EPSRC National Crystallography Service
Data Collection Summary kccd1 (dellboy)


Summary report for Directory: diska/04skc0004

Report generated Aug 16, 2004; 16:33:50

Unit cell

2511 reflections with 2.91°<theta<27.48° (resolution between 7.00A and 0.77A) were used for unit cell refinement

Symmetry used
in scalepack
p1
a (Angstrom)7.6321 +/- 0.0003
b (Angstrom)8.2179 +/- 0.0002
c (Angstrom)10.1330 +/- 0.0004
alpha (°)98.692 +/- 0.002
beta (°)106.4257 +/- 0.0018
gamma (°)105.144 +/- 0.002
Volume (A**3)570.79 +/- 0.04
Mosaicity (°)0.449 +/- 0.002

Data collection

Summary

Total number of images collected323
Total exposure time107.5 minutes
Data collection exposure time106.2 minutes
Data collection wall-clock time137.8 minutes

Experimental Conditions

Wavelength0.71073 A
Crystal to detector distance30.00 mm

Scans

TypeName# imagesTotal
Rotation
Per frame
Rotation
Exposure
per frame
Used in
scaling
data collections01f181362.0° phi2.000°20 secondsYes
data collections02f23 46.0° omega2.000°20 secondsYes
data collections03f33 66.0° omega2.000°20 secondsYes
data collections04f55110.0° omega2.000°20 secondsYes
data collections05f23 46.0° omega2.000°20 secondsYes
Phi/Chii01f - i08f810 seconds

Scalepack Scaling

Deleted observations

Rejected  53
Overload or incomplete profile 394
Sigma cutoff   3

Final Data Set

Scale factor range9.82-10.21
Number of 'full' reflections  9021
Number of 'partial' reflections  4215
Total number of integrated reflections 12583
Total number of unique reflections  2617
Data completeness  99.5%
Resolution range7.00-0.77 A
Theta range2.91°-27.48°
Average Intensity   74.7
Average Sigma(I)    2.1
Overall R-merge (linear)  0.029

Sadabs Results

Parameter refinement on 9688 reflections reduced R(int) from 0.0558 to 0.0281

Before rejection, 12637 reflections total and 2619 unique

After rejection, 12526 reflections total and 2617 unique

Runs

  Run 2-theta  R(int)  Incid. factors  Diffr. factors    K     Total I>2sig(I)
    1    7.4  0.0295   0.992 - 1.066   0.968 - 1.056   1.221    7349    5903
    2   -6.8  0.0316   0.989 - 1.055   0.949 - 1.038   1.205     857     703
    3   -6.8  0.0294   0.652 - 0.688   0.952 - 1.054   1.183    1269    1040
    4   -6.8  0.0299   0.891 - 0.970   0.949 - 1.042   1.179    2177    1763
    5   -6.8  0.0305   1.015 - 1.083   0.955 - 1.035   1.208     874     703
Ratio of minimum to maximum apparent transmission: 0.897998

Metadata

  Group    Mike Hursthouse  
  Operator   Sam Callear  
  Sample Owner     
  Local Code   TLT374D G9  
  Formula   C8H15O7N1  
  Crystal Colour    Colourless  
  Crystal Habit    Block  
  Crystal Size   0.18 x 0.2 x 0.4 (mm3) 
  Temperature   120(K) 
  Generator   50 (kV)   85 (mA) 
  Primary Solvent     
  Other Solvents     

File Explanations

SampleCode.zip
      SampleCode.hkl - data corrected using  SADABS
      SampleCode_merge_none.hkl - equivalents and friedels kept separate  (See "Final Data Set" table in this report)
      SampleCode.p4p - skeleton p4p file for use with XPREP
      SampleCode.htm - this summary file


Southampton CIF entry fields

_exptl_absorpt_process_details       'SADABS V2.10 (Sheldrick, G.M., 2003)'

_diffrn_ambient_temperature           120(2)
_diffrn_radiation_wavelength           0.71073
_diffrn_radiation_type                      MoK\a
_diffrn_radiation_source                  'Bruker-Nonius FR591 rotating anode'
_diffrn_radiation_monochromator    'graphite'
_diffrn_measurement_device_type  'Bruker-Nonius 95mm CCD camera on \k-goniostat'
_diffrn_measurement_method          '\f & \w scans'
_diffrn_detector_area_resol_mean   9.091

_computing_data_collection        
'COLLECT (Hooft, R.W.W., 1998)'
_computing_cell_refinement        
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)'
#Although determined using DirAx, the cell is refined in the HKL
#package during data reduction
_computing_data_reduction         
'DENZO (Otwinowski & Minor, 1997) & COLLECT (Hooft, R.W.W., 1998)' 

Software References

Unit Cell Determination using DirAx:
Duisenberg AJM. Indexing in Single-Crystal Diffractometry with an Obstinate List of Reflections. Journal of Applied Crystallography 1992; 25: 92-96.
Duisenberg AJM, Hooft RWW, Schreurs AMM, Kroon J. Accurate cells from area-detector images. Journal of Applied Crystallography 2000; 33: 893-898.

Diffractometer control and strategy calculation using COLLECT:
Hooft RWW. COLLECT data collection software, Nonius B.V., 1998.

Standard Data Reduction using HKL(Denzo & Scalepack):
Otwinowski Z, Minor W. Processing of X-ray diffraction data collected in oscillation mode. Macromolecular Crystallography, Pt A. 1997; 276: 307-326.

Absorption Correction
Sheldrick, G. M. (2003). SADABS. Version 2.10. Bruker AXS Inc., Madison, Wisconsin, USA.

Non-Standard Data Reduction using EvalCCD:
Duisenberg AJM, Kroon-Batenburg LMJ, Schreurs AMM. An intensity evaluation method: EVAL-14. Journal of Applied Crystallography 2003; 36: 220-229.

For more information visit the service web site at: http://www.soton.ac.uk/~xservice/