Ho2Fe3Al is Cubic Laves-derived structured and crystallizes in the trigonal R-3m space group. Ho(1) is bonded in a 16-coordinate geometry to four equivalent Ho(1), nine equivalent Fe(1), and three equivalent Al(1) atoms. Fe(1) is bonded to six equivalent Ho(1), four equivalent Fe(1), and two equivalent Al(1) atoms to form FeHo6Al2Fe4 cuboctahedra that share corners with four equivalent Al(1)Ho6Fe6 cuboctahedra, corners with fourteen equivalent Fe(1)Ho6Al2Fe4 cuboctahedra, edges with six equivalent Fe(1)Ho6Al2Fe4 cuboctahedra, faces with six equivalent Al(1)Ho6Fe6 cuboctahedra, and faces with twelve equivalent Fe(1)Ho6Al2Fe4 cuboctahedra. Al(1) is bonded to six equivalent Ho(1) and six equivalent Fe(1) atoms to form AlHo6Fe6 cuboctahedra that share corners with six equivalent Al(1)Ho6Fe6 cuboctahedra, corners with twelve equivalent Fe(1)Ho6Al2Fe4 cuboctahedra, edges with six equivalent Al(1)Ho6Fe6 cuboctahedra, and faces with eighteen equivalent Fe(1)Ho6Al2Fe4 cuboctahedra.
Ho2Fe3Al is Cubic Laves-derived structured and crystallizes in the trigonal R-3m space group. Ho(1) is bonded in a 16-coordinate geometry to four equivalent Ho(1), nine equivalent Fe(1), and three equivalent Al(1) atoms. There is one shorter (3.17 Å) and three longer (3.24 Å) Ho(1)-Ho(1) bond lengths. There are six shorter (3.06 Å) and three longer (3.13 Å) Ho(1)-Fe(1) bond lengths. All Ho(1)-Al(1) bond lengths are 3.08 Å. Fe(1) is bonded to six equivalent Ho(1), four equivalent Fe(1), and two equivalent Al(1) atoms to form FeHo6Al2Fe4 cuboctahedra that share corners with four equivalent Al(1)Ho6Fe6 cuboctahedra, corners with fourteen equivalent Fe(1)Ho6Al2Fe4 cuboctahedra, edges with six equivalent Fe(1)Ho6Al2Fe4 cuboctahedra, faces with six equivalent Al(1)Ho6Fe6 cuboctahedra, and faces with twelve equivalent Fe(1)Ho6Al2Fe4 cuboctahedra. All Fe(1)-Fe(1) bond lengths are 2.62 Å. Both Fe(1)-Al(1) bond lengths are 2.64 Å. Al(1) is bonded to six equivalent Ho(1) and six equivalent Fe(1) atoms to form AlHo6Fe6 cuboctahedra that share corners with six equivalent Al(1)Ho6Fe6 cuboctahedra, corners with twelve equivalent Fe(1)Ho6Al2Fe4 cuboctahedra, edges with six equivalent Al(1)Ho6Fe6 cuboctahedra, and faces with eighteen equivalent Fe(1)Ho6Al2Fe4 cuboctahedra.