PLATON HOMEPAGE

- Check for resolution in sin(theta) / lambda
- Check for completeness as a function of resolution
- Check for quality in terms of 'Observed Data'
- Check for missing reflection data (in cusps etc.)

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- Zone-H
- Zone-K
- Zone-L
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- Summary
- Resolution
- Axes
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- OMIT STH/L
- OMIT SIG(I)
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- MissingRefl
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- N-Measured
- ObsCalcDelt
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- Up Down
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- Decoration
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- EPS End

- Data are averaged on the basis of the Laue group associated with the
given space group (i.e. Friedel related reflections are averaged)

E.g. data for P21 are averaged according to 2/m. - The Unique data set thus obtained is expanded again to fill half a
sphere (hemisphere) of data.
- A section of the reciprocal lattice is shown in
Fig. 1 - Display of hk6-layer

Observed unique reflections are depicted by a number indicating there I/sigma(I).

Stars indicate reflections with I/sigma(I) .GE. 10.

**L**indicates reflections with Intensity .LT. the observance criterium (I.e. I .LT. 2 sigma(I)).Space group extinctions are either shown as void areas or with

**E**.missing data in the asymmetric reflection unit are shown as

**?**Symmetry related reflections are depicted with

**+**(or**#**for symmetry relatives of missing data). - Legend to the right column numerical data in Fig 1
- SpaceGr - Spacegroup (determing
- a - a-axis (Angstrom)
- b - b-axis
- c - c-axis
- alpha - alpha - angle (degrees)
- beta - beta angle
- gamma - gamma angle
- Th(max) - Maximum theta of data set (possibly reset from menu).
- SigOmit - Current sigma(I) criterium
- Total - Total number of read reflections within theta(max).
- Unique - Number of unique reflections within theta(max) (ecluding systematic extinctions).
- Obsd - number of observed reflection within current sigma(I) and
theta(max) range (excluding systematic extinctions).
**Cumulative** - Layer - current range of layers surveyed
- SpGrExt - current count of space group extinctions
- MaxUniq - current count of possible unique reflections (excluding systematic extinctions)
- Missing - current count of missing unique non-extinction reflections in data set
- Resol - resolution (sin(theta)/lambda
- Perc - Completeness (%) up and including this sin(theta)/lambda range.

Notes:

**MaxUniq**corresponds to the supplied Th(Max), associated with the maximum theta found in the input dataset.**Unique**corresponds to the number of unique reflections found on input.**Missing**is the difference between MaxUniq and Unique and should in general be zero apart from possibly a few close to the primary beam reflections that could not be measured.

See also VIEW-ASYM

PLATON HOMEPAGE