Sr2Y2Cr2O7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), two equivalent O(2), and two 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 YO4 tetrahedra that share corners with two equivalent Cr(1)O5 square pyramids and corners with two equivalent Y(2)O4 tetrahedra. Cr(1) is bonded to one O(4), two equivalent O(2), and two equivalent O(3) atoms to form CrO5 square pyramids that share corners with four equivalent Cr(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 4-coordinate geometry to two equivalent Sr(1), one Y(2), and one Cr(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 Cr(1) atoms. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Y(1), and two equivalent Cr(1) atoms.
Sr2Y2Cr2O7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a 5-coordinate geometry to one O(1), one O(3), two equivalent O(2), and two equivalent O(4) atoms. The Sr(1)-O(1) bond length is 2.69 Å. The Sr(1)-O(3) bond length is 2.59 Å. There is one shorter (2.67 Å) and one longer (2.99 Å) Sr(1)-O(2) bond length. There is one shorter (2.50 Å) and one longer (2.58 Å) Sr(1)-O(4) bond length. 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 (2.26 Å) and two longer (2.71 Å) Y(1)-O(2) bond lengths. There are two shorter (2.26 Å) and two longer (2.87 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 YO4 tetrahedra that share corners with two equivalent Cr(1)O5 square pyramids and corners with two equivalent Y(2)O4 tetrahedra. There is one shorter (2.19 Å) and one longer (2.21 Å) Y(2)-O(1) bond length. Both Y(2)-O(4) bond lengths are 2.15 Å. Cr(1) is bonded to one O(4), two equivalent O(2), and two equivalent O(3) atoms to form CrO5 square pyramids that share corners with four equivalent Cr(1)O5 square pyramids and  a cornercorner with one Y(2)O4 tetrahedra. The Cr(1)-O(4) bond length is 2.39 Å. There is one shorter (2.04 Å) and one longer (2.06 Å) Cr(1)-O(2) bond length. There is one shorter (2.03 Å) and one longer (2.04 Å) Cr(1)-O(3) bond length. There are four inequivalent O sites. In the first O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Y(2), and one Cr(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 Cr(1) atoms. In the fourth O site, O(3) is bonded in a 4-coordinate geometry to one Sr(1), two equivalent Y(1), and two equivalent Cr(1) atoms.