LiSr4Mn2(GaO5)2 crystallizes in the monoclinic C2/m space group. Li(1) is bonded in a square co-planar geometry to four equivalent O(3) atoms. Sr(1) is bonded in a 7-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. 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 four equivalent Mn(1)O6 octahedra and corners with two equivalent Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 0-11°. Ga(1) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form GaO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra and  an edgeedge with one Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. There are four inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Sr(1) and two equivalent Mn(1) atoms to form a mixture of distorted corner, edge, and face-sharing OSr4Mn2 octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded to four equivalent Sr(1) and two equivalent Mn(1) atoms to form a mixture of corner, edge, and face-sharing OSr4Mn2 octahedra. The corner-sharing octahedra are not tilted. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Li(1), two equivalent Sr(1), one Mn(1), and one Ga(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Sr(1) and two equivalent Ga(1) atoms.
LiSr4Mn2(GaO5)2 crystallizes in the monoclinic C2/m space group. Li(1) is bonded in a square co-planar geometry to four equivalent O(3) atoms. All Li(1)-O(3) bond lengths are 2.17 Å. Sr(1) is bonded in a 7-coordinate geometry to one O(4), two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. The Sr(1)-O(4) bond length is 2.50 Å. There is one shorter (2.63 Å) and one longer (2.69 Å) Sr(1)-O(1) bond length. Both Sr(1)-O(2) bond lengths are 2.63 Å. There is one shorter (2.60 Å) and one longer (2.62 Å) Sr(1)-O(3) bond length. 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 four equivalent Mn(1)O6 octahedra and corners with two equivalent Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles range from 0-11°. Both Mn(1)-O(1) bond lengths are 2.02 Å. Both Mn(1)-O(2) bond lengths are 2.04 Å. Both Mn(1)-O(3) bond lengths are 2.58 Å. Ga(1) is bonded to two equivalent O(3) and two equivalent O(4) atoms to form GaO4 tetrahedra that share corners with two equivalent Mn(1)O6 octahedra and  an edgeedge with one Ga(1)O4 tetrahedra. The corner-sharing octahedral tilt angles are 45°. Both Ga(1)-O(3) bond lengths are 1.85 Å. Both Ga(1)-O(4) bond lengths are 1.94 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Sr(1) and two equivalent Mn(1) atoms to form a mixture of distorted corner, edge, and face-sharing OSr4Mn2 octahedra. The corner-sharing octahedra are not tilted. In the second O site, O(2) is bonded to four equivalent Sr(1) and two equivalent Mn(1) atoms to form a mixture of corner, edge, and face-sharing OSr4Mn2 octahedra. The corner-sharing octahedra are not tilted. In the third O site, O(3) is bonded in a 5-coordinate geometry to one Li(1), two equivalent Sr(1), one Mn(1), and one Ga(1) atom. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Sr(1) and two equivalent Ga(1) atoms.