SrCr2O4 crystallizes in the orthorhombic Pmmn space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(3) atoms. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(3) atoms. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form edge-sharing CrO6 octahedra. In the second Cr site, Cr(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form edge-sharing CrO6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Cr(1), and two equivalent Cr(2) atoms to form distorted OSrCr3 trigonal pyramids that share corners with four equivalent O(3)Sr2Cr3 trigonal bipyramids, corners with three equivalent O(1)SrCr3 trigonal pyramids, corners with three equivalent O(2)SrCr3 trigonal pyramids, edges with four equivalent O(3)Sr2Cr3 trigonal bipyramids, and  an edgeedge with one O(2)SrCr3 trigonal pyramid. In the second O site, O(2) is bonded to one Sr(2), one Cr(1), and two equivalent Cr(2) atoms to form OSrCr3 trigonal pyramids that share corners with four equivalent O(3)Sr2Cr3 trigonal bipyramids, corners with three equivalent O(1)SrCr3 trigonal pyramids, corners with three equivalent O(2)SrCr3 trigonal pyramids, edges with four equivalent O(3)Sr2Cr3 trigonal bipyramids, and  an edgeedge with one O(1)SrCr3 trigonal pyramid. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), one Cr(2), and two equivalent Cr(1) atoms to form OSr2Cr3 trigonal bipyramids that share corners with five equivalent O(3)Sr2Cr3 trigonal bipyramids, corners with two equivalent O(1)SrCr3 trigonal pyramids, corners with two equivalent O(2)SrCr3 trigonal pyramids, edges with four equivalent O(3)Sr2Cr3 trigonal bipyramids, edges with two equivalent O(1)SrCr3 trigonal pyramids, and edges with two equivalent O(2)SrCr3 trigonal pyramids.
SrCr2O4 crystallizes in the orthorhombic Pmmn space group. There are two inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(3) atoms. Both Sr(1)-O(1) bond lengths are 2.43 Å. All Sr(1)-O(3) bond lengths are 2.56 Å. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(3) atoms. Both Sr(2)-O(2) bond lengths are 2.42 Å. All Sr(2)-O(3) bond lengths are 2.57 Å. There are two inequivalent Cr sites. In the first Cr site, Cr(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form edge-sharing CrO6 octahedra. The Cr(1)-O(1) bond length is 1.97 Å. The Cr(1)-O(2) bond length is 2.01 Å. There are two shorter (2.00 Å) and two longer (2.05 Å) Cr(1)-O(3) bond lengths. In the second Cr site, Cr(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form edge-sharing CrO6 octahedra. Both Cr(2)-O(1) bond lengths are 2.01 Å. Both Cr(2)-O(2) bond lengths are 1.98 Å. Both Cr(2)-O(3) bond lengths are 2.04 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Sr(1), one Cr(1), and two equivalent Cr(2) atoms to form distorted OSrCr3 trigonal pyramids that share corners with four equivalent O(3)Sr2Cr3 trigonal bipyramids, corners with three equivalent O(1)SrCr3 trigonal pyramids, corners with three equivalent O(2)SrCr3 trigonal pyramids, edges with four equivalent O(3)Sr2Cr3 trigonal bipyramids, and  an edgeedge with one O(2)SrCr3 trigonal pyramid. In the second O site, O(2) is bonded to one Sr(2), one Cr(1), and two equivalent Cr(2) atoms to form OSrCr3 trigonal pyramids that share corners with four equivalent O(3)Sr2Cr3 trigonal bipyramids, corners with three equivalent O(1)SrCr3 trigonal pyramids, corners with three equivalent O(2)SrCr3 trigonal pyramids, edges with four equivalent O(3)Sr2Cr3 trigonal bipyramids, and  an edgeedge with one O(1)SrCr3 trigonal pyramid. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), one Cr(2), and two equivalent Cr(1) atoms to form OSr2Cr3 trigonal bipyramids that share corners with five equivalent O(3)Sr2Cr3 trigonal bipyramids, corners with two equivalent O(1)SrCr3 trigonal pyramids, corners with two equivalent O(2)SrCr3 trigonal pyramids, edges with four equivalent O(3)Sr2Cr3 trigonal bipyramids, edges with two equivalent O(1)SrCr3 trigonal pyramids, and edges with two equivalent O(2)SrCr3 trigonal pyramids.