SrYGa3O7 crystallizes in the orthorhombic Cmm2 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. Y(1) is bonded in a 8-coordinate geometry to one O(2), one O(4), two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(2), one O(3), and two equivalent O(5) atoms to form distorted corner-sharing GaO4 tetrahedra. In the second Ga site, Ga(2) is bonded to one O(1), one O(4), and two equivalent O(6) atoms to form corner-sharing GaO4 tetrahedra. In the third Ga site, Ga(3) is bonded to two equivalent O(5) and two equivalent O(6) atoms to form corner-sharing GaO4 tetrahedra. There are six inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1) and two equivalent Ga(2) atoms to form distorted OSr2Ga2 tetrahedra that share corners with two equivalent O(4)Sr2YGa tetrahedra, corners with two equivalent O(3)SrY2Ga tetrahedra, and edges with two equivalent O(4)Sr2YGa tetrahedra. In the second O site, O(2) is bonded to two equivalent Y(1) and two equivalent Ga(1) atoms to form OY2Ga2 tetrahedra that share corners with two equivalent O(4)Sr2YGa tetrahedra, corners with two equivalent O(3)SrY2Ga tetrahedra, and edges with two equivalent O(3)SrY2Ga tetrahedra. In the third O site, O(3) is bonded to one Sr(1), two equivalent Y(1), and one Ga(1) atom to form distorted OSrY2Ga tetrahedra that share  a cornercorner with one O(1)Sr2Ga2 tetrahedra,  a cornercorner with one O(2)Y2Ga2 tetrahedra, corners with four equivalent O(4)Sr2YGa tetrahedra,  an edgeedge with one O(3)SrY2Ga tetrahedra, and  an edgeedge with one O(2)Y2Ga2 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Sr(1), one Y(1), and one Ga(2) atom to form distorted OSr2YGa tetrahedra that share  a cornercorner with one O(1)Sr2Ga2 tetrahedra,  a cornercorner with one O(2)Y2Ga2 tetrahedra, corners with four equivalent O(3)SrY2Ga tetrahedra,  an edgeedge with one O(1)Sr2Ga2 tetrahedra, and  an edgeedge with one O(4)Sr2YGa tetrahedra. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(1), one Y(1), one Ga(1), and one Ga(3) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(1), one Y(1), one Ga(2), and one Ga(3) atom.
SrYGa3O7 crystallizes in the orthorhombic Cmm2 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(3), two equivalent O(4), two equivalent O(5), and two equivalent O(6) atoms. The Sr(1)-O(1) bond length is 2.57 Å. The Sr(1)-O(3) bond length is 2.68 Å. Both Sr(1)-O(4) bond lengths are 2.76 Å. Both Sr(1)-O(5) bond lengths are 2.55 Å. Both Sr(1)-O(6) bond lengths are 2.97 Å. Y(1) is bonded in a 8-coordinate geometry to one O(2), one O(4), two equivalent O(3), two equivalent O(5), and two equivalent O(6) atoms. The Y(1)-O(2) bond length is 2.38 Å. The Y(1)-O(4) bond length is 2.31 Å. Both Y(1)-O(3) bond lengths are 2.46 Å. Both Y(1)-O(5) bond lengths are 2.94 Å. Both Y(1)-O(6) bond lengths are 2.37 Å. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded to one O(2), one O(3), and two equivalent O(5) atoms to form distorted corner-sharing GaO4 tetrahedra. The Ga(1)-O(2) bond length is 1.88 Å. The Ga(1)-O(3) bond length is 1.83 Å. Both Ga(1)-O(5) bond lengths are 1.86 Å. In the second Ga site, Ga(2) is bonded to one O(1), one O(4), and two equivalent O(6) atoms to form corner-sharing GaO4 tetrahedra. The Ga(2)-O(1) bond length is 1.84 Å. The Ga(2)-O(4) bond length is 1.81 Å. Both Ga(2)-O(6) bond lengths are 1.89 Å. In the third Ga site, Ga(3) is bonded to two equivalent O(5) and two equivalent O(6) atoms to form corner-sharing GaO4 tetrahedra. Both Ga(3)-O(5) bond lengths are 1.84 Å. Both Ga(3)-O(6) bond lengths are 1.87 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Sr(1) and two equivalent Ga(2) atoms to form distorted OSr2Ga2 tetrahedra that share corners with two equivalent O(4)Sr2YGa tetrahedra, corners with two equivalent O(3)SrY2Ga tetrahedra, and edges with two equivalent O(4)Sr2YGa tetrahedra. In the second O site, O(2) is bonded to two equivalent Y(1) and two equivalent Ga(1) atoms to form OY2Ga2 tetrahedra that share corners with two equivalent O(4)Sr2YGa tetrahedra, corners with two equivalent O(3)SrY2Ga tetrahedra, and edges with two equivalent O(3)SrY2Ga tetrahedra. In the third O site, O(3) is bonded to one Sr(1), two equivalent Y(1), and one Ga(1) atom to form distorted OSrY2Ga tetrahedra that share  a cornercorner with one O(1)Sr2Ga2 tetrahedra,  a cornercorner with one O(2)Y2Ga2 tetrahedra, corners with four equivalent O(4)Sr2YGa tetrahedra,  an edgeedge with one O(3)SrY2Ga tetrahedra, and  an edgeedge with one O(2)Y2Ga2 tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Sr(1), one Y(1), and one Ga(2) atom to form distorted OSr2YGa tetrahedra that share  a cornercorner with one O(1)Sr2Ga2 tetrahedra,  a cornercorner with one O(2)Y2Ga2 tetrahedra, corners with four equivalent O(3)SrY2Ga tetrahedra,  an edgeedge with one O(1)Sr2Ga2 tetrahedra, and  an edgeedge with one O(4)Sr2YGa tetrahedra. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Sr(1), one Y(1), one Ga(1), and one Ga(3) atom. In the sixth O site, O(6) is bonded in a 4-coordinate geometry to one Sr(1), one Y(1), one Ga(2), and one Ga(3) atom.