CaRh2O4 crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to one O(4), two equivalent O(2), and three equivalent O(3) atoms to form a mixture of corner and edge-sharing RhO6 octahedra. The corner-sharing octahedral tilt angles range from 50-62°. In the second Rh site, Rh(2) is bonded to one O(2), two equivalent O(4), and three equivalent O(1) atoms to form a mixture of corner and edge-sharing RhO6 octahedra. The corner-sharing octahedral tilt angles range from 50-62°. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1) and three equivalent Rh(2) atoms to form a mixture of distorted corner and edge-sharing OCa2Rh3 trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Ca(1), one Rh(2), and two equivalent Rh(1) atoms to form a mixture of distorted corner and edge-sharing OCa2Rh3 trigonal bipyramids. In the third O site, O(3) is bonded to two equivalent Ca(1) and three equivalent Rh(1) atoms to form a mixture of corner and edge-sharing OCa2Rh3 square pyramids. In the fourth O site, O(4) is bonded to two equivalent Ca(1), one Rh(1), and two equivalent Rh(2) atoms to form a mixture of distorted corner and edge-sharing OCa2Rh3 trigonal bipyramids.
CaRh2O4 crystallizes in the orthorhombic Pnma space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Ca(1)-O(1) bond lengths are 2.43 Å. There is one shorter (2.46 Å) and one longer (2.54 Å) Ca(1)-O(2) bond length. Both Ca(1)-O(3) bond lengths are 2.37 Å. Both Ca(1)-O(4) bond lengths are 2.45 Å. There are two inequivalent Rh sites. In the first Rh site, Rh(1) is bonded to one O(4), two equivalent O(2), and three equivalent O(3) atoms to form a mixture of corner and edge-sharing RhO6 octahedra. The corner-sharing octahedral tilt angles range from 50-62°. The Rh(1)-O(4) bond length is 2.09 Å. Both Rh(1)-O(2) bond lengths are 2.03 Å. There is one shorter (2.04 Å) and two longer (2.08 Å) Rh(1)-O(3) bond lengths. In the second Rh site, Rh(2) is bonded to one O(2), two equivalent O(4), and three equivalent O(1) atoms to form a mixture of corner and edge-sharing RhO6 octahedra. The corner-sharing octahedral tilt angles range from 50-62°. The Rh(2)-O(2) bond length is 2.05 Å. Both Rh(2)-O(4) bond lengths are 2.08 Å. All Rh(2)-O(1) bond lengths are 2.07 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1) and three equivalent Rh(2) atoms to form a mixture of distorted corner and edge-sharing OCa2Rh3 trigonal bipyramids. In the second O site, O(2) is bonded to two equivalent Ca(1), one Rh(2), and two equivalent Rh(1) atoms to form a mixture of distorted corner and edge-sharing OCa2Rh3 trigonal bipyramids. In the third O site, O(3) is bonded to two equivalent Ca(1) and three equivalent Rh(1) atoms to form a mixture of corner and edge-sharing OCa2Rh3 square pyramids. In the fourth O site, O(4) is bonded to two equivalent Ca(1), one Rh(1), and two equivalent Rh(2) atoms to form a mixture of distorted corner and edge-sharing OCa2Rh3 trigonal bipyramids.