(i) A family of site with lower CQ when compared to the DFT calculated cluster models (8 vs. 15 MHz), assigned to GaBA, a tetra-coordinated Ga site bound by 3 anionic siloxy ligands and an adjacent -OH group that is depronated upon adsorption of The CQ of these sites is likely affected by the dynamic of the pyridium counter cation, thus explaining the lower observed CQ.