HoWB4 crystallizes in the orthorhombic Pbam space group. Ho(1) is bonded in a 18-coordinate geometry to four equivalent W(1), two equivalent B(4), four equivalent B(1), four equivalent B(2), and four equivalent B(3) atoms. W(1) is bonded in a 10-coordinate geometry to four equivalent Ho(1), two equivalent B(1), two equivalent B(2), two equivalent B(3), and four equivalent B(4) atoms. There are four inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to four equivalent Ho(1), two equivalent W(1), one B(4), and two equivalent B(2) atoms. In the second B site, B(2) is bonded in a 9-coordinate geometry to four equivalent Ho(1), two equivalent W(1), one B(3), and two equivalent B(1) atoms. In the third B site, B(3) is bonded in a 9-coordinate geometry to four equivalent Ho(1), two equivalent W(1), one B(2), one B(3), and one B(4) atom. In the fourth B site, B(4) is bonded in a 9-coordinate geometry to two equivalent Ho(1), four equivalent W(1), one B(1), one B(3), and one B(4) atom.
HoWB4 crystallizes in the orthorhombic Pbam space group. Ho(1) is bonded in a 18-coordinate geometry to four equivalent W(1), two equivalent B(4), four equivalent B(1), four equivalent B(2), and four equivalent B(3) atoms. There are a spread of Ho(1)-W(1) bond distances ranging from 3.08-3.12 Å. Both Ho(1)-B(4) bond lengths are 2.66 Å. There are two shorter (2.72 Å) and two longer (2.82 Å) Ho(1)-B(1) bond lengths. There are two shorter (2.76 Å) and two longer (2.80 Å) Ho(1)-B(2) bond lengths. There are two shorter (2.75 Å) and two longer (2.77 Å) Ho(1)-B(3) bond lengths. W(1) is bonded in a 10-coordinate geometry to four equivalent Ho(1), two equivalent B(1), two equivalent B(2), two equivalent B(3), and four equivalent B(4) atoms. Both W(1)-B(1) bond lengths are 2.39 Å. Both W(1)-B(2) bond lengths are 2.36 Å. Both W(1)-B(3) bond lengths are 2.38 Å. All W(1)-B(4) bond lengths are 2.37 Å. There are four inequivalent B sites. In the first B site, B(1) is bonded in a 9-coordinate geometry to four equivalent Ho(1), two equivalent W(1), one B(4), and two equivalent B(2) atoms. The B(1)-B(4) bond length is 1.78 Å. There is one shorter (1.80 Å) and one longer (1.87 Å) B(1)-B(2) bond length. In the second B site, B(2) is bonded in a 9-coordinate geometry to four equivalent Ho(1), two equivalent W(1), one B(3), and two equivalent B(1) atoms. The B(2)-B(3) bond length is 1.86 Å. In the third B site, B(3) is bonded in a 9-coordinate geometry to four equivalent Ho(1), two equivalent W(1), one B(2), one B(3), and one B(4) atom. The B(3)-B(3) bond length is 1.77 Å. The B(3)-B(4) bond length is 1.78 Å. In the fourth B site, B(4) is bonded in a 9-coordinate geometry to two equivalent Ho(1), four equivalent W(1), one B(1), one B(3), and one B(4) atom. The B(4)-B(4) bond length is 1.76 Å.