HoCoIn5 crystallizes in the tetragonal P4/mmm space group. Ho(1) is bonded to four equivalent In(2) and eight equivalent In(1) atoms to form HoIn12 cuboctahedra that share corners with four equivalent Ho(1)In12 cuboctahedra, faces with four equivalent Ho(1)In12 cuboctahedra, and faces with four equivalent In(2)Ho4In8 cuboctahedra. Co(1) is bonded in a body-centered cubic geometry to eight equivalent In(1) atoms. There are two inequivalent In sites. In the first In site, In(1) is bonded in a 11-coordinate geometry to two equivalent Ho(1), two equivalent Co(1), two equivalent In(2), and five equivalent In(1) atoms. In the second In site, In(2) is bonded to four equivalent Ho(1) and eight equivalent In(1) atoms to form distorted InHo4In8 cuboctahedra that share corners with four equivalent In(2)Ho4In8 cuboctahedra, faces with four equivalent Ho(1)In12 cuboctahedra, and faces with four equivalent In(2)Ho4In8 cuboctahedra.
HoCoIn5 crystallizes in the tetragonal P4/mmm space group. Ho(1) is bonded to four equivalent In(2) and eight equivalent In(1) atoms to form HoIn12 cuboctahedra that share corners with four equivalent Ho(1)In12 cuboctahedra, faces with four equivalent Ho(1)In12 cuboctahedra, and faces with four equivalent In(2)Ho4In8 cuboctahedra. All Ho(1)-In(2) bond lengths are 3.21 Å. All Ho(1)-In(1) bond lengths are 3.21 Å. Co(1) is bonded in a body-centered cubic geometry to eight equivalent In(1) atoms. All Co(1)-In(1) bond lengths are 2.69 Å. There are two inequivalent In sites. In the first In site, In(1) is bonded in a 11-coordinate geometry to two equivalent Ho(1), two equivalent Co(1), two equivalent In(2), and five equivalent In(1) atoms. Both In(1)-In(2) bond lengths are 3.21 Å. There is one shorter (2.87 Å) and four longer (3.21 Å) In(1)-In(1) bond lengths. In the second In site, In(2) is bonded to four equivalent Ho(1) and eight equivalent In(1) atoms to form distorted InHo4In8 cuboctahedra that share corners with four equivalent In(2)Ho4In8 cuboctahedra, faces with four equivalent Ho(1)In12 cuboctahedra, and faces with four equivalent In(2)Ho4In8 cuboctahedra.