Ho2Pr4Mn23 crystallizes in the orthorhombic Imm2 space group. Ho(1) is bonded in a 12-coordinate geometry to one Mn(10), one Mn(9), two equivalent Mn(1), two equivalent Mn(3), two equivalent Mn(5), two equivalent Mn(7), and two equivalent Mn(8) atoms. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 12-coordinate geometry to one Mn(1), one Mn(2), one Mn(5), one Mn(6), two equivalent Mn(3), two equivalent Mn(7), and four equivalent Mn(8) atoms. In the second Pr site, Pr(2) is bonded in a 12-coordinate geometry to one Mn(10), one Mn(9), two equivalent Mn(2), two equivalent Mn(3), two equivalent Mn(6), two equivalent Mn(7), and two equivalent Mn(8) atoms. There are ten inequivalent Mn sites. In the first Mn site, Mn(10) is bonded to two equivalent Ho(1), two equivalent Pr(2), two equivalent Mn(1), two equivalent Mn(2), and four equivalent Mn(7) atoms to form MnPr2Ho2Mn8 cuboctahedra that share corners with four equivalent Mn(9)Pr2Ho2Mn8 cuboctahedra, corners with eight equivalent Mn(3)Pr2HoMn9 cuboctahedra, faces with two equivalent Mn(2)Pr3Mn9 cuboctahedra, faces with four equivalent Mn(3)Pr2HoMn9 cuboctahedra, and faces with eight equivalent Mn(8)Pr3HoMn8 cuboctahedra. In the second Mn site, Mn(1) is bonded in a distorted q6 geometry to two equivalent Ho(1), one Pr(1), one Mn(10), one Mn(2), one Mn(6), two equivalent Mn(3), two equivalent Mn(7), and two equivalent Mn(8) atoms. In the third Mn site, Mn(2) is bonded to one Pr(1), two equivalent Pr(2), one Mn(1), one Mn(10), one Mn(5), two equivalent Mn(3), two equivalent Mn(7), and two equivalent Mn(8) atoms to form MnPr3Mn9 cuboctahedra that share corners with two equivalent Mn(9)Pr2Ho2Mn8 cuboctahedra, corners with two equivalent Mn(3)Pr2HoMn9 cuboctahedra, corners with four equivalent Mn(8)Pr3HoMn8 cuboctahedra,  a faceface with one Mn(10)Pr2Ho2Mn8 cuboctahedra,  a faceface with one Mn(9)Pr2Ho2Mn8 cuboctahedra,  a faceface with one Mn(2)Pr3Mn9 cuboctahedra, faces with four equivalent Mn(3)Pr2HoMn9 cuboctahedra, and faces with four equivalent Mn(8)Pr3HoMn8 cuboctahedra. In the fourth Mn site, Mn(3) is bonded to one Ho(1), one Pr(1), one Pr(2), one Mn(1), one Mn(2), one Mn(3), one Mn(5), one Mn(6), one Mn(7), one Mn(9), and two equivalent Mn(8) atoms to form distorted MnPr2HoMn9 cuboctahedra that share  a cornercorner with one Mn(2)Pr3Mn9 cuboctahedra, corners with two equivalent Mn(10)Pr2Ho2Mn8 cuboctahedra, corners with four equivalent Mn(3)Pr2HoMn9 cuboctahedra, corners with four equivalent Mn(8)Pr3HoMn8 cuboctahedra,  a faceface with one Mn(10)Pr2Ho2Mn8 cuboctahedra,  a faceface with one Mn(9)Pr2Ho2Mn8 cuboctahedra, faces with two equivalent Mn(3)Pr2HoMn9 cuboctahedra, faces with two equivalent Mn(2)Pr3Mn9 cuboctahedra, and faces with four equivalent Mn(8)Pr3HoMn8 cuboctahedra. In the fifth Mn site, Mn(4) is bonded in a body-centered cubic geometry to two equivalent Mn(5), two equivalent Mn(6), and four equivalent Mn(7) atoms. In the sixth Mn site, Mn(5) is bonded in a 13-coordinate geometry to two equivalent Ho(1), one Pr(1), one Mn(2), one Mn(4), one Mn(5), one Mn(9), two equivalent Mn(3), two equivalent Mn(7), and two equivalent Mn(8) atoms. In the seventh Mn site, Mn(6) is bonded in a 13-coordinate geometry to one Pr(1), two equivalent Pr(2), one Mn(1), one Mn(4), one Mn(6), one Mn(9), two equivalent Mn(3), two equivalent Mn(7), and two equivalent Mn(8) atoms. In the eighth Mn site, Mn(7) is bonded in a 13-coordinate geometry to one Ho(1), one Pr(1), one Pr(2), one Mn(1), one Mn(10), one Mn(2), one Mn(3), one Mn(4), one Mn(5), one Mn(6), one Mn(7), and two equivalent Mn(8) atoms. In the ninth Mn site, Mn(8) is bonded to one Ho(1), one Pr(2), two equivalent Pr(1), one Mn(1), one Mn(2), one Mn(5), one Mn(6), two equivalent Mn(3), and two equivalent Mn(7) atoms to form MnPr3HoMn8 cuboctahedra that share corners with two equivalent Mn(2)Pr3Mn9 cuboctahedra, corners with four equivalent Mn(3)Pr2HoMn9 cuboctahedra, corners with four equivalent Mn(8)Pr3HoMn8 cuboctahedra, faces with two equivalent Mn(10)Pr2Ho2Mn8 cuboctahedra, faces with two equivalent Mn(9)Pr2Ho2Mn8 cuboctahedra, faces with two equivalent Mn(2)Pr3Mn9 cuboctahedra, faces with four equivalent Mn(3)Pr2HoMn9 cuboctahedra, and faces with four equivalent Mn(8)Pr3HoMn8 cuboctahedra. In the tenth Mn site, Mn(9) is bonded to two equivalent Ho(1), two equivalent Pr(2), two equivalent Mn(5), two equivalent Mn(6), and four equivalent Mn(3) atoms to form MnPr2Ho2Mn8 cuboctahedra that share corners with four equivalent Mn(10)Pr2Ho2Mn8 cuboctahedra, corners with four equivalent Mn(2)Pr3Mn9 cuboctahedra, faces with two equivalent Mn(2)Pr3Mn9 cuboctahedra, faces with four equivalent Mn(3)Pr2HoMn9 cuboctahedra, and faces with eight equivalent Mn(8)Pr3HoMn8 cuboctahedra.
Ho2Pr4Mn23 crystallizes in the orthorhombic Imm2 space group. Ho(1) is bonded in a 12-coordinate geometry to one Mn(10), one Mn(9), two equivalent Mn(1), two equivalent Mn(3), two equivalent Mn(5), two equivalent Mn(7), and two equivalent Mn(8) atoms. The Ho(1)-Mn(10) bond length is 2.98 Å. The Ho(1)-Mn(9) bond length is 3.10 Å. Both Ho(1)-Mn(1) bond lengths are 3.05 Å. Both Ho(1)-Mn(3) bond lengths are 3.11 Å. Both Ho(1)-Mn(5) bond lengths are 2.95 Å. Both Ho(1)-Mn(7) bond lengths are 2.89 Å. Both Ho(1)-Mn(8) bond lengths are 3.03 Å. There are two inequivalent Pr sites. In the first Pr site, Pr(1) is bonded in a 12-coordinate geometry to one Mn(1), one Mn(2), one Mn(5), one Mn(6), two equivalent Mn(3), two equivalent Mn(7), and four equivalent Mn(8) atoms. The Pr(1)-Mn(1) bond length is 3.10 Å. The Pr(1)-Mn(2) bond length is 3.13 Å. The Pr(1)-Mn(5) bond length is 3.03 Å. The Pr(1)-Mn(6) bond length is 2.99 Å. Both Pr(1)-Mn(3) bond lengths are 3.11 Å. Both Pr(1)-Mn(7) bond lengths are 3.02 Å. There are two shorter (3.08 Å) and two longer (3.12 Å) Pr(1)-Mn(8) bond lengths. In the second Pr site, Pr(2) is bonded in a 12-coordinate geometry to one Mn(10), one Mn(9), two equivalent Mn(2), two equivalent Mn(3), two equivalent Mn(6), two equivalent Mn(7), and two equivalent Mn(8) atoms. The Pr(2)-Mn(10) bond length is 3.15 Å. The Pr(2)-Mn(9) bond length is 3.14 Å. Both Pr(2)-Mn(2) bond lengths are 3.09 Å. Both Pr(2)-Mn(3) bond lengths are 3.10 Å. Both Pr(2)-Mn(6) bond lengths are 3.00 Å. Both Pr(2)-Mn(7) bond lengths are 2.98 Å. Both Pr(2)-Mn(8) bond lengths are 3.12 Å. There are ten inequivalent Mn sites. In the first Mn site, Mn(10) is bonded to two equivalent Ho(1), two equivalent Pr(2), two equivalent Mn(1), two equivalent Mn(2), and four equivalent Mn(7) atoms to form MnPr2Ho2Mn8 cuboctahedra that share corners with four equivalent Mn(9)Pr2Ho2Mn8 cuboctahedra, corners with eight equivalent Mn(3)Pr2HoMn9 cuboctahedra, faces with two equivalent Mn(2)Pr3Mn9 cuboctahedra, faces with four equivalent Mn(3)Pr2HoMn9 cuboctahedra, and faces with eight equivalent Mn(8)Pr3HoMn8 cuboctahedra. Both Mn(10)-Mn(1) bond lengths are 2.40 Å. Both Mn(10)-Mn(2) bond lengths are 2.49 Å. All Mn(10)-Mn(7) bond lengths are 2.64 Å. In the second Mn site, Mn(1) is bonded in a distorted q6 geometry to two equivalent Ho(1), one Pr(1), one Mn(10), one Mn(2), one Mn(6), two equivalent Mn(3), two equivalent Mn(7), and two equivalent Mn(8) atoms. The Mn(1)-Mn(2) bond length is 2.38 Å. The Mn(1)-Mn(6) bond length is 2.63 Å. Both Mn(1)-Mn(3) bond lengths are 2.47 Å. Both Mn(1)-Mn(7) bond lengths are 2.57 Å. Both Mn(1)-Mn(8) bond lengths are 2.51 Å. In the third Mn site, Mn(2) is bonded to one Pr(1), two equivalent Pr(2), one Mn(1), one Mn(10), one Mn(5), two equivalent Mn(3), two equivalent Mn(7), and two equivalent Mn(8) atoms to form MnPr3Mn9 cuboctahedra that share corners with two equivalent Mn(9)Pr2Ho2Mn8 cuboctahedra, corners with two equivalent Mn(3)Pr2HoMn9 cuboctahedra, corners with four equivalent Mn(8)Pr3HoMn8 cuboctahedra,  a faceface with one Mn(10)Pr2Ho2Mn8 cuboctahedra,  a faceface with one Mn(9)Pr2Ho2Mn8 cuboctahedra,  a faceface with one Mn(2)Pr3Mn9 cuboctahedra, faces with four equivalent Mn(3)Pr2HoMn9 cuboctahedra, and faces with four equivalent Mn(8)Pr3HoMn8 cuboctahedra. The Mn(2)-Mn(5) bond length is 2.63 Å. Both Mn(2)-Mn(3) bond lengths are 2.43 Å. Both Mn(2)-Mn(7) bond lengths are 2.59 Å. Both Mn(2)-Mn(8) bond lengths are 2.54 Å. In the fourth Mn site, Mn(3) is bonded to one Ho(1), one Pr(1), one Pr(2), one Mn(1), one Mn(2), one Mn(3), one Mn(5), one Mn(6), one Mn(7), one Mn(9), and two equivalent Mn(8) atoms to form distorted MnPr2HoMn9 cuboctahedra that share  a cornercorner with one Mn(2)Pr3Mn9 cuboctahedra, corners with two equivalent Mn(10)Pr2Ho2Mn8 cuboctahedra, corners with four equivalent Mn(3)Pr2HoMn9 cuboctahedra, corners with four equivalent Mn(8)Pr3HoMn8 cuboctahedra,  a faceface with one Mn(10)Pr2Ho2Mn8 cuboctahedra,  a faceface with one Mn(9)Pr2Ho2Mn8 cuboctahedra, faces with two equivalent Mn(3)Pr2HoMn9 cuboctahedra, faces with two equivalent Mn(2)Pr3Mn9 cuboctahedra, and faces with four equivalent Mn(8)Pr3HoMn8 cuboctahedra. The Mn(3)-Mn(3) bond length is 2.44 Å. The Mn(3)-Mn(5) bond length is 2.58 Å. The Mn(3)-Mn(6) bond length is 2.60 Å. The Mn(3)-Mn(7) bond length is 2.61 Å. The Mn(3)-Mn(9) bond length is 2.48 Å. There is one shorter (2.48 Å) and one longer (2.52 Å) Mn(3)-Mn(8) bond length. In the fifth Mn site, Mn(4) is bonded in a body-centered cubic geometry to two equivalent Mn(5), two equivalent Mn(6), and four equivalent Mn(7) atoms. Both Mn(4)-Mn(5) bond lengths are 2.56 Å. Both Mn(4)-Mn(6) bond lengths are 2.60 Å. All Mn(4)-Mn(7) bond lengths are 2.59 Å. In the sixth Mn site, Mn(5) is bonded in a 13-coordinate geometry to two equivalent Ho(1), one Pr(1), one Mn(2), one Mn(4), one Mn(5), one Mn(9), two equivalent Mn(3), two equivalent Mn(7), and two equivalent Mn(8) atoms. The Mn(5)-Mn(5) bond length is 2.93 Å. The Mn(5)-Mn(9) bond length is 2.58 Å. Both Mn(5)-Mn(7) bond lengths are 2.99 Å. Both Mn(5)-Mn(8) bond lengths are 2.65 Å. In the seventh Mn site, Mn(6) is bonded in a 13-coordinate geometry to one Pr(1), two equivalent Pr(2), one Mn(1), one Mn(4), one Mn(6), one Mn(9), two equivalent Mn(3), two equivalent Mn(7), and two equivalent Mn(8) atoms. The Mn(6)-Mn(6) bond length is 2.98 Å. The Mn(6)-Mn(9) bond length is 2.68 Å. Both Mn(6)-Mn(7) bond lengths are 3.01 Å. Both Mn(6)-Mn(8) bond lengths are 2.67 Å. In the eighth Mn site, Mn(7) is bonded in a 13-coordinate geometry to one Ho(1), one Pr(1), one Pr(2), one Mn(1), one Mn(10), one Mn(2), one Mn(3), one Mn(4), one Mn(5), one Mn(6), one Mn(7), and two equivalent Mn(8) atoms. The Mn(7)-Mn(7) bond length is 2.94 Å. There is one shorter (2.62 Å) and one longer (2.69 Å) Mn(7)-Mn(8) bond length. In the ninth Mn site, Mn(8) is bonded to one Ho(1), one Pr(2), two equivalent Pr(1), one Mn(1), one Mn(2), one Mn(5), one Mn(6), two equivalent Mn(3), and two equivalent Mn(7) atoms to form MnPr3HoMn8 cuboctahedra that share corners with two equivalent Mn(2)Pr3Mn9 cuboctahedra, corners with four equivalent Mn(3)Pr2HoMn9 cuboctahedra, corners with four equivalent Mn(8)Pr3HoMn8 cuboctahedra, faces with two equivalent Mn(10)Pr2Ho2Mn8 cuboctahedra, faces with two equivalent Mn(9)Pr2Ho2Mn8 cuboctahedra, faces with two equivalent Mn(2)Pr3Mn9 cuboctahedra, faces with four equivalent Mn(3)Pr2HoMn9 cuboctahedra, and faces with four equivalent Mn(8)Pr3HoMn8 cuboctahedra. In the tenth Mn site, Mn(9) is bonded to two equivalent Ho(1), two equivalent Pr(2), two equivalent Mn(5), two equivalent Mn(6), and four equivalent Mn(3) atoms to form MnPr2Ho2Mn8 cuboctahedra that share corners with four equivalent Mn(10)Pr2Ho2Mn8 cuboctahedra, corners with four equivalent Mn(2)Pr3Mn9 cuboctahedra, faces with two equivalent Mn(2)Pr3Mn9 cuboctahedra, faces with four equivalent Mn(3)Pr2HoMn9 cuboctahedra, and faces with eight equivalent Mn(8)Pr3HoMn8 cuboctahedra.