Sr2Mg(Cu2O3)2 is Pb (Zr_0.50 Ti_0.48) O_3-derived structured and crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form a mixture of corner and edge-sharing SrO6 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to two equivalent O(4) and four equivalent O(3) atoms. Mg(1) is bonded in a distorted linear geometry to two equivalent O(2) atoms. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted linear geometry to one O(2) and one O(3) atom. In the second Cu site, Cu(2) is bonded in a distorted square co-planar geometry to one O(1), one O(4), and two equivalent O(3) atoms. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one Cu(2) atom. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Mg(1), and two equivalent Cu(1) atoms to form OSr2Mg2Cu2 octahedra that share corners with four equivalent O(2)Sr2Mg2Cu2 octahedra and corners with two equivalent O(3)Sr2Cu3 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 0-1°. In the third O site, O(3) is bonded to two equivalent Sr(2), one Cu(1), and two equivalent Cu(2) atoms to form distorted OSr2Cu3 trigonal bipyramids that share  a cornercorner with one O(2)Sr2Mg2Cu2 octahedra, corners with six equivalent O(3)Sr2Cu3 trigonal bipyramids, and  an edgeedge with one O(3)Sr2Cu3 trigonal bipyramid. The corner-sharing octahedral tilt angles are 17°. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Sr(2) and two equivalent Cu(2) atoms.
Sr2Mg(Cu2O3)2 is Pb (Zr_0.50 Ti_0.48) O_3-derived structured and crystallizes in the orthorhombic Pmm2 space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form a mixture of corner and edge-sharing SrO6 octahedra. The corner-sharing octahedral tilt angles are 1°. Both Sr(1)-O(2) bond lengths are 2.38 Å. There are two shorter (2.46 Å) and two longer (2.48 Å) Sr(1)-O(1) bond lengths. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to two equivalent O(4) and four equivalent O(3) atoms. Both Sr(2)-O(4) bond lengths are 2.56 Å. There are two shorter (2.55 Å) and two longer (2.63 Å) Sr(2)-O(3) bond lengths. Mg(1) is bonded in a distorted linear geometry to two equivalent O(2) atoms. There is one shorter (1.97 Å) and one longer (2.14 Å) Mg(1)-O(2) bond length. There are two inequivalent Cu sites. In the first Cu site, Cu(1) is bonded in a distorted linear geometry to one O(2) and one O(3) atom. The Cu(1)-O(2) bond length is 1.99 Å. The Cu(1)-O(3) bond length is 1.78 Å. In the second Cu site, Cu(2) is bonded in a distorted square co-planar geometry to one O(1), one O(4), and two equivalent O(3) atoms. The Cu(2)-O(1) bond length is 1.85 Å. The Cu(2)-O(4) bond length is 1.85 Å. Both Cu(2)-O(3) bond lengths are 2.43 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one Cu(2) atom. In the second O site, O(2) is bonded to two equivalent Sr(1), two equivalent Mg(1), and two equivalent Cu(1) atoms to form OSr2Mg2Cu2 octahedra that share corners with four equivalent O(2)Sr2Mg2Cu2 octahedra and corners with two equivalent O(3)Sr2Cu3 trigonal bipyramids. The corner-sharing octahedral tilt angles range from 0-1°. In the third O site, O(3) is bonded to two equivalent Sr(2), one Cu(1), and two equivalent Cu(2) atoms to form distorted OSr2Cu3 trigonal bipyramids that share  a cornercorner with one O(2)Sr2Mg2Cu2 octahedra, corners with six equivalent O(3)Sr2Cu3 trigonal bipyramids, and  an edgeedge with one O(3)Sr2Cu3 trigonal bipyramid. The corner-sharing octahedral tilt angles are 17°. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Sr(2) and two equivalent Cu(2) atoms.