Sr2YMo2O7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(4) atoms. Y(1) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(3) atoms. Mo(1) is bonded to one O(4), two equivalent O(2), and two equivalent O(3) atoms to form distorted corner-sharing MoO5 trigonal bipyramids. There are four inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to four equivalent Sr(1) atoms. In the second O site, O(2) is bonded to two equivalent Y(1) and two equivalent Mo(1) atoms to form a mixture of corner and edge-sharing OY2Mo2 tetrahedra. In the third O site, O(3) is bonded to two equivalent Y(1) and two equivalent Mo(1) atoms to form a mixture of corner and edge-sharing OY2Mo2 tetrahedra. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Sr(1) and one Mo(1) atom.
Sr2YMo2O7 crystallizes in the orthorhombic Ima2 space group. Sr(1) is bonded in a rectangular see-saw-like geometry to two equivalent O(1) and two equivalent O(4) atoms. There is one shorter (2.38 Å) and one longer (2.43 Å) Sr(1)-O(1) bond length. There is one shorter (2.46 Å) and one longer (2.56 Å) Sr(1)-O(4) bond length. Y(1) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(3) atoms. There are two shorter (2.40 Å) and two longer (2.49 Å) Y(1)-O(2) bond lengths. There are two shorter (2.37 Å) and two longer (2.47 Å) Y(1)-O(3) bond lengths. Mo(1) is bonded to one O(4), two equivalent O(2), and two equivalent O(3) atoms to form distorted corner-sharing MoO5 trigonal bipyramids. The Mo(1)-O(4) bond length is 1.95 Å. There is one shorter (2.08 Å) and one longer (2.11 Å) Mo(1)-O(2) bond length. There is one shorter (2.02 Å) and one longer (2.20 Å) Mo(1)-O(3) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded in a square co-planar geometry to four equivalent Sr(1) atoms. In the second O site, O(2) is bonded to two equivalent Y(1) and two equivalent Mo(1) atoms to form a mixture of corner and edge-sharing OY2Mo2 tetrahedra. In the third O site, O(3) is bonded to two equivalent Y(1) and two equivalent Mo(1) atoms to form a mixture of corner and edge-sharing OY2Mo2 tetrahedra. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Sr(1) and one Mo(1) atom.