CaCu2O2 crystallizes in the tetragonal I4_1/amd space group. Ca(1) is bonded to six equivalent O(1) atoms to form a mixture of edge and corner-sharing CaO6 octahedra. The corner-sharing octahedral tilt angles are 5°. Cu(1) is bonded in a linear geometry to two equivalent O(1) atoms. O(1) is bonded to three equivalent Ca(1) and two equivalent Cu(1) atoms to form a mixture of distorted edge and corner-sharing OCa3Cu2 trigonal bipyramids.
CaCu2O2 crystallizes in the tetragonal I4_1/amd space group. Ca(1) is bonded to six equivalent O(1) atoms to form a mixture of edge and corner-sharing CaO6 octahedra. The corner-sharing octahedral tilt angles are 5°. There are two shorter (2.27 Å) and four longer (2.67 Å) Ca(1)-O(1) bond lengths. Cu(1) is bonded in a linear geometry to two equivalent O(1) atoms. Both Cu(1)-O(1) bond lengths are 1.86 Å. O(1) is bonded to three equivalent Ca(1) and two equivalent Cu(1) atoms to form a mixture of distorted edge and corner-sharing OCa3Cu2 trigonal bipyramids.