Ba9Cu6O15Cl2Cu crystallizes in the hexagonal P6/mmm space group. The structure consists of one 7440-50-8 atom inside a Ba9Cu6O15Cl2 framework. In the Ba9Cu6O15Cl2 framework, there are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. In the second Ba site, Ba(2) is bonded to two equivalent O(2), four equivalent O(1), and two equivalent Cl(1) atoms to form corner-sharing BaCl2O6 hexagonal bipyramids. Cu(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Ba(2), two equivalent Ba(1), and two equivalent Cu(1) atoms to form distorted OBa3Cu2 square pyramids that share corners with three equivalent O(2)Ba6 octahedra, corners with six equivalent O(1)Ba3Cu2 square pyramids, edges with three equivalent O(1)Ba3Cu2 square pyramids,  a faceface with one O(2)Ba6 octahedra, and  a faceface with one O(1)Ba3Cu2 square pyramid. The corner-sharing octahedral tilt angles range from 47-64°. In the second O site, O(2) is bonded to two equivalent Ba(2) and four equivalent Ba(1) atoms to form OBa6 octahedra that share corners with six equivalent O(2)Ba6 octahedra, corners with twelve equivalent O(1)Ba3Cu2 square pyramids, and faces with four equivalent O(1)Ba3Cu2 square pyramids. The corner-sharing octahedral tilt angles range from 0-37°. Cl(1) is bonded in a trigonal planar geometry to three equivalent Ba(2) atoms.
Ba9Cu6O15Cl2Cu crystallizes in the hexagonal P6/mmm space group. The structure consists of one 7440-50-8 atom inside a Ba9Cu6O15Cl2 framework. In the Ba9Cu6O15Cl2 framework, there are two inequivalent Ba sites. In the first Ba site, Ba(1) is bonded in a 6-coordinate geometry to two equivalent O(2) and four equivalent O(1) atoms. Both Ba(1)-O(2) bond lengths are 2.89 Å. All Ba(1)-O(1) bond lengths are 2.65 Å. In the second Ba site, Ba(2) is bonded to two equivalent O(2), four equivalent O(1), and two equivalent Cl(1) atoms to form corner-sharing BaCl2O6 hexagonal bipyramids. Both Ba(2)-O(2) bond lengths are 3.06 Å. All Ba(2)-O(1) bond lengths are 2.88 Å. Both Ba(2)-Cl(1) bond lengths are 3.17 Å. Cu(1) is bonded in a square co-planar geometry to four equivalent O(1) atoms. All Cu(1)-O(1) bond lengths are 1.94 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to one Ba(2), two equivalent Ba(1), and two equivalent Cu(1) atoms to form distorted OBa3Cu2 square pyramids that share corners with three equivalent O(2)Ba6 octahedra, corners with six equivalent O(1)Ba3Cu2 square pyramids, edges with three equivalent O(1)Ba3Cu2 square pyramids,  a faceface with one O(2)Ba6 octahedra, and  a faceface with one O(1)Ba3Cu2 square pyramid. The corner-sharing octahedral tilt angles range from 47-64°. In the second O site, O(2) is bonded to two equivalent Ba(2) and four equivalent Ba(1) atoms to form OBa6 octahedra that share corners with six equivalent O(2)Ba6 octahedra, corners with twelve equivalent O(1)Ba3Cu2 square pyramids, and faces with four equivalent O(1)Ba3Cu2 square pyramids. The corner-sharing octahedral tilt angles range from 0-37°. Cl(1) is bonded in a trigonal planar geometry to three equivalent Ba(2) atoms.