Phosphoric acid, H3PO4, is a technically important material as the electrolyte in commercial fuel cells because of its high protonic conductivity. The mechanism for the conduction is undetermined. We have observed in other superprotonic conductors, Nafion and Rb3H(SeO4)2, that the coherent delocalization of the protons is associated with high conductivity, and that this delocalization occurs in the hydrogen bond network of water when it is disordered by confinement. We propose an exploratory measurement to investigate the momentum distribution of phosphoric acid, in the solid and liquid, as the hydrogen bond network is disordered by the temperature and the phase transition to see if these effects occur in networks other than water and if they have any relation to the conductivity in this case.