This section handles the calculation of structural and temporal properties related to the tin lone pair. It contains all the notebooks for this analysis which are detailed in the readme. Further it contains the results of wannierisation and the dipoles calculated from these results, taken from structures with static and mobile fluoride ions. Each directory contains the files: dipoles.out, wannier90.eig, wannier90.wout, wannier2dipoles_new.py, wannier90.win, wannier90_centres.xyz, and POSCAR.