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bomblee無蟲 (初入文壇)
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【求助】銅靶晶體數(shù)據(jù)問題 已有6人參與
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麻煩高手幫忙看一下,A類錯誤應(yīng)該怎么解決! 還有就是Nref 1333(cal) 344(reported)為什么差這么多!(注:分子具有C3對稱性) Datablock: 1 Bond precision: C-C = 0.0322 A Wavelength=1.54184 Cell: a=14.425(8) b=14.425(8) c=6.2580(18) alpha=90 beta=90 gamma=120 Temperature: 293 K Calculated Reported Volume 1127.7(9) 1127.7(9) Space group P -3 P -3 Hall group -P 3 -P 3 Moiety formula C27 H18 Fe N3 O3 ? Sum formula C27 H18 Fe N3 O3 C27 H18 Fe N3 O3 Mr 488.29 488.29 Dx,g cm-3 1.438 1.438 Z 2 2 Mu (mm-1) 5.652 5.652 F000 502.0 502.0 F000’ 501.14 h,k,lmax 17,17,7 8,14,5 Nref 1333 344Tmin,Tmax 0.102,0.191 Tmin’ Correction method= SPHERE Data completeness= 0.258 Theta(max)= 66.480 R(reflections)= 0.0676( 259) wR2(reflections)= 0.1729( 344) S = 1.034 Npar= 98 Alert level A REFLT03_ALERT_3_A Reflection count < 85% complete (theta max?) From the CIF: _diffrn_reflns_theta_max 66.48 From the CIF: _diffrn_reflns_theta_full 66.48 From the CIF: _reflns_number_total 344 TEST2: Reflns within _diffrn_reflns_theta_max Count of symmetry unique reflns 1333 Completeness (_total/calc) 25.81% PLAT022_ALERT_3_A Ratio Unique / Expected Reflections too Low .... 0.26 PLAT029_ALERT_3_A _diffrn_measured_fraction_theta_full Low ....... 0.26 PLAT088_ALERT_3_A Poor Data / Parameter Ratio .................... 3.51 [ Last edited by bomblee on 2010-5-5 at 13:16 ] |
木蟲 (職業(yè)作家)

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