The (8-4) structure

The (8-4) structure is the same structure as HgBr2 structure if the small distortion is adjusted. Generally, densest structures is distorted because the distortion is necessary to achieve a high packing fraction. The structural data of the (8-4) structure at several radius ratios: $0.431$, $0.434$, $0.437$, $0.440$, $0.443$, $0.445$, $0.448$, $0.451$, $0.454$, $0.457$, $0.460$, $0.463$, $0.465$, $0.468$, $0.471$, $0.474$, and $0.477$, 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.