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北京石油化工学院2026年研究生招生接收调剂公告
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llzh

铜虫 (正式写手)

[求助] 请高手解释

我有个晶体,结构都完全吻合,但在同向精细时数值怎么也下不来,到底是什么回事,数据如下
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Data:   36440 unique,      0 suppressed   R(int) = 0.0323   R(sigma) = 0.0350
Systematic absence violations:    0    Bad equivalents:  131
wR2 =  0.6749 before cycle   1 for  36440 data and  1101 /  1101 parameters
GooF = S =     3.161;     Restrained GooF =      3.161  for      0 restraints
Mean shift/esd =   0.030    Maximum =   0.557 for   y  Br4        at 15:09:20
Max. shift = 0.012 A for Br2      Max. dU = 0.002 for Br4                    
wR2 =  0.6748 before cycle   2 for  36440 data and  1101 /  1101 parameters
GooF = S =     3.160;     Restrained GooF =      3.160  for      0 restraints
Mean shift/esd =   0.033    Maximum =   0.658 for   y  Br4        at 15:11:09
Max. shift = 0.015 A for Br2      Max. dU = 0.002 for Br4                    
wR2 =  0.6747 before cycle   3 for  36440 data and  1101 /  1101 parameters
GooF = S =     3.160;     Restrained GooF =      3.160  for      0 restraints
Mean shift/esd =   0.025    Maximum =   0.633 for   x  Br2        at 15:12:59
Max. shift = 0.014 A for Br2      Max. dU = 0.002 for Br4                    
wR2 =  0.6747 before cycle   4 for  36440 data and  1101 /  1101 parameters
GooF = S =     3.160;     Restrained GooF =      3.160  for      0 restraints
Mean shift/esd =   0.021    Maximum =   0.607 for   x  Br2        at 15:14:43
Max. shift = 0.012 A for Br2      Max. dU = 0.002 for Br4                    
wR2 =  0.6747 before cycle   5 for  36440 data and     0 /  1101 parameters
GooF = S =     3.160;     Restrained GooF =      3.160  for      0 restraints
R1 =  0.2844 for  27834 Fo > 4sig(Fo)  and  0.3078 for all  36440 data
wR2 =  0.6747,  GooF = S =   3.160,  Restrained GooF =    3.160  for all data
R1 =  0.3050 for  36440 unique reflections after merging for Fourier
Highest peak    7.31  at -0.0008  0.3889  0.3005  [  3.36 A from O14 ]
Deepest hole   -2.13  at  0.8252  0.0553  0.4322  [  0.66 A from BR1 ]

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
+  07202         finished at 15:14:46   Total elapsed time:     429.5 secs  +
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mayujin222

金虫 (正式写手)

空间群对不

[ 发自手机版 http://muchong.com/3g ]
好好学习
3楼2011-08-04 20:43:39
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llzh

铜虫 (正式写手)

空间群是对的,前面那是同向精细,但数据下不来,这种情况进行异向精细感觉意义不大,还有Br-C健长约1.38,严重缩短,不知是怎么回事?求大侠解释
4楼2011-08-05 17:11:49
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