Ho2Cu(BO2)8 crystallizes in the orthorhombic Pbam space group. Ho(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Cu(1) is bonded in an octahedral geometry to two equivalent O(5) and four equivalent O(2) atoms. There are three inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(2), one O(4), and one O(5) atom. In the second B site, B(2) is bonded in a tetrahedral geometry to two equivalent O(3) and two equivalent O(4) atoms. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(3) atoms. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Ho(1) and one B(3) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Ho(1), one Cu(1), and one B(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Ho(1), one B(2), and one B(3) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Ho(1), one B(1), and one B(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and two equivalent B(1) atoms.
Ho2Cu(BO2)8 crystallizes in the orthorhombic Pbam space group. Ho(1) is bonded in a 8-coordinate geometry to two equivalent O(1), two equivalent O(2), two equivalent O(3), and two equivalent O(4) atoms. Both Ho(1)-O(1) bond lengths are 2.35 Å. Both Ho(1)-O(2) bond lengths are 2.28 Å. Both Ho(1)-O(3) bond lengths are 2.44 Å. Both Ho(1)-O(4) bond lengths are 2.47 Å. Cu(1) is bonded in an octahedral geometry to two equivalent O(5) and four equivalent O(2) atoms. Both Cu(1)-O(5) bond lengths are 2.44 Å. All Cu(1)-O(2) bond lengths are 1.99 Å. There are three inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(2), one O(4), and one O(5) atom. The B(1)-O(2) bond length is 1.35 Å. The B(1)-O(4) bond length is 1.40 Å. The B(1)-O(5) bond length is 1.39 Å. In the second B site, B(2) is bonded in a tetrahedral geometry to two equivalent O(3) and two equivalent O(4) atoms. Both B(2)-O(3) bond lengths are 1.48 Å. Both B(2)-O(4) bond lengths are 1.47 Å. In the third B site, B(3) is bonded in a trigonal planar geometry to one O(1) and two equivalent O(3) atoms. The B(3)-O(1) bond length is 1.35 Å. Both B(3)-O(3) bond lengths are 1.40 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Ho(1) and one B(3) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to one Ho(1), one Cu(1), and one B(1) atom. In the third O site, O(3) is bonded in a 2-coordinate geometry to one Ho(1), one B(2), and one B(3) atom. In the fourth O site, O(4) is bonded in a distorted bent 120 degrees geometry to one Ho(1), one B(1), and one B(2) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and two equivalent B(1) atoms.