The phenomenon of lattice misorientation observed in this work could also be linked to the formation of intragranular cracks observed recently for NMC materials . At such low misorientation angles it is very hard to distinguish a low-angle tilt boundary and a nascent microcrack. In addition to that the link between these phenomena can be complex as one could be a direct cause of another. Intragranular cracks that are fully contained inside a single crystal particles were observed recently during high voltage cycling of NMC cathode material . Their formation was associated with dislocation defects present in the lattice. The reorientation phenomenon observed in this work is not the first time that a reversible formation of microstructural defects has been observed for cathode materials. Previously planar gliding was observed for single crystal Nirich NMC particles and was suggested to also induce microcracks in the particle. Despite apparent differences between these phenomena (reversibility after one of the phase transitions in LMNO vs after the whole cycle in NMC, 1 st order transition vs solid solution, differences in effect magnitude) this example highlights the importance of such dynamic microstructural features for the long term stability during single particle delithiation. During continuous cycling, alternate formation and merging of the tilt boundaries could lead to generation and accumulation of localized strain and stress within the particle. Over multiple cycles, the potential outcome of such dynamics is a formation of cracks in place of the tilt boundaries and subsequent capacity fade and decrease of cycle life. Coupled with the fact that defects are also expected to facilitate microcrack formation , this could serve as a mechanism of crack formation in single crystal cathodes.