Data to reproduce work in paper and SI. This repo is organized by paper figure/section and has the following zip files: Fig1_Table1_Fig2 : The different structures of H_1/4SmNiO3 investigate to establish the different polarization and energetics depending on the position of the H atom and the localized valence electron Fig3 : Data where in-plane, square epitaxial strain is applied to figures 1d and 1e of figure 1 Fig 4 : Data of longer range orderings SI : Data to reproduce the SI - organized by section. Each zip contains a README further explaning the contents