Ho2RhB6 crystallizes in the orthorhombic Pbam space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 17-coordinate geometry to three equivalent Rh(1), two equivalent B(1), two equivalent B(2), two equivalent B(4), two equivalent B(5), two equivalent B(6), and four equivalent B(3) atoms. In the second Ho site, Ho(2) is bonded in a 14-coordinate geometry to two equivalent Rh(1), two equivalent B(2), two equivalent B(4), two equivalent B(5), two equivalent B(6), and four equivalent B(1) atoms. Rh(1) is bonded in a 15-coordinate geometry to two equivalent Ho(2), three equivalent Ho(1), two equivalent B(2), two equivalent B(3), two equivalent B(4), two equivalent B(5), and two equivalent B(6) atoms. There are six inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to two equivalent Ho(1), four equivalent Ho(2), one B(1), one B(2), and one B(5) atom. In the second B site, B(2) is bonded in a 9-coordinate geometry to two equivalent Ho(1), two equivalent Ho(2), two equivalent Rh(1), one B(1), one B(4), and one B(6) atom. In the third B site, B(3) is bonded in a 9-coordinate geometry to four equivalent Ho(1), two equivalent Rh(1), one B(3), one B(4), and one B(5) atom. In the fourth B site, B(4) is bonded in a 9-coordinate geometry to two equivalent Ho(1), two equivalent Ho(2), two equivalent Rh(1), one B(2), one B(3), and one B(6) atom. In the fifth B site, B(5) is bonded in a 9-coordinate geometry to two equivalent Ho(1), two equivalent Ho(2), two equivalent Rh(1), one B(1), one B(3), and one B(6) atom. In the sixth B site, B(6) is bonded in a 9-coordinate geometry to two equivalent Ho(1), two equivalent Ho(2), two equivalent Rh(1), one B(2), one B(4), and one B(5) atom.
Ho2RhB6 crystallizes in the orthorhombic Pbam space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a 17-coordinate geometry to three equivalent Rh(1), two equivalent B(1), two equivalent B(2), two equivalent B(4), two equivalent B(5), two equivalent B(6), and four equivalent B(3) atoms. There are a spread of Ho(1)-Rh(1) bond distances ranging from 3.06-3.17 Å. Both Ho(1)-B(1) bond lengths are 2.73 Å. Both Ho(1)-B(2) bond lengths are 2.75 Å. Both Ho(1)-B(4) bond lengths are 2.75 Å. Both Ho(1)-B(5) bond lengths are 2.72 Å. Both Ho(1)-B(6) bond lengths are 2.75 Å. There are two shorter (2.77 Å) and two longer (2.79 Å) Ho(1)-B(3) bond lengths. In the second Ho site, Ho(2) is bonded in a 14-coordinate geometry to two equivalent Rh(1), two equivalent B(2), two equivalent B(4), two equivalent B(5), two equivalent B(6), and four equivalent B(1) atoms. There is one shorter (2.85 Å) and one longer (2.86 Å) Ho(2)-Rh(1) bond length. Both Ho(2)-B(2) bond lengths are 2.60 Å. Both Ho(2)-B(4) bond lengths are 2.62 Å. Both Ho(2)-B(5) bond lengths are 2.61 Å. Both Ho(2)-B(6) bond lengths are 2.60 Å. There are two shorter (2.61 Å) and two longer (2.62 Å) Ho(2)-B(1) bond lengths. Rh(1) is bonded in a 15-coordinate geometry to two equivalent Ho(2), three equivalent Ho(1), two equivalent B(2), two equivalent B(3), two equivalent B(4), two equivalent B(5), and two equivalent B(6) atoms. Both Rh(1)-B(2) bond lengths are 2.40 Å. Both Rh(1)-B(3) bond lengths are 2.37 Å. Both Rh(1)-B(4) bond lengths are 2.35 Å. Both Rh(1)-B(5) bond lengths are 2.37 Å. Both Rh(1)-B(6) bond lengths are 2.39 Å. There are six inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to two equivalent Ho(1), four equivalent Ho(2), one B(1), one B(2), and one B(5) atom. The B(1)-B(1) bond length is 2.16 Å. The B(1)-B(2) bond length is 1.78 Å. The B(1)-B(5) bond length is 1.79 Å. In the second B site, B(2) is bonded in a 9-coordinate geometry to two equivalent Ho(1), two equivalent Ho(2), two equivalent Rh(1), one B(1), one B(4), and one B(6) atom. The B(2)-B(4) bond length is 1.81 Å. The B(2)-B(6) bond length is 1.73 Å. In the third B site, B(3) is bonded in a 9-coordinate geometry to four equivalent Ho(1), two equivalent Rh(1), one B(3), one B(4), and one B(5) atom. The B(3)-B(3) bond length is 1.80 Å. The B(3)-B(4) bond length is 1.80 Å. The B(3)-B(5) bond length is 1.79 Å. In the fourth B site, B(4) is bonded in a 9-coordinate geometry to two equivalent Ho(1), two equivalent Ho(2), two equivalent Rh(1), one B(2), one B(3), and one B(6) atom. The B(4)-B(6) bond length is 1.83 Å. In the fifth B site, B(5) is bonded in a 9-coordinate geometry to two equivalent Ho(1), two equivalent Ho(2), two equivalent Rh(1), one B(1), one B(3), and one B(6) atom. The B(5)-B(6) bond length is 1.83 Å. In the sixth B site, B(6) is bonded in a 9-coordinate geometry to two equivalent Ho(1), two equivalent Ho(2), two equivalent Rh(1), one B(2), one B(4), and one B(5) atom.