Sr2MgOsO6 is (Cubic) Perovskite-derived structured and crystallizes in the tetragonal I4/m space group. Sr(1) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form SrO12 cuboctahedra that share corners with twelve equivalent Sr(1)O12 cuboctahedra, faces with six equivalent Sr(1)O12 cuboctahedra, faces with four equivalent Mg(1)O6 octahedra, and faces with four equivalent Os(1)O6 octahedra. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Os(1)O6 octahedra and faces with eight equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-10°. Os(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form OsO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra and faces with eight equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-10°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to four equivalent Sr(1), one Mg(1), and one Os(1) atom. In the second O site, O(2) is bonded to four equivalent Sr(1), one Mg(1), and one Os(1) atom to form a mixture of distorted edge and corner-sharing OSr4MgOs octahedra. The corner-sharing octahedral tilt angles range from 0-2°.
Sr2MgOsO6 is (Cubic) Perovskite-derived structured and crystallizes in the tetragonal I4/m space group. Sr(1) is bonded to four equivalent O(2) and eight equivalent O(1) atoms to form SrO12 cuboctahedra that share corners with twelve equivalent Sr(1)O12 cuboctahedra, faces with six equivalent Sr(1)O12 cuboctahedra, faces with four equivalent Mg(1)O6 octahedra, and faces with four equivalent Os(1)O6 octahedra. All Sr(1)-O(2) bond lengths are 2.81 Å. There are four shorter (2.70 Å) and four longer (2.94 Å) Sr(1)-O(1) bond lengths. Mg(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form MgO6 octahedra that share corners with six equivalent Os(1)O6 octahedra and faces with eight equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-10°. Both Mg(1)-O(2) bond lengths are 2.05 Å. All Mg(1)-O(1) bond lengths are 2.05 Å. Os(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form OsO6 octahedra that share corners with six equivalent Mg(1)O6 octahedra and faces with eight equivalent Sr(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-10°. Both Os(1)-O(2) bond lengths are 1.94 Å. All Os(1)-O(1) bond lengths are 1.93 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to four equivalent Sr(1), one Mg(1), and one Os(1) atom. In the second O site, O(2) is bonded to four equivalent Sr(1), one Mg(1), and one Os(1) atom to form a mixture of distorted edge and corner-sharing OSr4MgOs octahedra. The corner-sharing octahedral tilt angles range from 0-2°.