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GaussianÖÐIOPµÄʹÓüò½é [ÎûÎû£¬³­µÄ]

IOpÊÇGaussian³ÌÐòÄÚ²¿µÄһЩ¸ß¼¶Ö¸ÁÓÃÓڱȽÏÉîÈëϸÖµØÉèÖóÌÐòÔËÐеĸ÷ÖÖ²ÎÊý¡£Ôڸ߼¶ÊäÈëÎļþÖУ¬¾­³£¿ÉÒÔ¿´µ½ÈçϸñʽµÄIOPÖ¸Á

IOp(n1/n2=n3)

ÉÏÊöÖ¸ÁîÖУ¬n1±íʾoverlay£¬n2±íʾָÁîÐòºÅ£¬n3±íʾn1/n2Ö¸ÁîµÄÖµ¡£¾ßÌåµÄIOPµÄoverlayºÍÖ¸ÁîºÅ¼°Ëù¶ÔÓ¦ÖµµÄº¬Òå¿ÉÒÔÔÚGaussianÍøÉϵÄIOPs´óÈ«ÉÏÕÒµ½¡£¾ßÌåÍøÖ·Îª£º

http://www.gaussian.com/IOps.htm

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IOp(2/15)
SYMMETRY CONTROL.
-1        Turns on symmetry; same as 0 for molecules but turns on assignment of space group ops. for PBC.
0        Leave symmetry in whatever state it is presently in.
1        Unconditionally turn symmetry off. Note that symm is still called, and will determine the framework group.
        However, the molecule is not oriented.
2        Bring the molecule to a symmetry orientation, but then disable further use of symmetry.
3        Don't even call symm.
4        Call Symm once with loose cutoffs, symmetrize the resulting coordinates, then confirm symmetry with tight cutoffs.
5        Recover the previous symmetry operations from the rwf, and confirm that the new structure has the same symmetry.
6        Same as 5, but get symmetry info from the chk.
00        Default (10)
10        Do re-orientation for PBC.
20        Suppress re-orientation for PBC.
100        Turn on symmetry operations for PBC.

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IOp(2/15)=3

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IOp(5/33=3,3/33=1)

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