Ho5Ga3 crystallizes in the tetragonal P4/n space group. There are four inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to one Ga(2) and four equivalent Ga(3) atoms to form corner-sharing HoGa5 square pyramids. In the second Ho site, Ho(2) is bonded to one Ga(1) and four equivalent Ga(3) atoms to form corner-sharing HoGa5 square pyramids. In the third Ho site, Ho(3) is bonded in a 5-coordinate geometry to two equivalent Ga(1) and three equivalent Ga(3) atoms. In the fourth Ho site, Ho(4) is bonded in a 5-coordinate geometry to two equivalent Ga(2) and three equivalent Ga(3) atoms. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to one Ho(2) and eight equivalent Ho(3) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to one Ho(1) and eight equivalent Ho(4) atoms. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to one Ho(1), one Ho(2), three equivalent Ho(3), three equivalent Ho(4), and one Ga(3) atom.
Ho5Ga3 crystallizes in the tetragonal P4/n space group. There are four inequivalent Ho sites. In the first Ho site, Ho(1) is bonded to one Ga(2) and four equivalent Ga(3) atoms to form corner-sharing HoGa5 square pyramids. The Ho(1)-Ga(2) bond length is 3.16 Å. All Ho(1)-Ga(3) bond lengths are 3.01 Å. In the second Ho site, Ho(2) is bonded to one Ga(1) and four equivalent Ga(3) atoms to form corner-sharing HoGa5 square pyramids. The Ho(2)-Ga(1) bond length is 3.15 Å. All Ho(2)-Ga(3) bond lengths are 3.01 Å. In the third Ho site, Ho(3) is bonded in a 5-coordinate geometry to two equivalent Ga(1) and three equivalent Ga(3) atoms. There is one shorter (3.10 Å) and one longer (3.22 Å) Ho(3)-Ga(1) bond length. There are a spread of Ho(3)-Ga(3) bond distances ranging from 2.98-3.08 Å. In the fourth Ho site, Ho(4) is bonded in a 5-coordinate geometry to two equivalent Ga(2) and three equivalent Ga(3) atoms. There is one shorter (3.10 Å) and one longer (3.22 Å) Ho(4)-Ga(2) bond length. There are a spread of Ho(4)-Ga(3) bond distances ranging from 2.99-3.08 Å. There are three inequivalent Ga sites. In the first Ga site, Ga(1) is bonded in a 9-coordinate geometry to one Ho(2) and eight equivalent Ho(3) atoms. In the second Ga site, Ga(2) is bonded in a 9-coordinate geometry to one Ho(1) and eight equivalent Ho(4) atoms. In the third Ga site, Ga(3) is bonded in a 9-coordinate geometry to one Ho(1), one Ho(2), three equivalent Ho(3), three equivalent Ho(4), and one Ga(3) atom. The Ga(3)-Ga(3) bond length is 2.62 Å.