La2Pt2O7 crystallizes in the cubic Fd-3m space group. La(1) is bonded to two equivalent O(2) and six equivalent O(1) atoms to form distorted LaO8 hexagonal bipyramids that share edges with six equivalent La(1)O8 hexagonal bipyramids and edges with six equivalent Pt(1)O6 octahedra. Pt(1) is bonded to six equivalent O(1) atoms to form PtO6 octahedra that share corners with six equivalent Pt(1)O6 octahedra and edges with six equivalent La(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 50°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent La(1) and two equivalent Pt(1) atoms to form distorted OLa2Pt2 tetrahedra that share corners with two equivalent O(2)La4 tetrahedra, corners with twelve equivalent O(1)La2Pt2 tetrahedra,  an edgeedge with one O(2)La4 tetrahedra, and edges with four equivalent O(1)La2Pt2 tetrahedra. In the second O site, O(2) is bonded to four equivalent La(1) atoms to form OLa4 tetrahedra that share corners with four equivalent O(2)La4 tetrahedra, corners with twelve equivalent O(1)La2Pt2 tetrahedra, and edges with six equivalent O(1)La2Pt2 tetrahedra.
La2Pt2O7 crystallizes in the cubic Fd-3m space group. La(1) is bonded to two equivalent O(2) and six equivalent O(1) atoms to form distorted LaO8 hexagonal bipyramids that share edges with six equivalent La(1)O8 hexagonal bipyramids and edges with six equivalent Pt(1)O6 octahedra. Both La(1)-O(2) bond lengths are 2.28 Å. All La(1)-O(1) bond lengths are 2.57 Å. Pt(1) is bonded to six equivalent O(1) atoms to form PtO6 octahedra that share corners with six equivalent Pt(1)O6 octahedra and edges with six equivalent La(1)O8 hexagonal bipyramids. The corner-sharing octahedral tilt angles are 50°. All Pt(1)-O(1) bond lengths are 2.05 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent La(1) and two equivalent Pt(1) atoms to form distorted OLa2Pt2 tetrahedra that share corners with two equivalent O(2)La4 tetrahedra, corners with twelve equivalent O(1)La2Pt2 tetrahedra,  an edgeedge with one O(2)La4 tetrahedra, and edges with four equivalent O(1)La2Pt2 tetrahedra. In the second O site, O(2) is bonded to four equivalent La(1) atoms to form OLa4 tetrahedra that share corners with four equivalent O(2)La4 tetrahedra, corners with twelve equivalent O(1)La2Pt2 tetrahedra, and edges with six equivalent O(1)La2Pt2 tetrahedra.