Na3C 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 to four equivalent Na(2) and four equivalent C(1) atoms to form a mixture of distorted corner, edge, and face-sharing NaNa4C4 tetrahedra. In the second Na site, Na(2) is bonded in a body-centered cubic geometry to eight equivalent Na(1) atoms. C(1) is bonded in a body-centered cubic geometry to eight equivalent Na(1) atoms.
Na3C 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 to four equivalent Na(2) and four equivalent C(1) atoms to form a mixture of distorted corner, edge, and face-sharing NaNa4C4 tetrahedra. All Na(1)-Na(2) bond lengths are 2.89 Å. All Na(1)-C(1) bond lengths are 2.89 Å. In the second Na site, Na(2) is bonded in a body-centered cubic geometry to eight equivalent Na(1) atoms. C(1) is bonded in a body-centered cubic geometry to eight equivalent Na(1) atoms.