EPSRC National Crystallography Service
Data Collection Summary kccd2 (damien)


Summary report for Directory: home/diska/2005src1569

Report generated Nov 30, 2005; 16:17:45

Unit cell

3684 reflections with 2.91°<theta<27.48° (resolution between 7.00A and 0.77A) were used for unit cell refinement

Symmetry used
in scalepack
p2
a (Angstrom)7.8290 +/- 0.0004
b (Angstrom)8.3126 +/- 0.0004
c (Angstrom)24.1656 +/- 0.0009
alpha (°) 90.000
beta (°)99.149 +/- 0.002
gamma (°) 90.000
Volume (A**3)1552.68 +/- 0.12
Mosaicity (°)0.454 +/- 0.002

Data collection

Summary

Total number of images collected296
Total exposure time98.4 minutes
Data collection exposure time97.1 minutes
Data collection wall-clock time122.3 minutes

Experimental Conditions

Wavelength0.71073 A
Crystal to detector distance48.00 mm

Scans

TypeName# imagesTotal
Rotation
Per frame
Rotation
Exposure
per frame
Used in
scaling
data collections01f181362.0° phi2.000°20 secondsYes
data collections02f37 74.0° omega2.000°20 secondsYes
data collections03f70140.0° omega2.000°20 secondsYes
Phi/Chii01f - i08f810 seconds

Scalepack Scaling

Deleted observations

Rejected 145
Zero sigma or profile test   1
Overload or incomplete profile 552
Sigma cutoff   5
High resolution limit   8

Final Data Set

Scale factor range7.65-14.95
Number of 'full' reflections 12758
Number of 'partial' reflections  5423
Total number of integrated reflections 17537
Total number of unique reflections  3799
Data completeness  99.6%
Resolution range7.00-0.77 A
Theta range2.91°-27.48°
Average Intensity   68.6
Average Sigma(I)    2.3
Overall R-merge (linear)  0.054

Sadabs Results

Parameter refinement on 11960 reflections reduced R(int) from 0.2030 to 0.0426

Before rejection, 17562 reflections total and 3807 unique

After rejection, 17262 reflections total and 3805 unique

Runs

  Run 2-theta  R(int)  Incid. factors  Diffr. factors    K     Total I>2sig(I)
    1   20.6  0.0475   0.648 - 1.205   0.920 - 1.072   1.382   10911    7907
    2  -20.4  0.0568   0.699 - 0.813   0.954 - 1.033   1.447    2193    1518
    3  -20.0  0.0493   0.734 - 1.275   0.932 - 1.061   1.435    4158    2873
Ratio of minimum to maximum apparent transmission: 0.857546

Metadata

  Group    Service  
  Operator   Peter Horton  
  Sample Owner   Dr. N. Greeves  
  Local Code   384/3  
  Formula   C18 H26 O1  
  Crystal Colour    Colourless  
  Crystal Habit    Slab  
  Crystal Size   0.28 x 0.18 x 0.06 (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    '10cm confocal mirrors'
_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/