Na crystallizes in the cubic Pm-3n space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to twelve equivalent Na(2) atoms to form a mixture of face and edge-sharing NaNa12 cuboctahedra. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to two equivalent Na(2) and four equivalent Na(1) atoms.
Na crystallizes in the cubic Pm-3n space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded to twelve equivalent Na(2) atoms to form a mixture of face and edge-sharing NaNa12 cuboctahedra. All Na(1)-Na(2) bond lengths are 3.74 Å. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to two equivalent Na(2) and four equivalent Na(1) atoms. Both Na(2)-Na(2) bond lengths are 3.35 Å.