We synthesized LNCl via a solid-state synthesis route by heating stoichiometric amounts of LiCl and Li3N at 600°C for 3h and subsequent air quenching as following in ref . LNCl synthesized in this way is from now on referred to as LNCl-I. The lattice constants previously reported for LNCl range from 5.386 Å to 5.416 Å. This variation in the lattice parameter may be a consequence of the different annealing protocols employed for LNCl synthesis in refs. 15, 36 and