Sr2UMnO6 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(2), three equivalent O(1), and three equivalent O(3) atoms. U(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form UO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-28°. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent U(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-28°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one U(1), and one Mn(1) atom. In the second O site, O(2) is bonded to two equivalent Sr(1), one U(1), and one Mn(1) atom to form distorted corner-sharing OSr2UMn tetrahedra. In the third O site, O(3) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one U(1), and one Mn(1) atom.
Sr2UMnO6 is Orthorhombic Perovskite-derived structured and crystallizes in the monoclinic P2_1/c space group. Sr(1) is bonded in a 8-coordinate geometry to two equivalent O(2), three equivalent O(1), and three equivalent O(3) atoms. There is one shorter (2.53 Å) and one longer (2.64 Å) Sr(1)-O(2) bond length. There are a spread of Sr(1)-O(1) bond distances ranging from 2.55-2.91 Å. There are a spread of Sr(1)-O(3) bond distances ranging from 2.55-2.96 Å. U(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form UO6 octahedra that share corners with six equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-28°. Both U(1)-O(1) bond lengths are 2.10 Å. Both U(1)-O(2) bond lengths are 2.10 Å. Both U(1)-O(3) bond lengths are 2.10 Å. Mn(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MnO6 octahedra that share corners with six equivalent U(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 27-28°. Both Mn(1)-O(1) bond lengths are 2.22 Å. Both Mn(1)-O(2) bond lengths are 2.21 Å. Both Mn(1)-O(3) bond lengths are 2.22 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one U(1), and one Mn(1) atom. In the second O site, O(2) is bonded to two equivalent Sr(1), one U(1), and one Mn(1) atom to form distorted corner-sharing OSr2UMn tetrahedra. In the third O site, O(3) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one U(1), and one Mn(1) atom.