Sr2MgMnSbO6 crystallizes in the triclinic P-1 space group. Sr(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 to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share faces with two equivalent Sb(1)O6 octahedra. Mn(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. 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 faces with two equivalent Mg(1)O6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Sr(1), one Mg(1), one Mn(1), and one Sb(1) atom. In the second O site, O(2) is bonded to two equivalent Sr(1), one Mg(1), one Mn(1), and one Sb(1) atom to form a mixture of distorted corner and edge-sharing OSr2MgMnSb trigonal bipyramids. In the third O site, O(3) is bonded in a distorted see-saw-like geometry to two equivalent Sr(1), one Mg(1), and one Sb(1) atom.
Sr2MgMnSbO6 crystallizes in the triclinic P-1 space group. Sr(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 (2.53 Å) and one longer (2.86 Å) Sr(1)-O(1) bond length. There is one shorter (2.55 Å) and one longer (2.62 Å) Sr(1)-O(2) bond length. There is one shorter (2.45 Å) and one longer (2.83 Å) Sr(1)-O(3) bond length. Mg(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MgO6 octahedra that share faces with two equivalent Sb(1)O6 octahedra. Both Mg(1)-O(1) bond lengths are 2.10 Å. Both Mg(1)-O(2) bond lengths are 2.08 Å. Both Mg(1)-O(3) bond lengths are 2.21 Å. Mn(1) is bonded in a square co-planar geometry to two equivalent O(1) and two equivalent O(2) atoms. Both Mn(1)-O(1) bond lengths are 2.21 Å. Both Mn(1)-O(2) bond lengths are 2.08 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 faces with two equivalent Mg(1)O6 octahedra. Both Sb(1)-O(1) bond lengths are 2.26 Å. Both Sb(1)-O(2) bond lengths are 2.19 Å. Both Sb(1)-O(3) bond lengths are 2.07 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to two equivalent Sr(1), one Mg(1), one Mn(1), and one Sb(1) atom. In the second O site, O(2) is bonded to two equivalent Sr(1), one Mg(1), one Mn(1), and one Sb(1) atom to form a mixture of distorted corner and edge-sharing OSr2MgMnSb trigonal bipyramids. In the third O site, O(3) is bonded in a distorted see-saw-like geometry to two equivalent Sr(1), one Mg(1), and one Sb(1) atom.