CaMn2O5 crystallizes in the orthorhombic Cmcm space group. Ca(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Mn(1) is bonded to one O(1), one O(3), and three equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing MnO5 trigonal bipyramids. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1) and two equivalent Mn(1) atoms to form corner-sharing OCa2Mn2 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ca(1) and three equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Ca(1) and one Mn(1) atom.
CaMn2O5 crystallizes in the orthorhombic Cmcm space group. Ca(1) is bonded in a 6-coordinate geometry to two equivalent O(1), two equivalent O(2), and two equivalent O(3) atoms. Both Ca(1)-O(1) bond lengths are 2.32 Å. Both Ca(1)-O(2) bond lengths are 2.56 Å. Both Ca(1)-O(3) bond lengths are 2.21 Å. Mn(1) is bonded to one O(1), one O(3), and three equivalent O(2) atoms to form a mixture of distorted corner and edge-sharing MnO5 trigonal bipyramids. The Mn(1)-O(1) bond length is 1.91 Å. The Mn(1)-O(3) bond length is 1.71 Å. All Mn(1)-O(2) bond lengths are 1.98 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ca(1) and two equivalent Mn(1) atoms to form corner-sharing OCa2Mn2 tetrahedra. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Ca(1) and three equivalent Mn(1) atoms. In the third O site, O(3) is bonded in a bent 150 degrees geometry to one Ca(1) and one Mn(1) atom.