了变化,能量也增加了许多,不知是何缘故,请知道原委的同行多多指教。随便问一下,如何通过编辑输入文件固定晶胞的某些参数,如角度、长度等谢谢。

[ Last edited by freshgirl on 2009-6-26 at 16:18 ]
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acridine

木虫 (正式写手)

★ ★
zzgyb(金币+2,VIP+0):谢谢你的参与,欢迎再次光临计算模拟版!
多看看帮助文件吧
DMol3: Supports atom positions fixed in Cartesian space, and partial constraints on the x, y, or z components of Cartesian atom positions, but ignores constraints on fractional positions and lattice parameters. Additionally, DMol3 supports fixed interatomic distances, angles, and torsions in nonperiodic structures.
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