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konghuihui99

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[½»Á÷] ¡¾Òѳɹ¦¡¿cifÇóÖú£ºFlack²ÎÊýÎÊÌ⣬Éó¸åÈËÒâ¼û

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Ͷ¸åʱrefinment ²¿·ÖÈçÏ£¬
_refine_ls_structure_factor_coef  Fsqd  
_refine_ls_matrix_type            full
_refine_ls_weighting_scheme       calc  
_refine_ls_weighting_details
'calc w=1/[\s^2^(Fo^2^)+(0.0373P)^2^+0.0000P] where P=(Fo^2^+2Fc^2^)/3'
_atom_sites_solution_primary      direct
_atom_sites_solution_secondary    difmap
_atom_sites_solution_hydrogens    geom
_refine_ls_hydrogen_treatment     constr
_refine_ls_extinction_method      none
_refine_ls_extinction_coef        ?
_refine_ls_abs_structure_details
'Flack H D (1983), Acta Cryst. A39, 876-881'
_chemical_absolute_configuration  syn
_refine_ls_abs_structure_Flack    -10(10)
_refine_ls_number_reflns          1313
_refine_ls_number_parameters      154
_refine_ls_number_restraints      5
_refine_ls_R_factor_all           0.0433
_refine_ls_R_factor_gt            0.0354
_refine_ls_wR_factor_ref          0.0791
_refine_ls_wR_factor_gt           0.0763
_refine_ls_goodness_of_fit_ref    1.031
_refine_ls_restrained_S_all       1.030
_refine_ls_shift/su_max           0.000
_refine_ls_shift/su_mean          0.000


±à¼­»Ø¸´ÈçÏ£¬
According to your Refinement statement, you merged the Friedel pairs before the final refinement. Therefore it would be impossible to have a sensible Flack parameter. Your CIF currently reports a nonsensical Flack parameter of -10 with an uncertainty of 10. Please check your refinement to make sure that the Flack parameter was not included as a free variable. If it was included, set the instructions so that the Flack parameter is not refined, perform the final refinement again, and update the CIF and structure factor list accordingly. The proper listing for the _refine_ls_abs_structure_Flack entry in the CIF should be ? since no value was determined, and the entry for _refine_ls_abs_structure_details should be 'not determined'.

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[ Last edited by konghuihui99 on 2009-1-19 at 16:21 ]
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konghuihui99

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wangningsir

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konghuihui99(½ð±Ò+10,VIP+0):лл£¬ÒÔºóÔÙ×·¼Ó½ð±Ò
waiy2001(½ð±Ò+1,VIP+0):
konghuihui99(½ð±Ò+10):лл°ïÖúÎÒ½â´ðÎÊÌâ 1-19 16:24
·­×ªÏ¹¹ÐÍÊÔÊÔ£¿invert structure

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xi2004

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konghuihui99(½ð±Ò+9,VIP+0):µÚÒ»´Î¼Ó´íÁË
waiy2001(½ð±Ò+1,VIP+0):
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Originally posted by wangningsir at 2009-1-14 01:07:
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xi2004-emuch@163.com
5Â¥2009-01-14 09:00:33
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konghuihui99

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ÄúÊÇÖ¸ÔÚcifÀï¸ÃÕâÁ½¸öµØ·½¾Í¿ÉÒÔÁËÂð

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Originally posted by xi2004 at 2009-1-14 09:00:


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6Â¥2009-01-14 10:42:16
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xi2004

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waiy2001(½ð±Ò+1,VIP+0):
konghuihui99(½ð±Ò+10):лл°ïÖúÎÒ½â´ðÎÊÌâ 1-19 16:23
ÊǵÄ. ͬʱ¸æË߱༭flack parameter was not included as a free variable.
xi2004-emuch@163.com
7Â¥2009-01-14 11:43:32
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crystalsnet

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konghuihui99(½ð±Ò+10):лл°ïÖúÎÒ½â´ðÎÊÌâ 1-19 16:22
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konghuihui99

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xi2004

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ΪÄã¸ßÐË, µ«crystalsnet  ÏȻشðµÄ, ¶øÇÒ˵µÃºÜºÃÁË, ÎÒÖ»ÊǸ½Òé¶øÒÑ, ²»ÖµµÃ·¢Õâô¶à½ð±Ò°¡.
xi2004-emuch@163.com
10Â¥2009-01-19 16:50:15
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