CaMn2O5 crystallizes in the orthorhombic Pmmn space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four 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 in a 4-coordinate geometry to two equivalent Ca(1) and two equivalent Mn(1) atoms. 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 distorted trigonal non-coplanar geometry to two equivalent Ca(1) and one Mn(1) atom.
CaMn2O5 crystallizes in the orthorhombic Pmmn space group. Ca(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. Both Ca(1)-O(1) bond lengths are 2.47 Å. Both Ca(1)-O(2) bond lengths are 2.68 Å. All Ca(1)-O(3) bond lengths are 2.45 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 1.87 Å. The Mn(1)-O(3) bond length is 1.74 Å. There are two shorter (1.92 Å) and one longer (1.99 Å) Mn(1)-O(2) bond length. There are three inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Ca(1) and two equivalent Mn(1) atoms. 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 distorted trigonal non-coplanar geometry to two equivalent Ca(1) and one Mn(1) atom.