The (20-1) structure

The (20-1) structure can be understood as a clathrate structure. The structural data of the (20-1) structure at several radius ratios: $0.242$, $0.245$, $0.247$, $0.250$, $0.253$, $0.256$, $0.258$, $0.261$, $0.264$, $0.267$, $0.270$, $0.273$, $0.275$, and $0.278$, 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.