Comment on "Cage occupancy of methane clathrate hydrates in the ternary H 2 O-NH 3 -CH 4 system" by C. Petuya, M. Choukroun, T. H. Vu, A. Desmedt, A. G. Davies, and C. Sotin, Chem. Commun. , 2020, 56 , 12391.

Alternative interpretations of the experimental results given in the Communication of Petuya et al. 1 are presented. There is evidence that under certain conditions, ammonia can be incorporated into clathrate hydrate cages.