Sr2Y2V2O7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), and four equivalent O(4) atoms. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 8-coordinate geometry to four equivalent O(2) and four equivalent O(3) atoms. In the second Y site, Y(2) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form distorted YO4 tetrahedra that share corners with two equivalent V(1)O5 square pyramids and corners with two equivalent Y(2)O4 tetrahedra. V(1) is bonded to one O(4), two equivalent O(2), and two equivalent O(3) atoms to form VO5 square pyramids that share corners with four equivalent V(1)O5 square pyramids and  a cornercorner with one Y(2)O4 tetrahedra. There are four inequivalent O sites. In the first O site, O(4) is bonded in a 6-coordinate geometry to four equivalent Sr(1), one Y(2), and one V(1) atom. In the second O site, O(1) is bonded to two equivalent Sr(1) and two equivalent Y(2) atoms to form distorted corner-sharing OSr2Y2 tetrahedra. In the third O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Y(1), and two equivalent V(1) atoms. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1), two equivalent Y(1), and two equivalent V(1) atoms.
Sr2Y2V2O7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 9-coordinate geometry to one O(1), two equivalent O(2), two equivalent O(3), and four equivalent O(4) atoms. The Sr(1)-O(1) bond length is 2.64 Å. There is one shorter (2.57 Å) and one longer (2.94 Å) Sr(1)-O(2) bond length. There is one shorter (2.51 Å) and one longer (3.15 Å) Sr(1)-O(3) bond length. There are a spread of Sr(1)-O(4) bond distances ranging from 2.56-3.27 Å. There are two inequivalent Y sites. In the first Y site, Y(1) is bonded in a 8-coordinate geometry to four equivalent O(2) and four equivalent O(3) atoms. There are two shorter (2.28 Å) and two longer (2.77 Å) Y(1)-O(2) bond lengths. There are two shorter (2.28 Å) and two longer (2.90 Å) Y(1)-O(3) bond lengths. In the second Y site, Y(2) is bonded to two equivalent O(1) and two equivalent O(4) atoms to form distorted YO4 tetrahedra that share corners with two equivalent V(1)O5 square pyramids and corners with two equivalent Y(2)O4 tetrahedra. There is one shorter (2.19 Å) and one longer (2.22 Å) Y(2)-O(1) bond length. Both Y(2)-O(4) bond lengths are 2.17 Å. V(1) is bonded to one O(4), two equivalent O(2), and two equivalent O(3) atoms to form VO5 square pyramids that share corners with four equivalent V(1)O5 square pyramids and  a cornercorner with one Y(2)O4 tetrahedra. The V(1)-O(4) bond length is 2.26 Å. There is one shorter (2.04 Å) and one longer (2.05 Å) V(1)-O(2) bond length. Both V(1)-O(3) bond lengths are 2.05 Å. There are four inequivalent O sites. In the first O site, O(4) is bonded in a 6-coordinate geometry to four equivalent Sr(1), one Y(2), and one V(1) atom. In the second O site, O(1) is bonded to two equivalent Sr(1) and two equivalent Y(2) atoms to form distorted corner-sharing OSr2Y2 tetrahedra. In the third O site, O(2) is bonded in a 6-coordinate geometry to two equivalent Sr(1), two equivalent Y(1), and two equivalent V(1) atoms. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Sr(1), two equivalent Y(1), and two equivalent V(1) atoms.