Sr3MgIrO6 crystallizes in the trigonal R-3c space group. Sr(1) is bonded in a 8-coordinate geometry to eight equivalent O(1) atoms. Mg(1) is bonded to six equivalent O(1) atoms to form distorted MgO6 pentagonal pyramids that share faces with two equivalent Ir(1)O6 octahedra. Ir(1) is bonded to six equivalent O(1) atoms to form IrO6 octahedra that share faces with two equivalent Mg(1)O6 pentagonal pyramids. O(1) is bonded to four equivalent Sr(1), one Mg(1), and one Ir(1) atom to form a mixture of distorted corner, edge, and face-sharing OSr4MgIr octahedra. The corner-sharing octahedral tilt angles range from 0-66°.
Sr3MgIrO6 crystallizes in the trigonal R-3c space group. Sr(1) is bonded in a 8-coordinate geometry to eight equivalent O(1) atoms. There are a spread of Sr(1)-O(1) bond distances ranging from 2.47-2.72 Å. Mg(1) is bonded to six equivalent O(1) atoms to form distorted MgO6 pentagonal pyramids that share faces with two equivalent Ir(1)O6 octahedra. All Mg(1)-O(1) bond lengths are 2.17 Å. Ir(1) is bonded to six equivalent O(1) atoms to form IrO6 octahedra that share faces with two equivalent Mg(1)O6 pentagonal pyramids. All Ir(1)-O(1) bond lengths are 2.03 Å. O(1) is bonded to four equivalent Sr(1), one Mg(1), and one Ir(1) atom to form a mixture of distorted corner, edge, and face-sharing OSr4MgIr octahedra. The corner-sharing octahedral tilt angles range from 0-66°.