This database is dedicated to incommensurate modulated and composite structures. Commensurate structures described in the superspace formalism are also included.
The database currently hosts 143 entries (of which 24 are composites). (Show all entries)
This initial database includes mainly structures published in Acta Crystallographica since the search engine at Chester allowed us a rapid collection of the papers.
Some structural parameters have been modified to fulfill the recommendations
of the IUCr (for instance thermal displacement parameters in Beta form are not
allowed) and to get a unified description of the modulations which permits an
easy and safe manipulation of the stored data.
In general the structures are described using the superspace formalism. Modulations can be parameterized according to the different functions in use.
The stored CIFs have been checked for consistency and typos. However, errors due to a bad interpretation of the published data or undetected typographic mistakes may still be there.
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