BaHo(CoO3)2 crystallizes in the orthorhombic Pmmm space group. Ba(1) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(5), two equivalent O(6), and four equivalent O(7) atoms to form BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, corners with eight equivalent Ho(1)O12 cuboctahedra, faces with two equivalent Ho(1)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Co(1)O6 octahedra, and faces with four equivalent Co(2)O6 octahedra. Ho(1) is bonded to two equivalent O(3), two equivalent O(4), two equivalent O(5), two equivalent O(6), and four equivalent O(7) atoms to form HoO12 cuboctahedra that share corners with four equivalent Ho(1)O12 cuboctahedra, corners with eight equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Ho(1)O12 cuboctahedra, faces with four equivalent Co(1)O6 octahedra, and faces with four equivalent Co(2)O6 octahedra. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(2), one O(3), two equivalent O(6), and two equivalent O(7) atoms to form CoO6 octahedra that share corners with two equivalent Co(2)O6 octahedra, corners with four equivalent Co(1)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ho(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-14°. In the second Co site, Co(2) is bonded to one O(1), one O(4), two equivalent O(5), and two equivalent O(7) atoms to form CoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with four equivalent Co(2)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ho(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-16°. There are seven inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Ba(1) and two equivalent Co(2) atoms to form a mixture of corner and edge-sharing OBa4Co2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second O site, O(2) is bonded to four equivalent Ba(1) and two equivalent Co(1) atoms to form a mixture of corner and edge-sharing OBa4Co2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the third O site, O(3) is bonded in a linear geometry to four equivalent Ho(1) and two equivalent Co(1) atoms. In the fourth O site, O(4) is bonded in a distorted linear geometry to four equivalent Ho(1) and two equivalent Co(2) atoms. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Ho(1), and two equivalent Co(2) atoms. In the sixth O site, O(6) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ho(1), and two equivalent Co(1) atoms. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Ho(1), one Co(1), and one Co(2) atom.
BaHo(CoO3)2 crystallizes in the orthorhombic Pmmm space group. Ba(1) is bonded to two equivalent O(1), two equivalent O(2), two equivalent O(5), two equivalent O(6), and four equivalent O(7) atoms to form BaO12 cuboctahedra that share corners with four equivalent Ba(1)O12 cuboctahedra, corners with eight equivalent Ho(1)O12 cuboctahedra, faces with two equivalent Ho(1)O12 cuboctahedra, faces with four equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Co(1)O6 octahedra, and faces with four equivalent Co(2)O6 octahedra. Both Ba(1)-O(1) bond lengths are 2.71 Å. Both Ba(1)-O(2) bond lengths are 2.74 Å. Both Ba(1)-O(5) bond lengths are 3.00 Å. Both Ba(1)-O(6) bond lengths are 2.92 Å. All Ba(1)-O(7) bond lengths are 2.96 Å. Ho(1) is bonded to two equivalent O(3), two equivalent O(4), two equivalent O(5), two equivalent O(6), and four equivalent O(7) atoms to form HoO12 cuboctahedra that share corners with four equivalent Ho(1)O12 cuboctahedra, corners with eight equivalent Ba(1)O12 cuboctahedra, faces with two equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Ho(1)O12 cuboctahedra, faces with four equivalent Co(1)O6 octahedra, and faces with four equivalent Co(2)O6 octahedra. Both Ho(1)-O(3) bond lengths are 2.82 Å. Both Ho(1)-O(4) bond lengths are 2.62 Å. Both Ho(1)-O(5) bond lengths are 2.45 Å. Both Ho(1)-O(6) bond lengths are 2.76 Å. All Ho(1)-O(7) bond lengths are 2.52 Å. There are two inequivalent Co sites. In the first Co site, Co(1) is bonded to one O(2), one O(3), two equivalent O(6), and two equivalent O(7) atoms to form CoO6 octahedra that share corners with two equivalent Co(2)O6 octahedra, corners with four equivalent Co(1)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ho(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-14°. The Co(1)-O(2) bond length is 2.03 Å. The Co(1)-O(3) bond length is 1.91 Å. Both Co(1)-O(6) bond lengths are 1.89 Å. Both Co(1)-O(7) bond lengths are 2.02 Å. In the second Co site, Co(2) is bonded to one O(1), one O(4), two equivalent O(5), and two equivalent O(7) atoms to form CoO6 octahedra that share corners with two equivalent Co(1)O6 octahedra, corners with four equivalent Co(2)O6 octahedra, faces with four equivalent Ba(1)O12 cuboctahedra, and faces with four equivalent Ho(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 0-16°. The Co(2)-O(1) bond length is 2.02 Å. The Co(2)-O(4) bond length is 1.92 Å. Both Co(2)-O(5) bond lengths are 1.91 Å. Both Co(2)-O(7) bond lengths are 1.92 Å. There are seven inequivalent O sites. In the first O site, O(1) is bonded to four equivalent Ba(1) and two equivalent Co(2) atoms to form a mixture of corner and edge-sharing OBa4Co2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the second O site, O(2) is bonded to four equivalent Ba(1) and two equivalent Co(1) atoms to form a mixture of corner and edge-sharing OBa4Co2 octahedra. The corner-sharing octahedral tilt angles are 1°. In the third O site, O(3) is bonded in a linear geometry to four equivalent Ho(1) and two equivalent Co(1) atoms. In the fourth O site, O(4) is bonded in a distorted linear geometry to four equivalent Ho(1) and two equivalent Co(2) atoms. In the fifth O site, O(5) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Ho(1), and two equivalent Co(2) atoms. In the sixth O site, O(6) is bonded in a distorted linear geometry to two equivalent Ba(1), two equivalent Ho(1), and two equivalent Co(1) atoms. In the seventh O site, O(7) is bonded in a 6-coordinate geometry to two equivalent Ba(1), two equivalent Ho(1), one Co(1), and one Co(2) atom.