Y2Pt2S7 crystallizes in the cubic Fd-3m space group. Y(1) is bonded in a body-centered cubic geometry to two equivalent S(2) and six equivalent S(1) atoms. Pt(1) is bonded to six equivalent S(1) atoms to form corner-sharing PtS6 octahedra. The corner-sharing octahedral tilt angles are 53°. There are two inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Y(1) and two equivalent Pt(1) atoms to form SY2Pt2 tetrahedra that share corners with two equivalent S(2)Y4 tetrahedra, corners with twelve equivalent S(1)Y2Pt2 tetrahedra,  an edgeedge with one S(2)Y4 tetrahedra, and edges with four equivalent S(1)Y2Pt2 tetrahedra. In the second S site, S(2) is bonded to four equivalent Y(1) atoms to form SY4 tetrahedra that share corners with four equivalent S(2)Y4 tetrahedra, corners with twelve equivalent S(1)Y2Pt2 tetrahedra, and edges with six equivalent S(1)Y2Pt2 tetrahedra.
Y2Pt2S7 crystallizes in the cubic Fd-3m space group. Y(1) is bonded in a body-centered cubic geometry to two equivalent S(2) and six equivalent S(1) atoms. Both Y(1)-S(2) bond lengths are 2.65 Å. All Y(1)-S(1) bond lengths are 2.94 Å. Pt(1) is bonded to six equivalent S(1) atoms to form corner-sharing PtS6 octahedra. The corner-sharing octahedral tilt angles are 53°. All Pt(1)-S(1) bond lengths are 2.42 Å. There are two inequivalent S sites. In the first S site, S(1) is bonded to two equivalent Y(1) and two equivalent Pt(1) atoms to form SY2Pt2 tetrahedra that share corners with two equivalent S(2)Y4 tetrahedra, corners with twelve equivalent S(1)Y2Pt2 tetrahedra,  an edgeedge with one S(2)Y4 tetrahedra, and edges with four equivalent S(1)Y2Pt2 tetrahedra. In the second S site, S(2) is bonded to four equivalent Y(1) atoms to form SY4 tetrahedra that share corners with four equivalent S(2)Y4 tetrahedra, corners with twelve equivalent S(1)Y2Pt2 tetrahedra, and edges with six equivalent S(1)Y2Pt2 tetrahedra.