SrGa4O7 crystallizes in the monoclinic C2/c 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 Ga sites. In the first Ga site, Ga(1) is bonded to one O(2), one O(4), and two equivalent O(3) atoms to form corner-sharing GaO4 tetrahedra. In the second Ga site, Ga(2) is bonded to one O(1), one O(2), and two equivalent O(4) atoms to form corner-sharing GaO4 tetrahedra. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Sr(1) and two equivalent Ga(2) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Sr(1), one Ga(1), and one Ga(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1) and two equivalent Ga(1) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Ga(1) and two equivalent Ga(2) atoms.
SrGa4O7 crystallizes in the monoclinic C2/c 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 2.57 Å. Both Sr(1)-O(2) bond lengths are 2.49 Å. There are two shorter (2.53 Å) and two longer (2.94 Å) Sr(1)-O(3) bond lengths. There are two inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(2), one O(4), and two equivalent O(3) atoms to form corner-sharing GaO4 tetrahedra. The Ga(1)-O(2) bond length is 1.82 Å. The Ga(1)-O(4) bond length is 1.88 Å. There is one shorter (1.83 Å) and one longer (1.86 Å) Ga(1)-O(3) bond length. In the second Ga site, Ga(2) is bonded to one O(1), one O(2), and two equivalent O(4) atoms to form corner-sharing GaO4 tetrahedra. The Ga(2)-O(1) bond length is 1.83 Å. The Ga(2)-O(2) bond length is 1.80 Å. There is one shorter (1.88 Å) and one longer (1.89 Å) Ga(2)-O(4) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to one Sr(1) and two equivalent Ga(2) atoms. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Sr(1), one Ga(1), and one Ga(2) atom. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1) and two equivalent Ga(1) atoms. In the fourth O site, O(4) is bonded in a trigonal planar geometry to one Ga(1) and two equivalent Ga(2) atoms.