HoFe5Al7 crystallizes in the orthorhombic Imm2 space group. Ho(1) is bonded in a 20-coordinate geometry to two equivalent Fe(2), eight equivalent Fe(1), one Al(1), one Al(2), two equivalent Al(3), two equivalent Al(4), and four equivalent Al(5) atoms. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 12-coordinate geometry to two equivalent Ho(1), one Fe(2), two equivalent Fe(1), one Al(1), one Al(2), one Al(4), two equivalent Al(3), and two equivalent Al(5) atoms. In the second Fe site, Fe(2) is bonded to two equivalent Ho(1), four equivalent Fe(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(5) atoms to form distorted edge-sharing FeHo2Al6Fe4 cuboctahedra. There are five inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to one Ho(1), four equivalent Fe(1), one Al(2), two equivalent Al(4), and two equivalent Al(5) atoms. In the second Al site, Al(2) is bonded in a 7-coordinate geometry to one Ho(1), two equivalent Fe(2), four equivalent Fe(1), one Al(1), and two equivalent Al(5) atoms. In the third Al site, Al(3) is bonded in a 10-coordinate geometry to one Ho(1), one Fe(2), four equivalent Fe(1), one Al(3), one Al(4), and two equivalent Al(5) atoms. In the fourth Al site, Al(4) is bonded in a 12-coordinate geometry to two equivalent Ho(1), four equivalent Fe(1), two equivalent Al(1), two equivalent Al(3), and two equivalent Al(5) atoms. In the fifth Al site, Al(5) is bonded in a 12-coordinate geometry to two equivalent Ho(1), one Fe(2), four equivalent Fe(1), one Al(1), one Al(2), one Al(4), and two equivalent Al(3) atoms.
HoFe5Al7 crystallizes in the orthorhombic Imm2 space group. Ho(1) is bonded in a 20-coordinate geometry to two equivalent Fe(2), eight equivalent Fe(1), one Al(1), one Al(2), two equivalent Al(3), two equivalent Al(4), and four equivalent Al(5) atoms. Both Ho(1)-Fe(2) bond lengths are 3.19 Å. There are four shorter (3.27 Å) and four longer (3.33 Å) Ho(1)-Fe(1) bond lengths. The Ho(1)-Al(1) bond length is 2.97 Å. The Ho(1)-Al(2) bond length is 2.88 Å. Both Ho(1)-Al(3) bond lengths are 2.97 Å. Both Ho(1)-Al(4) bond lengths are 3.19 Å. All Ho(1)-Al(5) bond lengths are 3.10 Å. There are two inequivalent Fe sites. In the first Fe site, Fe(1) is bonded in a 12-coordinate geometry to two equivalent Ho(1), one Fe(2), two equivalent Fe(1), one Al(1), one Al(2), one Al(4), two equivalent Al(3), and two equivalent Al(5) atoms. The Fe(1)-Fe(2) bond length is 2.51 Å. There is one shorter (2.49 Å) and one longer (2.53 Å) Fe(1)-Fe(1) bond length. The Fe(1)-Al(1) bond length is 2.62 Å. The Fe(1)-Al(2) bond length is 2.62 Å. The Fe(1)-Al(4) bond length is 2.50 Å. There is one shorter (2.58 Å) and one longer (2.66 Å) Fe(1)-Al(3) bond length. There is one shorter (2.48 Å) and one longer (2.55 Å) Fe(1)-Al(5) bond length. In the second Fe site, Fe(2) is bonded to two equivalent Ho(1), four equivalent Fe(1), two equivalent Al(2), two equivalent Al(3), and two equivalent Al(5) atoms to form distorted edge-sharing FeHo2Al6Fe4 cuboctahedra. Both Fe(2)-Al(2) bond lengths are 2.67 Å. Both Fe(2)-Al(3) bond lengths are 2.61 Å. Both Fe(2)-Al(5) bond lengths are 2.69 Å. There are five inequivalent Al sites. In the first Al site, Al(1) is bonded in a 10-coordinate geometry to one Ho(1), four equivalent Fe(1), one Al(2), two equivalent Al(4), and two equivalent Al(5) atoms. The Al(1)-Al(2) bond length is 2.77 Å. Both Al(1)-Al(4) bond lengths are 2.70 Å. Both Al(1)-Al(5) bond lengths are 2.83 Å. In the second Al site, Al(2) is bonded in a 7-coordinate geometry to one Ho(1), two equivalent Fe(2), four equivalent Fe(1), one Al(1), and two equivalent Al(5) atoms. Both Al(2)-Al(5) bond lengths are 2.88 Å. In the third Al site, Al(3) is bonded in a 10-coordinate geometry to one Ho(1), one Fe(2), four equivalent Fe(1), one Al(3), one Al(4), and two equivalent Al(5) atoms. The Al(3)-Al(3) bond length is 2.72 Å. The Al(3)-Al(4) bond length is 2.80 Å. Both Al(3)-Al(5) bond lengths are 2.76 Å. In the fourth Al site, Al(4) is bonded in a 12-coordinate geometry to two equivalent Ho(1), four equivalent Fe(1), two equivalent Al(1), two equivalent Al(3), and two equivalent Al(5) atoms. Both Al(4)-Al(5) bond lengths are 2.69 Å. In the fifth Al site, Al(5) is bonded in a 12-coordinate geometry to two equivalent Ho(1), one Fe(2), four equivalent Fe(1), one Al(1), one Al(2), one Al(4), and two equivalent Al(3) atoms.