Xenon recognized as vacancy
I found a curious case:
https://nomad-lab.eu/prod/v1/gui/search/calculations/entry/id/zlkl1vpS3QHliZfRRxU856Q8sTRF
where Xenon (atomic number 54) is represented in as a vacancy ('X' in ase.Atoms
objects, atomic number 0). I did not investigate any further, but expect a parser issue.
The issue comes up both in production and staging.