Z prime (Z') property #2
Description
The issue was originally discussed in #1.
Z prime was mentioned as one of the pieces of information crystallographic databases would like to expose using the OPTIMADE interface. Unfortunately, an equivalent data name is currently not available in the cifCore dictionary. I have raised an issue to register a _cell.formula_units_Z_prime data item with the IUCr (see COMCIFS/cif_core#558).
I suggest that we wait for the IUCr decision. If rejected, the Z prime unit could still be added to the main OPTIMADE name space (or a different name space) if needed.