Ba2MgNdSbO6 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and one O(6) atom. In the second Ba site, Ba(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(5) atom. Mg(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(5) atom. Nd(1) is bonded in a distorted octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. Sb(1) is bonded in a distorted trigonal non-coplanar geometry to one O(3), one O(4), and one O(6) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Nd(1) atom. In the second O site, O(2) is bonded to one Ba(1), one Ba(2), one Mg(1), and one Nd(1) atom to form a mixture of distorted corner and edge-sharing OBa2NdMg tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ba(2), one Mg(1), one Nd(1), and one Sb(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Ba(1), one Ba(2), one Nd(1), and one Sb(1) atom. In the fifth O site, O(5) is bonded to one Ba(1), one Ba(2), one Mg(1), and one Nd(1) atom to form a mixture of distorted corner and edge-sharing OBa2NdMg tetrahedra. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Ba(1), one Nd(1), and one Sb(1) atom.
Ba2MgNdSbO6 crystallizes in the triclinic P1 space group. There are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(4), one O(5), and one O(6) atom. The Ba(1)-O(1) bond length is 2.70 Å. The Ba(1)-O(2) bond length is 2.57 Å. The Ba(1)-O(4) bond length is 2.74 Å. The Ba(1)-O(5) bond length is 2.61 Å. The Ba(1)-O(6) bond length is 2.90 Å. In the second Ba site, Ba(2) is bonded in a 5-coordinate geometry to one O(1), one O(2), one O(3), one O(4), and one O(5) atom. The Ba(2)-O(1) bond length is 2.55 Å. The Ba(2)-O(2) bond length is 2.58 Å. The Ba(2)-O(3) bond length is 3.02 Å. The Ba(2)-O(4) bond length is 2.90 Å. The Ba(2)-O(5) bond length is 2.54 Å. Mg(1) is bonded in a rectangular see-saw-like geometry to one O(1), one O(2), one O(3), and one O(5) atom. The Mg(1)-O(1) bond length is 2.03 Å. The Mg(1)-O(2) bond length is 1.99 Å. The Mg(1)-O(3) bond length is 2.06 Å. The Mg(1)-O(5) bond length is 2.01 Å. Nd(1) is bonded in a distorted octahedral geometry to one O(1), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The Nd(1)-O(1) bond length is 2.30 Å. The Nd(1)-O(2) bond length is 2.51 Å. The Nd(1)-O(3) bond length is 2.63 Å. The Nd(1)-O(4) bond length is 2.45 Å. The Nd(1)-O(5) bond length is 2.34 Å. The Nd(1)-O(6) bond length is 2.40 Å. Sb(1) is bonded in a distorted trigonal non-coplanar geometry to one O(3), one O(4), and one O(6) atom. The Sb(1)-O(3) bond length is 2.08 Å. The Sb(1)-O(4) bond length is 1.98 Å. The Sb(1)-O(6) bond length is 2.00 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to one Ba(1), one Ba(2), one Mg(1), and one Nd(1) atom. In the second O site, O(2) is bonded to one Ba(1), one Ba(2), one Mg(1), and one Nd(1) atom to form a mixture of distorted corner and edge-sharing OBa2NdMg tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one Ba(2), one Mg(1), one Nd(1), and one Sb(1) atom. In the fourth O site, O(4) is bonded in a distorted rectangular see-saw-like geometry to one Ba(1), one Ba(2), one Nd(1), and one Sb(1) atom. In the fifth O site, O(5) is bonded to one Ba(1), one Ba(2), one Mg(1), and one Nd(1) atom to form a mixture of distorted corner and edge-sharing OBa2NdMg tetrahedra. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Ba(1), one Nd(1), and one Sb(1) atom.