Note that a simple way to display the different types of interstitial
atoms in separate colors is to 
1) open the cif file in a text editor
2) edit the atom_symbol of one of the H types to be something else
   for instance make all the tetrahedral atoms Ht into He
    ie go from this (from 11c)
   Ht1        1.0     0.125000     0.125000     0.125000    Uiso  ? H
    to this
   Ht1        1.0     0.125000     0.125000     0.125000    Uiso  ? He
3) open with a visualizer


For EDF 11b
The file EDF_11b_as_optimized_from_cubic_LuH3.cif is the final structure produced from the Quantum Espresso optimization which began as a distorted cubic Fm3m LuH3 structure as described in the methods section

The file EDF_11b_symmetrized_version_of_optimized_structure.cif is the same structure as above, but with a space group symmetry detection tool applied to it.