Unit cells of most forms of ice can be found in databases such as American Mineralogist Crystal Structure Database and crystallography open database, in the form of .cif files. The specific structures used in this paper are Ic 52 and XI . The cif. files were converted to .pdb files using Mercury. Both unit cells contain 8 molecules. In this paper, we are focused on three system sizes (supercells containing 16, 32, and 64 molecules). The supercells containing these numbers of molecules were obtained by replicating the unit cells by translational stacking. Specifically, if the unit cell is 111, then the two respective sets of supercells of Ic and XI were 211,221,222 and 211,212,222. In creating supercells, we generally prefer supercells that are as close to cubic as possible.