Na3Hg is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a body-centered cubic geometry to eight equivalent Na(2) atoms. In the second Na site, Na(2) is bonded to four equivalent Na(1) and four equivalent Hg(1) atoms to form a mixture of distorted corner, face, and edge-sharing NaNa4Hg4 tetrahedra. Hg(1) is bonded in a body-centered cubic geometry to eight equivalent Na(2) atoms.
Na3Hg is alpha bismuth trifluoride structured and crystallizes in the cubic Fm-3m space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a body-centered cubic geometry to eight equivalent Na(2) atoms. All Na(1)-Na(2) bond lengths are 3.29 Å. In the second Na site, Na(2) is bonded to four equivalent Na(1) and four equivalent Hg(1) atoms to form a mixture of distorted corner, face, and edge-sharing NaNa4Hg4 tetrahedra. All Na(2)-Hg(1) bond lengths are 3.29 Å. Hg(1) is bonded in a body-centered cubic geometry to eight equivalent Na(2) atoms.