[Cod-bugs] Undercounting of structure factors (reposting)

Thomas Munro t.munro at deakin.edu.au
Wed Apr 7 21:09:02 EEST 2021


Hi,
I'm resending this because I didn't receive a reply from the moderator last time, so I'm not sure if it got posted:

I'm not a trained crystallographer, so I may have misunderstood this,
but I notice that only a small fraction of COD entries are returned
under the “has Fobs” filter. This seems to refer to having a separate
hkl file. But checking recent structures without one, I find that
about half of them have the hkl data embedded in the cif. So I thought
it might be useful for users to flag these as well, so that the filter
would return many more examples. Presumably it would be
straightforward to detect them with a regular expression, or even just
by their much larger file size, and update the indexing. Just a
thought! Keep up the good work.
Cheers,
Thomas Munro

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