The experiment aims at the investigation of the local structure in novel perovskite oxyhydrides BaTiO3-xHx in the temperature range 300 ¿ 900 K by performing NPD experiments on deuterides with two compositions (x = 0.10 and 0.55). Conventional crystallography established a perfect solid solution behavior of O and H, which is highly unusual because of the incompatibility of O2- and strongly reducing H- to form a common anion substructure. Because of the chemical dissimilarity of O2- and H- one can expect that the local coordination environments of the metal ions are intricately distorted. This should reveal from a PDF analysis of neutron total scattering data. Furthermore, mapping the average and local structure as a function of temperature will provide first insight into the predicted H dynamics of BaTiO3-xHx and help in the preparation for dedicated studies by QENS.