Na3Cd is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to four equivalent Na(2) and four equivalent Cd(1) atoms. In the second Na site, Na(2) is bonded to eight equivalent Na(1) and four equivalent Cd(1) atoms to form NaNa8Cd4 cuboctahedra that share corners with four equivalent Na(2)Na8Cd4 cuboctahedra, corners with eight equivalent Cd(1)Na12 cuboctahedra, edges with eight equivalent Na(2)Na8Cd4 cuboctahedra, faces with four equivalent Na(2)Na8Cd4 cuboctahedra, and faces with six equivalent Cd(1)Na12 cuboctahedra. Cd(1) is bonded to four equivalent Na(2) and eight equivalent Na(1) atoms to form CdNa12 cuboctahedra that share corners with four equivalent Cd(1)Na12 cuboctahedra, corners with eight equivalent Na(2)Na8Cd4 cuboctahedra, edges with eight equivalent Cd(1)Na12 cuboctahedra, faces with four equivalent Cd(1)Na12 cuboctahedra, and faces with six equivalent Na(2)Na8Cd4 cuboctahedra.
Na3Cd is alpha bismuth trifluoride structured and crystallizes in the tetragonal I4/mmm space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a 4-coordinate geometry to four equivalent Na(2) and four equivalent Cd(1) atoms. All Na(1)-Na(2) bond lengths are 3.38 Å. All Na(1)-Cd(1) bond lengths are 3.38 Å. In the second Na site, Na(2) is bonded to eight equivalent Na(1) and four equivalent Cd(1) atoms to form NaNa8Cd4 cuboctahedra that share corners with four equivalent Na(2)Na8Cd4 cuboctahedra, corners with eight equivalent Cd(1)Na12 cuboctahedra, edges with eight equivalent Na(2)Na8Cd4 cuboctahedra, faces with four equivalent Na(2)Na8Cd4 cuboctahedra, and faces with six equivalent Cd(1)Na12 cuboctahedra. All Na(2)-Cd(1) bond lengths are 3.66 Å. Cd(1) is bonded to four equivalent Na(2) and eight equivalent Na(1) atoms to form CdNa12 cuboctahedra that share corners with four equivalent Cd(1)Na12 cuboctahedra, corners with eight equivalent Na(2)Na8Cd4 cuboctahedra, edges with eight equivalent Cd(1)Na12 cuboctahedra, faces with four equivalent Cd(1)Na12 cuboctahedra, and faces with six equivalent Na(2)Na8Cd4 cuboctahedra.