Until now all lines of evidence presented here have indicated that the electrons form delocalized bandstates which is in agreement with previous INS and solid-state NMR studies. However, we have not resolved whether the bandstate constitutes single or double occupied hydride sites, which has been subject of dispute in previous reports. In order to address this issue we computed electric-field gradient (EFG) tensors using DFT calculations on the two bandstate structures along with polaronic state for a comprehensive comparison between the different states. We performed the calculations on three different quantum chemistry programs, Quantum ESPRESSO, WIEN2k and ORCA, each treating the electron wavefunction in a distinct manner.