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novayeyu

ľ³æ (СÓÐÃûÆø)


[½»Á÷] ¡¾ÇóÖú¡¿Çë½Ì½øÐÐcheckCIF/PLATONʱ £¬ÕâÑùµÄAÀà´íÎóÔõô´¦Àí£¬Çë¸ßÊÖÖ¸µãÒ»¶þ

ÔÚ½øÐÐcheckCIF/PLATON ʱ£¬µÚÒ»´ÎÅö¼ûÕâÖÖAÀà´íÎó£¬Ôõô´¦ÀíµÄ¹þ£¬¡£
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PLAT731_ALERT_1_A Bond    Calc  2.9343(19), Rep   2.9340(2) ......       9.50 su-Ra
BA1  -O1      1.555  13.566                  #          1
PLAT731
________________________________________
PLAT731 Type_1 Test for consistency of Bond su's and Coordinate su's in CIF
________________________________________
A large ratio of the reported and calculated bond s.u.'s is found.
The use of a DFIX instruction might cause such a warning since
calculated s.u.'s are based on reported variances only.
Note_1: su's on the unit-cell dimensions are taken into account in the
calculation of expected su's. This may result in large differences
between expected and reported su's when this contribution is not included
in the reported su's, in particular for inaccurate unit-cells.
Note_2: Another source for the discrepancy between calculated and
reported su's can be that the validation software has access only to
the variances of the refined parameters as opposed to the full co-variance
matrix used by e.g. SHELXL for the calculation of derived parameters
with associated su's. Constrained/restrained refinement may cause largei
co-variances.  


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[ Last edited by novayeyu on 2010-11-30 at 19:35 ]
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fanghua3062

Ìú¸Ëľ³æ (СÓÐÃûÆø)


novayeyu(½ð±Ò+3):лл 2010-11-30 23:18:08
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2Â¥2010-11-30 21:42:45
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novayeyu

ľ³æ (СÓÐÃûÆø)


ÒýÓûØÌû:
Originally posted by fanghua3062 at 2010-11-30 21:42:45:
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3Â¥2010-11-30 23:21:33
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