barriers.txt: 
Column 1 gives the reaction coordinate, where 0 is site 1, 0.5 is site 2 and 1 in site 1'
Column 2 gives the energy in eV, measured relative to the energy of site 1

displacements_X.dat:
Gives radial displacements of species X from the muon site as a function of the muon site
Column 1 gives distance from muon site (in Angstroms)
Column 2 gives radial displacement from muon site (in Angstroms)
