TbCu(BO2)5 crystallizes in the orthorhombic Ibam space group. Tb(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(3) atoms. Cu(1) is bonded in an octahedral geometry to two equivalent O(2) and four equivalent O(3) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a tetrahedral geometry to four equivalent O(1) atoms. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. There are three inequivalent O sites. In the first O site, O(3) is bonded in a 3-coordinate geometry to one Tb(1), one Cu(1), and one B(2) atom. In the second O site, O(1) is bonded in a 2-coordinate geometry to one Tb(1), one B(1), and one B(2) atom. In the third O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and two equivalent B(2) atoms.
TbCu(BO2)5 crystallizes in the orthorhombic Ibam space group. Tb(1) is bonded in a 8-coordinate geometry to four equivalent O(1) and four equivalent O(3) atoms. All Tb(1)-O(1) bond lengths are 2.53 Å. All Tb(1)-O(3) bond lengths are 2.27 Å. Cu(1) is bonded in an octahedral geometry to two equivalent O(2) and four equivalent O(3) atoms. Both Cu(1)-O(2) bond lengths are 2.48 Å. All Cu(1)-O(3) bond lengths are 1.99 Å. There are two inequivalent B sites. In the first B site, B(1) is bonded in a tetrahedral geometry to four equivalent O(1) atoms. All B(1)-O(1) bond lengths are 1.48 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(2), and one O(3) atom. The B(2)-O(1) bond length is 1.40 Å. The B(2)-O(2) bond length is 1.40 Å. The B(2)-O(3) bond length is 1.35 Å. There are three inequivalent O sites. In the first O site, O(3) is bonded in a 3-coordinate geometry to one Tb(1), one Cu(1), and one B(2) atom. In the second O site, O(1) is bonded in a 2-coordinate geometry to one Tb(1), one B(1), and one B(2) atom. In the third O site, O(2) is bonded in a distorted bent 120 degrees geometry to one Cu(1) and two equivalent B(2) atoms.