NaBaCeSbO6 crystallizes in the orthorhombic Pnnn space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted square co-planar geometry to four equivalent O(2) atoms. In the second Na site, Na(2) is bonded in a distorted rectangular see-saw-like geometry to four equivalent O(3) atoms. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form BaO12 cuboctahedra that share corners with four equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with four equivalent Ce(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. In the second Ba site, Ba(2) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form distorted BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Ce(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. Ce(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CeO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra, faces with two equivalent Ba(1)O12 cuboctahedra, and faces with two equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 10-12°. Sb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form SbO6 octahedra that share corners with six equivalent Ce(1)O6 octahedra, faces with two equivalent Ba(1)O12 cuboctahedra, and faces with two equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 10-12°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Ba(1), one Ba(2), one Ce(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Na(1), one Ba(1), one Ba(2), one Ce(1), and one Sb(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Na(2), one Ba(1), one Ba(2), one Ce(1), and one Sb(1) atom.
NaBaCeSbO6 crystallizes in the orthorhombic Pnnn space group. There are two inequivalent Na sites. In the first Na site, Na(1) is bonded in a distorted square co-planar geometry to four equivalent O(2) atoms. All Na(1)-O(2) bond lengths are 2.81 Å. In the second Na site, Na(2) is bonded in a distorted rectangular see-saw-like geometry to four equivalent O(3) atoms. All Na(2)-O(3) bond lengths are 2.78 Å. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form BaO12 cuboctahedra that share corners with four equivalent Ba(2)O12 cuboctahedra, faces with two equivalent Ba(2)O12 cuboctahedra, faces with four equivalent Ce(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. All Ba(1)-O(1) bond lengths are 2.97 Å. All Ba(1)-O(2) bond lengths are 2.94 Å. All Ba(1)-O(3) bond lengths are 3.01 Å. In the second Ba site, Ba(2) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form distorted BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Ce(1)O6 octahedra, and faces with four equivalent Sb(1)O6 octahedra. All Ba(2)-O(1) bond lengths are 2.79 Å. All Ba(2)-O(2) bond lengths are 3.17 Å. All Ba(2)-O(3) bond lengths are 3.00 Å. Ce(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form CeO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra, faces with two equivalent Ba(1)O12 cuboctahedra, and faces with two equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 10-12°. Both Ce(1)-O(1) bond lengths are 2.23 Å. Both Ce(1)-O(2) bond lengths are 2.23 Å. Both Ce(1)-O(3) bond lengths are 2.24 Å. Sb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form SbO6 octahedra that share corners with six equivalent Ce(1)O6 octahedra, faces with two equivalent Ba(1)O12 cuboctahedra, and faces with two equivalent Ba(2)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 10-12°. Both Sb(1)-O(1) bond lengths are 2.02 Å. Both Sb(1)-O(2) bond lengths are 2.02 Å. Both Sb(1)-O(3) bond lengths are 2.01 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to one Ba(1), one Ba(2), one Ce(1), and one Sb(1) atom. In the second O site, O(2) is bonded in a 2-coordinate geometry to one Na(1), one Ba(1), one Ba(2), one Ce(1), and one Sb(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Na(2), one Ba(1), one Ba(2), one Ce(1), and one Sb(1) atom.