The (2-1) structure

The (2-1) structure can be understood as a distorted XY2 structure. The structural data of the (2-1) structure at several radius ratios: $0.278$, $0.281$, $0.284$, $0.287$, $0.289$, $0.292$, $0.295$, and $0.298$, are downloadable here. The root directory contains several directories, which correspond to the several radius ratios. The structural data files are named by their packing fractions.