Ho(FeB)2 crystallizes in the tetragonal I4/mmm space group. Ho(1) is bonded in a 8-coordinate geometry to eight equivalent B(1) atoms. Fe(1) is bonded to four equivalent B(1) atoms to form a mixture of corner and edge-sharing FeB4 tetrahedra. B(1) is bonded in a 9-coordinate geometry to four equivalent Ho(1), four equivalent Fe(1), and one B(1) atom.
Ho(FeB)2 crystallizes in the tetragonal I4/mmm space group. Ho(1) is bonded in a 8-coordinate geometry to eight equivalent B(1) atoms. All Ho(1)-B(1) bond lengths are 2.71 Å. Fe(1) is bonded to four equivalent B(1) atoms to form a mixture of corner and edge-sharing FeB4 tetrahedra. All Fe(1)-B(1) bond lengths are 2.13 Å. B(1) is bonded in a 9-coordinate geometry to four equivalent Ho(1), four equivalent Fe(1), and one B(1) atom. The B(1)-B(1) bond length is 2.32 Å.