Sr2In2O5 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(2), and four equivalent O(3) atoms. There are two inequivalent In sites. In the first In site, In(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form InO6 octahedra that share corners with four equivalent In(1)O6 octahedra and corners with two equivalent In(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 15°. In the second In site, In(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form InO4 tetrahedra that share corners with two equivalent In(1)O6 octahedra and corners with two equivalent In(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1) and two equivalent In(2) atoms to form distorted OSr2In2 tetrahedra that share corners with eight equivalent O(3)Sr4In2 octahedra and corners with two equivalent O(1)Sr2In2 tetrahedra. The corner-sharing octahedral tilt angles range from 19-84°. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one In(1), and one In(2) atom. In the third O site, O(3) is bonded to four equivalent Sr(1) and two equivalent In(1) atoms to form distorted OSr4In2 octahedra that share corners with two equivalent O(3)Sr4In2 octahedra, corners with four equivalent O(1)Sr2In2 tetrahedra, edges with two equivalent O(3)Sr4In2 octahedra, and faces with four equivalent O(3)Sr4In2 octahedra. The corner-sharing octahedral tilt angles are 2°.
Sr2In2O5 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 7-coordinate geometry to one O(1), two equivalent O(2), and four equivalent O(3) atoms. The Sr(1)-O(1) bond length is 2.54 Å. There is one shorter (2.49 Å) and one longer (2.66 Å) Sr(1)-O(2) bond length. There are a spread of Sr(1)-O(3) bond distances ranging from 2.66-2.86 Å. There are two inequivalent In sites. In the first In site, In(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form InO6 octahedra that share corners with four equivalent In(1)O6 octahedra and corners with two equivalent In(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 15°. Both In(1)-O(2) bond lengths are 2.29 Å. There are two shorter (2.14 Å) and two longer (2.17 Å) In(1)-O(3) bond lengths. In the second In site, In(2) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form InO4 tetrahedra that share corners with two equivalent In(1)O6 octahedra and corners with two equivalent In(2)O4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. Both In(2)-O(1) bond lengths are 2.14 Å. Both In(2)-O(2) bond lengths are 2.05 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1) and two equivalent In(2) atoms to form distorted OSr2In2 tetrahedra that share corners with eight equivalent O(3)Sr4In2 octahedra and corners with two equivalent O(1)Sr2In2 tetrahedra. The corner-sharing octahedral tilt angles range from 19-84°. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one In(1), and one In(2) atom. In the third O site, O(3) is bonded to four equivalent Sr(1) and two equivalent In(1) atoms to form distorted OSr4In2 octahedra that share corners with two equivalent O(3)Sr4In2 octahedra, corners with four equivalent O(1)Sr2In2 tetrahedra, edges with two equivalent O(3)Sr4In2 octahedra, and faces with four equivalent O(3)Sr4In2 octahedra. The corner-sharing octahedral tilt angles are 2°.