SrRh2O4 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(2) and four equivalent O(3) atoms. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(3) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form edge-sharing RhO6 octahedra. In the second Rh site, Rh(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form edge-sharing RhO6 octahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Sr(2), one Rh(1), and two equivalent Rh(2) atoms to form OSrRh3 trigonal pyramids that share corners with four equivalent O(3)Sr2Rh3 trigonal bipyramids, corners with three equivalent O(1)SrRh3 trigonal pyramids, and edges with four equivalent O(3)Sr2Rh3 trigonal bipyramids. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Sr(1), one Rh(1), and two equivalent Rh(2) atoms. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), one Rh(2), and two equivalent Rh(1) atoms to form OSr2Rh3 trigonal bipyramids that share corners with five equivalent O(3)Sr2Rh3 trigonal bipyramids, corners with two equivalent O(1)SrRh3 trigonal pyramids, edges with four equivalent O(3)Sr2Rh3 trigonal bipyramids, and edges with two equivalent O(1)SrRh3 trigonal pyramids.
SrRh2O4 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(2) and four equivalent O(3) atoms. Both Sr(1)-O(2) bond lengths are 2.43 Å. All Sr(1)-O(3) bond lengths are 2.58 Å. In the second Sr site, Sr(2) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(3) atoms. Both Sr(2)-O(1) bond lengths are 2.44 Å. All Sr(2)-O(3) bond lengths are 2.57 Å. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to one O(1), one O(2), and four equivalent O(3) atoms to form edge-sharing RhO6 octahedra. The Rh(1)-O(1) bond length is 2.06 Å. The Rh(1)-O(2) bond length is 2.04 Å. There are two shorter (2.07 Å) and two longer (2.09 Å) Rh(1)-O(3) bond lengths. In the second Rh site, Rh(2) is bonded to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms to form edge-sharing RhO6 octahedra. Both Rh(2)-O(1) bond lengths are 2.04 Å. Both Rh(2)-O(2) bond lengths are 2.07 Å. Both Rh(2)-O(3) bond lengths are 2.08 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to one Sr(2), one Rh(1), and two equivalent Rh(2) atoms to form OSrRh3 trigonal pyramids that share corners with four equivalent O(3)Sr2Rh3 trigonal bipyramids, corners with three equivalent O(1)SrRh3 trigonal pyramids, and edges with four equivalent O(3)Sr2Rh3 trigonal bipyramids. In the second O site, O(2) is bonded in a rectangular see-saw-like geometry to one Sr(1), one Rh(1), and two equivalent Rh(2) atoms. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), one Rh(2), and two equivalent Rh(1) atoms to form OSr2Rh3 trigonal bipyramids that share corners with five equivalent O(3)Sr2Rh3 trigonal bipyramids, corners with two equivalent O(1)SrRh3 trigonal pyramids, edges with four equivalent O(3)Sr2Rh3 trigonal bipyramids, and edges with two equivalent O(1)SrRh3 trigonal pyramids.