Ho2MnRuO7 crystallizes in the orthorhombic Imma space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(4), and four equivalent O(3) atoms. In the second Ho site, Ho(2) is bonded in a distorted body-centered cubic geometry to two equivalent O(2), two equivalent O(4), and four equivalent O(3) atoms. Mn(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent Ru(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-51°. Ru(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form RuO6 octahedra that share corners with two equivalent Ru(1)O6 octahedra and corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-54°. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ho(1) and two equivalent Ru(1) atoms to form OHo2Ru2 tetrahedra that share corners with two equivalent O(4)Ho4 tetrahedra, corners with four equivalent O(1)Ho2Ru2 tetrahedra, corners with eight equivalent O(3)Ho2MnRu tetrahedra,  an edgeedge with one O(4)Ho4 tetrahedra, and edges with four equivalent O(3)Ho2MnRu tetrahedra. In the second O site, O(2) is bonded to two equivalent Ho(2) and two equivalent Mn(1) atoms to form distorted OHo2Mn2 tetrahedra that share corners with two equivalent O(4)Ho4 tetrahedra, corners with four equivalent O(2)Ho2Mn2 tetrahedra, corners with eight equivalent O(3)Ho2MnRu tetrahedra,  an edgeedge with one O(4)Ho4 tetrahedra, and edges with four equivalent O(3)Ho2MnRu tetrahedra. In the third O site, O(3) is bonded to one Ho(1), one Ho(2), one Mn(1), and one Ru(1) atom to form distorted OHo2MnRu tetrahedra that share corners with two equivalent O(2)Ho2Mn2 tetrahedra, corners with two equivalent O(1)Ho2Ru2 tetrahedra, corners with two equivalent O(4)Ho4 tetrahedra, corners with eight equivalent O(3)Ho2MnRu tetrahedra,  an edgeedge with one O(2)Ho2Mn2 tetrahedra,  an edgeedge with one O(1)Ho2Ru2 tetrahedra,  an edgeedge with one O(4)Ho4 tetrahedra, and edges with two equivalent O(3)Ho2MnRu tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Ho(1) and two equivalent Ho(2) atoms to form OHo4 tetrahedra that share corners with two equivalent O(2)Ho2Mn2 tetrahedra, corners with two equivalent O(1)Ho2Ru2 tetrahedra, corners with four equivalent O(4)Ho4 tetrahedra, corners with eight equivalent O(3)Ho2MnRu tetrahedra,  an edgeedge with one O(2)Ho2Mn2 tetrahedra,  an edgeedge with one O(1)Ho2Ru2 tetrahedra, and edges with four equivalent O(3)Ho2MnRu tetrahedra.
Ho2MnRuO7 crystallizes in the orthorhombic Imma space group. There are two inequivalent Ho sites. In the first Ho site, Ho(1) is bonded in a body-centered cubic geometry to two equivalent O(1), two equivalent O(4), and four equivalent O(3) atoms. Both Ho(1)-O(1) bond lengths are 2.42 Å. Both Ho(1)-O(4) bond lengths are 2.20 Å. All Ho(1)-O(3) bond lengths are 2.46 Å. In the second Ho site, Ho(2) is bonded in a distorted body-centered cubic geometry to two equivalent O(2), two equivalent O(4), and four equivalent O(3) atoms. Both Ho(2)-O(2) bond lengths are 2.48 Å. Both Ho(2)-O(4) bond lengths are 2.20 Å. All Ho(2)-O(3) bond lengths are 2.45 Å. Mn(1) is bonded to two equivalent O(2) and four equivalent O(3) atoms to form MnO6 octahedra that share corners with two equivalent Mn(1)O6 octahedra and corners with four equivalent Ru(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 50-51°. Both Mn(1)-O(2) bond lengths are 1.97 Å. All Mn(1)-O(3) bond lengths are 1.98 Å. Ru(1) is bonded to two equivalent O(1) and four equivalent O(3) atoms to form RuO6 octahedra that share corners with two equivalent Ru(1)O6 octahedra and corners with four equivalent Mn(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 51-54°. Both Ru(1)-O(1) bond lengths are 2.02 Å. All Ru(1)-O(3) bond lengths are 2.00 Å. There are four inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ho(1) and two equivalent Ru(1) atoms to form OHo2Ru2 tetrahedra that share corners with two equivalent O(4)Ho4 tetrahedra, corners with four equivalent O(1)Ho2Ru2 tetrahedra, corners with eight equivalent O(3)Ho2MnRu tetrahedra,  an edgeedge with one O(4)Ho4 tetrahedra, and edges with four equivalent O(3)Ho2MnRu tetrahedra. In the second O site, O(2) is bonded to two equivalent Ho(2) and two equivalent Mn(1) atoms to form distorted OHo2Mn2 tetrahedra that share corners with two equivalent O(4)Ho4 tetrahedra, corners with four equivalent O(2)Ho2Mn2 tetrahedra, corners with eight equivalent O(3)Ho2MnRu tetrahedra,  an edgeedge with one O(4)Ho4 tetrahedra, and edges with four equivalent O(3)Ho2MnRu tetrahedra. In the third O site, O(3) is bonded to one Ho(1), one Ho(2), one Mn(1), and one Ru(1) atom to form distorted OHo2MnRu tetrahedra that share corners with two equivalent O(2)Ho2Mn2 tetrahedra, corners with two equivalent O(1)Ho2Ru2 tetrahedra, corners with two equivalent O(4)Ho4 tetrahedra, corners with eight equivalent O(3)Ho2MnRu tetrahedra,  an edgeedge with one O(2)Ho2Mn2 tetrahedra,  an edgeedge with one O(1)Ho2Ru2 tetrahedra,  an edgeedge with one O(4)Ho4 tetrahedra, and edges with two equivalent O(3)Ho2MnRu tetrahedra. In the fourth O site, O(4) is bonded to two equivalent Ho(1) and two equivalent Ho(2) atoms to form OHo4 tetrahedra that share corners with two equivalent O(2)Ho2Mn2 tetrahedra, corners with two equivalent O(1)Ho2Ru2 tetrahedra, corners with four equivalent O(4)Ho4 tetrahedra, corners with eight equivalent O(3)Ho2MnRu tetrahedra,  an edgeedge with one O(2)Ho2Mn2 tetrahedra,  an edgeedge with one O(1)Ho2Ru2 tetrahedra, and edges with four equivalent O(3)Ho2MnRu tetrahedra.