Sr2MnGaO5 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(1), three equivalent O(2), and four equivalent O(3) atoms. Mn(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form MnO6 octahedra that share corners with four equivalent Mn(1)O6 octahedra and corners with two equivalent Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 6°. Ga(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form GaO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with two equivalent Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 31°. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1) and two equivalent Ga(1) atoms to form distorted OSr2Ga2 tetrahedra that share corners with eight equivalent O(3)Sr4Mn2 octahedra and corners with two equivalent O(1)Sr2Ga2 tetrahedra. The corner-sharing octahedral tilt angles range from 20-74°. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Mn(1), and one Ga(1) atom. In the third O site, O(3) is bonded to four equivalent Sr(1) and two equivalent Mn(1) atoms to form distorted OSr4Mn2 octahedra that share corners with two equivalent O(3)Sr4Mn2 octahedra, corners with four equivalent O(1)Sr2Ga2 tetrahedra, edges with two equivalent O(3)Sr4Mn2 octahedra, and faces with four equivalent O(3)Sr4Mn2 octahedra. The corner-sharing octahedral tilt angles are 1°.
Sr2MnGaO5 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(1), three equivalent O(2), and four equivalent O(3) atoms. The Sr(1)-O(1) bond length is 2.47 Å. There are a spread of Sr(1)-O(2) bond distances ranging from 2.50-2.91 Å. There are a spread of Sr(1)-O(3) bond distances ranging from 2.66-2.71 Å. Mn(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form MnO6 octahedra that share corners with four equivalent Mn(1)O6 octahedra and corners with two equivalent Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 6°. Both Mn(1)-O(2) bond lengths are 2.40 Å. There are two shorter (1.95 Å) and two longer (1.96 Å) Mn(1)-O(3) bond lengths. Ga(1) is bonded to two equivalent O(1) and two equivalent O(2) atoms to form GaO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with two equivalent Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 31°. There is one shorter (1.90 Å) and one longer (1.91 Å) Ga(1)-O(1) bond length. Both Ga(1)-O(2) bond lengths are 1.86 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1) and two equivalent Ga(1) atoms to form distorted OSr2Ga2 tetrahedra that share corners with eight equivalent O(3)Sr4Mn2 octahedra and corners with two equivalent O(1)Sr2Ga2 tetrahedra. The corner-sharing octahedral tilt angles range from 20-74°. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Sr(1), one Mn(1), and one Ga(1) atom. In the third O site, O(3) is bonded to four equivalent Sr(1) and two equivalent Mn(1) atoms to form distorted OSr4Mn2 octahedra that share corners with two equivalent O(3)Sr4Mn2 octahedra, corners with four equivalent O(1)Sr2Ga2 tetrahedra, edges with two equivalent O(3)Sr4Mn2 octahedra, and faces with four equivalent O(3)Sr4Mn2 octahedra. The corner-sharing octahedral tilt angles are 1°.