Coexistence of close packed structures in large substrate-free Ar-Kr clusters according to THEED data
This study utilizes in-situ transmission electron diffraction to demonstrate that large, substrate-free Ar-Kr clusters formed via supersonic expansion exhibit a size-dependent coexistence of fcc and hcp phases, with the hexagonal fraction increasing with cluster size and peaking at equimolar composition, supporting a thermally activated diffusion mechanism for hcp nucleation.