X-dVal: X-ray Data Validation

phenix.xtriage / Matthew's Coefficient / Twinning Detection / CRYST Record analysis

This server uses software developed by the Phenix project, specifically the phenix.xtriage program, and software developed in our lab.

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Job 53 (Mar 25th, 2013 [02:09 PM])   → twinning detected

Your X-dVal Results

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Section
Summary
Completeness Plot
CRYST1 Record Search
Twin Detection Plot
Anisotropicity analyses
Twinning Analyses
Patterson analyses
Systematic absences
Wilson ratio and moments
L test for acentric data
Twinning and intensity statistics summary
Twinning and intensity statistics summary (acentric data):

Statistics independent of twin laws
/^2 : 2.076
^2/ : 0.766
<|E^2-1|>   : 0.751
<|L|>, : 0.516, 0.358
Multivariate Z score L-test: 5.095

The multivariate Z score is a quality measure of the given
spread in intensities. Good to reasonable data are expected
to have a Z score lower than 3.5.
Large values can indicate twinning, but small values do not
necessarily exclude it.



Statistics depending on twin laws
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| Operator | type | R obs. | Britton alpha | H alpha | ML alpha |
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| l,-k,h   |   M  | 0.535  | -0.020        | 0.021   | 0.022    |
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Patterson analyses
- Largest peak height   : 2.329
(corresponding p value : 1.00000)


The largest off-origin peak in the Patterson function is 2.33% of the
height of the origin peak. No significant pseudotranslation is detected.

The results of the L-test indicate that the intensity statistics
Show more centric character than is expected for acentric data.

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