Ho2Pt2O7 crystallizes in the cubic Fd-3m space group. Ho(1) is bonded in a body-centered cubic geometry to two equivalent O(2) and six equivalent O(1) atoms. Pt(1) is bonded to six equivalent O(1) atoms to form corner-sharing PtO6 octahedra. The corner-sharing octahedral tilt angles are 55°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ho(1) and two equivalent Pt(1) atoms to form OHo2Pt2 tetrahedra that share corners with two equivalent O(2)Ho4 tetrahedra, corners with twelve equivalent O(1)Ho2Pt2 tetrahedra,  an edgeedge with one O(2)Ho4 tetrahedra, and edges with four equivalent O(1)Ho2Pt2 tetrahedra. In the second O site, O(2) is bonded to four equivalent Ho(1) atoms to form OHo4 tetrahedra that share corners with four equivalent O(2)Ho4 tetrahedra, corners with twelve equivalent O(1)Ho2Pt2 tetrahedra, and edges with six equivalent O(1)Ho2Pt2 tetrahedra.
Ho2Pt2O7 crystallizes in the cubic Fd-3m space group. Ho(1) is bonded in a body-centered cubic geometry to two equivalent O(2) and six equivalent O(1) atoms. Both Ho(1)-O(2) bond lengths are 2.20 Å. All Ho(1)-O(1) bond lengths are 2.41 Å. Pt(1) is bonded to six equivalent O(1) atoms to form corner-sharing PtO6 octahedra. The corner-sharing octahedral tilt angles are 55°. All Pt(1)-O(1) bond lengths are 2.02 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Ho(1) and two equivalent Pt(1) atoms to form OHo2Pt2 tetrahedra that share corners with two equivalent O(2)Ho4 tetrahedra, corners with twelve equivalent O(1)Ho2Pt2 tetrahedra,  an edgeedge with one O(2)Ho4 tetrahedra, and edges with four equivalent O(1)Ho2Pt2 tetrahedra. In the second O site, O(2) is bonded to four equivalent Ho(1) atoms to form OHo4 tetrahedra that share corners with four equivalent O(2)Ho4 tetrahedra, corners with twelve equivalent O(1)Ho2Pt2 tetrahedra, and edges with six equivalent O(1)Ho2Pt2 tetrahedra.