Sr2ErMoO6 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(1), three equivalent O(2), and three equivalent O(3) atoms. Er(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form ErO6 octahedra that share corners with six equivalent Mo(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-27°. Mo(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MoO6 octahedra that share corners with six equivalent Er(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-27°. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Er(1), and one Mo(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Er(1), and one Mo(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Er(1), and one Mo(1) atom.
Sr2ErMoO6 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(1), three equivalent O(2), and three equivalent O(3) atoms. There is one shorter (2.52 Å) and one longer (2.64 Å) Sr(1)-O(1) bond length. There are a spread of Sr(1)-O(2) bond distances ranging from 2.55-2.87 Å. There are a spread of Sr(1)-O(3) bond distances ranging from 2.59-2.90 Å. Er(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form ErO6 octahedra that share corners with six equivalent Mo(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-27°. Both Er(1)-O(1) bond lengths are 2.22 Å. Both Er(1)-O(2) bond lengths are 2.21 Å. Both Er(1)-O(3) bond lengths are 2.27 Å. Mo(1) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form MoO6 octahedra that share corners with six equivalent Er(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 24-27°. Both Mo(1)-O(1) bond lengths are 2.04 Å. Both Mo(1)-O(2) bond lengths are 2.04 Å. Both Mo(1)-O(3) bond lengths are 1.96 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Er(1), and one Mo(1) atom. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Er(1), and one Mo(1) atom. In the third O site, O(3) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Er(1), and one Mo(1) atom.