Na3Os 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 Os(1) atoms to form a mixture of distorted edge, face, and corner-sharing NaNa4Os4 tetrahedra. In the second Na site, Na(2) is bonded in a 14-coordinate geometry to eight equivalent Na(1) and six equivalent Os(1) atoms. Os(1) is bonded in a distorted body-centered cubic geometry to six equivalent Na(2) and eight equivalent Na(1) atoms.
Na3Os 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 Os(1) atoms to form a mixture of distorted edge, face, and corner-sharing NaNa4Os4 tetrahedra. All Na(1)-Na(2) bond lengths are 3.12 Å. All Na(1)-Os(1) bond lengths are 3.12 Å. In the second Na site, Na(2) is bonded in a 14-coordinate geometry to eight equivalent Na(1) and six equivalent Os(1) atoms. All Na(2)-Os(1) bond lengths are 3.60 Å. Os(1) is bonded in a distorted body-centered cubic geometry to six equivalent Na(2) and eight equivalent Na(1) atoms.