BaCu2O2 crystallizes in the tetragonal I4_1/amd space group. Ba(1) is bonded to six equivalent O(1) atoms to form a mixture of corner and edge-sharing BaO6 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 Ba(1) and two equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OBa3Cu2 trigonal bipyramids.
BaCu2O2 crystallizes in the tetragonal I4_1/amd space group. Ba(1) is bonded to six equivalent O(1) atoms to form a mixture of corner and edge-sharing BaO6 octahedra. The corner-sharing octahedral tilt angles are 5°. There are two shorter (2.66 Å) and four longer (2.87 Å) Ba(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 1.83 Å. O(1) is bonded to three equivalent Ba(1) and two equivalent Cu(1) atoms to form a mixture of distorted corner and edge-sharing OBa3Cu2 trigonal bipyramids.