HoReFe11 crystallizes in the orthorhombic Imm2 space group. Ho(1) is bonded in a 20-coordinate geometry to one Re(1), one Fe(5), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(6), four equivalent Fe(4), and eight equivalent Fe(1) atoms. Re(1) is bonded in a 14-coordinate geometry to one Ho(1), one Fe(5), two equivalent Fe(3), two equivalent Fe(4), four equivalent Fe(1), and four equivalent Fe(6) atoms. There are six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent Ho(1), one Re(1), one Fe(2), one Fe(3), one Fe(5), two equivalent Fe(1), two equivalent Fe(4), and two equivalent Fe(6) atoms to form FeHo2Fe9Re cuboctahedra that share corners with two equivalent Fe(2)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(3)Ho2Fe8Re2 cuboctahedra, corners with four equivalent Fe(4)Ho2Fe9Re cuboctahedra, corners with ten equivalent Fe(1)Ho2Fe9Re cuboctahedra,  an edgeedge with one Fe(2)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(3)Ho2Fe8Re2 cuboctahedra, edges with two equivalent Fe(4)Ho2Fe9Re cuboctahedra, edges with four equivalent Fe(1)Ho2Fe9Re cuboctahedra, faces with two equivalent Fe(2)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(3)Ho2Fe8Re2 cuboctahedra, faces with four equivalent Fe(4)Ho2Fe9Re cuboctahedra, and faces with six equivalent Fe(1)Ho2Fe9Re cuboctahedra. In the second Fe site, Fe(2) is bonded to two equivalent Ho(1), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), and four equivalent Fe(1) atoms to form distorted FeHo2Fe10 cuboctahedra that share corners with four equivalent Fe(4)Ho2Fe9Re cuboctahedra, corners with six equivalent Fe(3)Ho2Fe8Re2 cuboctahedra, corners with eight equivalent Fe(1)Ho2Fe9Re cuboctahedra,  an edgeedge with one Fe(3)Ho2Fe8Re2 cuboctahedra, edges with two equivalent Fe(2)Ho2Fe10 cuboctahedra, edges with four equivalent Fe(1)Ho2Fe9Re cuboctahedra,  a faceface with one Fe(3)Ho2Fe8Re2 cuboctahedra, faces with six equivalent Fe(4)Ho2Fe9Re cuboctahedra, and faces with eight equivalent Fe(1)Ho2Fe9Re cuboctahedra. In the third Fe site, Fe(3) is bonded to two equivalent Ho(1), two equivalent Re(1), two equivalent Fe(4), two equivalent Fe(6), and four equivalent Fe(1) atoms to form distorted FeHo2Fe8Re2 cuboctahedra that share corners with four equivalent Fe(4)Ho2Fe9Re cuboctahedra, corners with six equivalent Fe(2)Ho2Fe10 cuboctahedra, corners with eight equivalent Fe(1)Ho2Fe9Re cuboctahedra,  an edgeedge with one Fe(2)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(3)Ho2Fe8Re2 cuboctahedra, edges with four equivalent Fe(1)Ho2Fe9Re cuboctahedra,  a faceface with one Fe(2)Ho2Fe10 cuboctahedra, faces with six equivalent Fe(4)Ho2Fe9Re cuboctahedra, and faces with eight equivalent Fe(1)Ho2Fe9Re cuboctahedra. In the fourth Fe site, Fe(4) is bonded to two equivalent Ho(1), one Re(1), one Fe(2), one Fe(3), one Fe(5), two equivalent Fe(6), and four equivalent Fe(1) atoms to form distorted FeHo2Fe9Re cuboctahedra that share corners with two equivalent Fe(2)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(3)Ho2Fe8Re2 cuboctahedra, corners with six equivalent Fe(4)Ho2Fe9Re cuboctahedra, corners with eight equivalent Fe(1)Ho2Fe9Re cuboctahedra, edges with three equivalent Fe(4)Ho2Fe9Re cuboctahedra, edges with four equivalent Fe(1)Ho2Fe9Re cuboctahedra,  a faceface with one Fe(4)Ho2Fe9Re cuboctahedra, faces with three equivalent Fe(2)Ho2Fe10 cuboctahedra, faces with three equivalent Fe(3)Ho2Fe8Re2 cuboctahedra, and faces with eight equivalent Fe(1)Ho2Fe9Re cuboctahedra. In the fifth Fe site, Fe(5) is bonded in a 14-coordinate geometry to one Ho(1), one Re(1), two equivalent Fe(2), two equivalent Fe(4), four equivalent Fe(1), and four equivalent Fe(6) atoms. In the sixth Fe site, Fe(6) is bonded in a 14-coordinate geometry to one Ho(1), two equivalent Re(1), one Fe(2), one Fe(3), one Fe(6), two equivalent Fe(4), two equivalent Fe(5), and four equivalent Fe(1) atoms.
HoReFe11 crystallizes in the orthorhombic Imm2 space group. Ho(1) is bonded in a 20-coordinate geometry to one Re(1), one Fe(5), two equivalent Fe(2), two equivalent Fe(3), two equivalent Fe(6), four equivalent Fe(4), and eight equivalent Fe(1) atoms. The Ho(1)-Re(1) bond length is 3.10 Å. The Ho(1)-Fe(5) bond length is 3.02 Å. Both Ho(1)-Fe(2) bond lengths are 3.01 Å. Both Ho(1)-Fe(3) bond lengths are 3.06 Å. Both Ho(1)-Fe(6) bond lengths are 3.03 Å. All Ho(1)-Fe(4) bond lengths are 3.01 Å. There are four shorter (3.19 Å) and four longer (3.24 Å) Ho(1)-Fe(1) bond lengths. Re(1) is bonded in a 14-coordinate geometry to one Ho(1), one Fe(5), two equivalent Fe(3), two equivalent Fe(4), four equivalent Fe(1), and four equivalent Fe(6) atoms. The Re(1)-Fe(5) bond length is 2.37 Å. Both Re(1)-Fe(3) bond lengths are 2.60 Å. Both Re(1)-Fe(4) bond lengths are 2.61 Å. All Re(1)-Fe(1) bond lengths are 2.60 Å. All Re(1)-Fe(6) bond lengths are 2.88 Å. There are six inequivalent Fe sites. In the first Fe site, Fe(1) is bonded to two equivalent Ho(1), one Re(1), one Fe(2), one Fe(3), one Fe(5), two equivalent Fe(1), two equivalent Fe(4), and two equivalent Fe(6) atoms to form FeHo2Fe9Re cuboctahedra that share corners with two equivalent Fe(2)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(3)Ho2Fe8Re2 cuboctahedra, corners with four equivalent Fe(4)Ho2Fe9Re cuboctahedra, corners with ten equivalent Fe(1)Ho2Fe9Re cuboctahedra,  an edgeedge with one Fe(2)Ho2Fe10 cuboctahedra,  an edgeedge with one Fe(3)Ho2Fe8Re2 cuboctahedra, edges with two equivalent Fe(4)Ho2Fe9Re cuboctahedra, edges with four equivalent Fe(1)Ho2Fe9Re cuboctahedra, faces with two equivalent Fe(2)Ho2Fe10 cuboctahedra, faces with two equivalent Fe(3)Ho2Fe8Re2 cuboctahedra, faces with four equivalent Fe(4)Ho2Fe9Re cuboctahedra, and faces with six equivalent Fe(1)Ho2Fe9Re cuboctahedra. The Fe(1)-Fe(2) bond length is 2.42 Å. The Fe(1)-Fe(3) bond length is 2.42 Å. The Fe(1)-Fe(5) bond length is 2.58 Å. Both Fe(1)-Fe(1) bond lengths are 2.34 Å. There is one shorter (2.42 Å) and one longer (2.45 Å) Fe(1)-Fe(4) bond length. There is one shorter (2.58 Å) and one longer (2.60 Å) Fe(1)-Fe(6) bond length. In the second Fe site, Fe(2) is bonded to two equivalent Ho(1), two equivalent Fe(4), two equivalent Fe(5), two equivalent Fe(6), and four equivalent Fe(1) atoms to form distorted FeHo2Fe10 cuboctahedra that share corners with four equivalent Fe(4)Ho2Fe9Re cuboctahedra, corners with six equivalent Fe(3)Ho2Fe8Re2 cuboctahedra, corners with eight equivalent Fe(1)Ho2Fe9Re cuboctahedra,  an edgeedge with one Fe(3)Ho2Fe8Re2 cuboctahedra, edges with two equivalent Fe(2)Ho2Fe10 cuboctahedra, edges with four equivalent Fe(1)Ho2Fe9Re cuboctahedra,  a faceface with one Fe(3)Ho2Fe8Re2 cuboctahedra, faces with six equivalent Fe(4)Ho2Fe9Re cuboctahedra, and faces with eight equivalent Fe(1)Ho2Fe9Re cuboctahedra. Both Fe(2)-Fe(4) bond lengths are 2.70 Å. Both Fe(2)-Fe(5) bond lengths are 2.60 Å. Both Fe(2)-Fe(6) bond lengths are 2.60 Å. In the third Fe site, Fe(3) is bonded to two equivalent Ho(1), two equivalent Re(1), two equivalent Fe(4), two equivalent Fe(6), and four equivalent Fe(1) atoms to form distorted FeHo2Fe8Re2 cuboctahedra that share corners with four equivalent Fe(4)Ho2Fe9Re cuboctahedra, corners with six equivalent Fe(2)Ho2Fe10 cuboctahedra, corners with eight equivalent Fe(1)Ho2Fe9Re cuboctahedra,  an edgeedge with one Fe(2)Ho2Fe10 cuboctahedra, edges with two equivalent Fe(3)Ho2Fe8Re2 cuboctahedra, edges with four equivalent Fe(1)Ho2Fe9Re cuboctahedra,  a faceface with one Fe(2)Ho2Fe10 cuboctahedra, faces with six equivalent Fe(4)Ho2Fe9Re cuboctahedra, and faces with eight equivalent Fe(1)Ho2Fe9Re cuboctahedra. Both Fe(3)-Fe(4) bond lengths are 2.69 Å. Both Fe(3)-Fe(6) bond lengths are 2.61 Å. In the fourth Fe site, Fe(4) is bonded to two equivalent Ho(1), one Re(1), one Fe(2), one Fe(3), one Fe(5), two equivalent Fe(6), and four equivalent Fe(1) atoms to form distorted FeHo2Fe9Re cuboctahedra that share corners with two equivalent Fe(2)Ho2Fe10 cuboctahedra, corners with two equivalent Fe(3)Ho2Fe8Re2 cuboctahedra, corners with six equivalent Fe(4)Ho2Fe9Re cuboctahedra, corners with eight equivalent Fe(1)Ho2Fe9Re cuboctahedra, edges with three equivalent Fe(4)Ho2Fe9Re cuboctahedra, edges with four equivalent Fe(1)Ho2Fe9Re cuboctahedra,  a faceface with one Fe(4)Ho2Fe9Re cuboctahedra, faces with three equivalent Fe(2)Ho2Fe10 cuboctahedra, faces with three equivalent Fe(3)Ho2Fe8Re2 cuboctahedra, and faces with eight equivalent Fe(1)Ho2Fe9Re cuboctahedra. The Fe(4)-Fe(5) bond length is 2.61 Å. Both Fe(4)-Fe(6) bond lengths are 2.61 Å. In the fifth Fe site, Fe(5) is bonded in a 14-coordinate geometry to one Ho(1), one Re(1), two equivalent Fe(2), two equivalent Fe(4), four equivalent Fe(1), and four equivalent Fe(6) atoms. All Fe(5)-Fe(6) bond lengths are 2.88 Å. In the sixth Fe site, Fe(6) is bonded in a 14-coordinate geometry to one Ho(1), two equivalent Re(1), one Fe(2), one Fe(3), one Fe(6), two equivalent Fe(4), two equivalent Fe(5), and four equivalent Fe(1) atoms. The Fe(6)-Fe(6) bond length is 2.38 Å.