Na3In is Uranium Silicide-like 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 to four equivalent Na(1), four equivalent Na(2), and four equivalent In(1) atoms to form distorted NaNa8In4 cuboctahedra that share corners with twelve equivalent Na(1)Na8In4 cuboctahedra, edges with eight equivalent Na(1)Na8In4 cuboctahedra, edges with eight equivalent In(1)Na12 cuboctahedra, faces with four equivalent In(1)Na12 cuboctahedra, and faces with ten equivalent Na(1)Na8In4 cuboctahedra. In the second Na site, Na(2) is bonded in a distorted square co-planar geometry to eight equivalent Na(1) and four equivalent In(1) atoms. In(1) is bonded to four equivalent Na(2) and eight equivalent Na(1) atoms to form InNa12 cuboctahedra that share corners with four equivalent In(1)Na12 cuboctahedra, edges with eight equivalent In(1)Na12 cuboctahedra, edges with sixteen equivalent Na(1)Na8In4 cuboctahedra, faces with four equivalent In(1)Na12 cuboctahedra, and faces with eight equivalent Na(1)Na8In4 cuboctahedra.
Na3In is Uranium Silicide-like 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 to four equivalent Na(1), four equivalent Na(2), and four equivalent In(1) atoms to form distorted NaNa8In4 cuboctahedra that share corners with twelve equivalent Na(1)Na8In4 cuboctahedra, edges with eight equivalent Na(1)Na8In4 cuboctahedra, edges with eight equivalent In(1)Na12 cuboctahedra, faces with four equivalent In(1)Na12 cuboctahedra, and faces with ten equivalent Na(1)Na8In4 cuboctahedra. All Na(1)-Na(1) bond lengths are 3.44 Å. All Na(1)-Na(2) bond lengths are 3.46 Å. All Na(1)-In(1) bond lengths are 3.46 Å. In the second Na site, Na(2) is bonded in a distorted square co-planar geometry to eight equivalent Na(1) and four equivalent In(1) atoms. All Na(2)-In(1) bond lengths are 3.44 Å. In(1) is bonded to four equivalent Na(2) and eight equivalent Na(1) atoms to form InNa12 cuboctahedra that share corners with four equivalent In(1)Na12 cuboctahedra, edges with eight equivalent In(1)Na12 cuboctahedra, edges with sixteen equivalent Na(1)Na8In4 cuboctahedra, faces with four equivalent In(1)Na12 cuboctahedra, and faces with eight equivalent Na(1)Na8In4 cuboctahedra.