This proposal requests 5 days on TOSCA with the aim to investigate the compositional dependence (x) of the local coordination and vibrational properties of the novel class of hydride-ion conducting perovskite oxyhydrides BaTiO3-xHx (x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, and 0.6), including one deuterated equivalent (BaTiO2.4D0.6). The results will be correlated/compared with the corresponding Raman/IR spectra, to be measured in our home laboratory, as well as with results obtained from first-principles phonon calculations. The combination of results should provide detailed information regarding the structure and hydride-ion vibrational dynamics in perovskite oxyhydrides and hence increase our understanding of these materials. In particular, the results should help in the analysis of future QENS studies targeted at elucidating the hydride-ion dynamics on a local- to intermediate length-scale.