All the measurements were carried out for Sample 1 (bulk composition estimated by ICP-MS: Sr2.00(2)Mn1.07(2)O2Cu0.35(0)Li0.13(0)S2) of the deintercalated sulphide phase. A specimen for the TEM study was prepared by grinding the material under ethanol and depositing a few drops of the suspension onto a copper TEM grid covered by a holey carbon layer. The specimen was prepared in air. Threedimensional electron diffraction (3D ED) data were acquired on an FEI Tecnai G2 transmission electron microscope equipped with Gatan CCD camera operated at 200 kV. Each raw electron diffraction pattern was recorded at interval of 1° tilt within the tilting range of -65° to 70° and these were processed by means of the PETS software in order to reconstruct the main zone sections. High angle annular dark field (HAADF) scanning transmission electron microscopy (STEM) images were acquired using a FEI Titan 80-300 "cubed"