Ba2MgNdSbO6 crystallizes in the triclinic P-1 space group. Ba(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Mg(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Nd(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NdO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-36°. Sb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted SbO6 octahedra that share corners with six equivalent Nd(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-36°. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ba(1), one Mg(1), one Nd(1), and one Sb(1) atom to form a mixture of distorted edge and corner-sharing OBa2NdMgSb trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Ba(1), one Mg(1), one Nd(1), and one Sb(1) atom to form a mixture of distorted edge and corner-sharing OBa2NdMgSb trigonal bipyramids. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ba(1), one Nd(1), and one Sb(1) atom.
Ba2MgNdSbO6 crystallizes in the triclinic P-1 space group. Ba(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. There is one shorter (2.96 Å) and one longer (3.00 Å) Ba(1)-O(1) bond length. There is one shorter (2.79 Å) and one longer (2.91 Å) Ba(1)-O(2) bond length. Both Ba(1)-O(3) bond lengths are 2.64 Å. Mg(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Mg(1)-O(1) bond lengths are 2.16 Å. Both Mg(1)-O(2) bond lengths are 1.99 Å. Nd(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form NdO6 octahedra that share corners with six equivalent Sb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-36°. Both Nd(1)-O(1) bond lengths are 2.36 Å. Both Nd(1)-O(2) bond lengths are 2.34 Å. Both Nd(1)-O(3) bond lengths are 2.47 Å. Sb(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form distorted SbO6 octahedra that share corners with six equivalent Nd(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 12-36°. Both Sb(1)-O(1) bond lengths are 2.30 Å. Both Sb(1)-O(2) bond lengths are 2.25 Å. Both Sb(1)-O(3) bond lengths are 2.66 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ba(1), one Mg(1), one Nd(1), and one Sb(1) atom to form a mixture of distorted edge and corner-sharing OBa2NdMgSb trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Ba(1), one Mg(1), one Nd(1), and one Sb(1) atom to form a mixture of distorted edge and corner-sharing OBa2NdMgSb trigonal bipyramids. In the third O site, O(3) is bonded in a distorted rectangular see-saw-like geometry to two equivalent Ba(1), one Nd(1), and one Sb(1) atom.