YBaMnCoO5 crystallizes in the tetragonal P4mm space group. Ba(1) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form distorted BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Mn(1)O5 square pyramids, and faces with four equivalent Co(1)O5 square pyramids. Y(1) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(3) atoms. Mn(1) is bonded to one O(1) and four equivalent O(3) atoms to form distorted MnO5 square pyramids that share  a cornercorner with one Co(1)O5 square pyramid, corners with four equivalent Mn(1)O5 square pyramids, and faces with four equivalent Ba(1)O12 cuboctahedra. Co(1) is bonded to one O(1) and four equivalent O(2) atoms to form CoO5 square pyramids that share  a cornercorner with one Mn(1)O5 square pyramid, corners with four equivalent Co(1)O5 square pyramids, and faces with four equivalent Ba(1)O12 cuboctahedra. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Ba(1), one Mn(1), and one Co(1) atom to form a mixture of corner and edge-sharing OBa4MnCo octahedra. The corner-sharing octahedral tilt angles are 7°. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Ba(1), two equivalent Y(1), and two equivalent Co(1) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Ba(1), two equivalent Y(1), and two equivalent Mn(1) atoms.
YBaMnCoO5 crystallizes in the tetragonal P4mm space group. Ba(1) is bonded to four equivalent O(1), four equivalent O(2), and four equivalent O(3) atoms to form distorted BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Mn(1)O5 square pyramids, and faces with four equivalent Co(1)O5 square pyramids. All Ba(1)-O(1) bond lengths are 2.78 Å. All Ba(1)-O(2) bond lengths are 3.05 Å. All Ba(1)-O(3) bond lengths are 3.28 Å. Y(1) is bonded in a body-centered cubic geometry to four equivalent O(2) and four equivalent O(3) atoms. All Y(1)-O(2) bond lengths are 2.41 Å. All Y(1)-O(3) bond lengths are 2.44 Å. Mn(1) is bonded to one O(1) and four equivalent O(3) atoms to form distorted MnO5 square pyramids that share  a cornercorner with one Co(1)O5 square pyramid, corners with four equivalent Mn(1)O5 square pyramids, and faces with four equivalent Ba(1)O12 cuboctahedra. The Mn(1)-O(1) bond length is 2.03 Å. All Mn(1)-O(3) bond lengths are 2.01 Å. Co(1) is bonded to one O(1) and four equivalent O(2) atoms to form CoO5 square pyramids that share  a cornercorner with one Mn(1)O5 square pyramid, corners with four equivalent Co(1)O5 square pyramids, and faces with four equivalent Ba(1)O12 cuboctahedra. The Co(1)-O(1) bond length is 2.13 Å. All Co(1)-O(2) bond lengths are 2.00 Å. There are three inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Ba(1), one Mn(1), and one Co(1) atom to form a mixture of corner and edge-sharing OBa4MnCo octahedra. The corner-sharing octahedral tilt angles are 7°. In the second O site, O(2) is bonded in a 4-coordinate geometry to two equivalent Ba(1), two equivalent Y(1), and two equivalent Co(1) atoms. In the third O site, O(3) is bonded in a 4-coordinate geometry to two equivalent Ba(1), two equivalent Y(1), and two equivalent Mn(1) atoms.