Inelastic Neutron Scattering spectrum of Yttrium manganese hydride x=6.0, YMn2H6.0, measured on the TOSCA instrument. Ionic material Fm-3m space group: (Y,Mn)[MnH6], Y2+ and Mn2+ are disordered on the tetrahedral sites and [MnH6]2- ions occupy the octahedral sites..