Pd3Se2S crystallizes in the tetragonal P4_2/mbc space group. There are three inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a rectangular see-saw-like geometry to two equivalent Se(1) and two equivalent S(1) atoms. In the second Pd site, Pd(2) is bonded in a rectangular see-saw-like geometry to two equivalent Se(1) and two equivalent S(1) atoms. In the third Pd site, Pd(3) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Se(1) atoms. Se(1) is bonded to one Pd(1), one Pd(2), and two equivalent Pd(3) atoms to form SePd4 tetrahedra that share corners with four equivalent S(1)Pd4 tetrahedra, corners with six equivalent Se(1)Pd4 tetrahedra, and  an edgeedge with one Se(1)Pd4 tetrahedra. S(1) is bonded to two equivalent Pd(1) and two equivalent Pd(2) atoms to form distorted SPd4 tetrahedra that share corners with two equivalent S(1)Pd4 tetrahedra, corners with eight equivalent Se(1)Pd4 tetrahedra, and  an edgeedge with one S(1)Pd4 tetrahedra.
Pd3Se2S crystallizes in the tetragonal P4_2/mbc space group. There are three inequivalent Pd sites. In the first Pd site, Pd(1) is bonded in a rectangular see-saw-like geometry to two equivalent Se(1) and two equivalent S(1) atoms. Both Pd(1)-Se(1) bond lengths are 2.48 Å. Both Pd(1)-S(1) bond lengths are 2.33 Å. In the second Pd site, Pd(2) is bonded in a rectangular see-saw-like geometry to two equivalent Se(1) and two equivalent S(1) atoms. Both Pd(2)-Se(1) bond lengths are 2.46 Å. Both Pd(2)-S(1) bond lengths are 2.34 Å. In the third Pd site, Pd(3) is bonded in a distorted rectangular see-saw-like geometry to four equivalent Se(1) atoms. There are two shorter (2.45 Å) and two longer (2.47 Å) Pd(3)-Se(1) bond lengths. Se(1) is bonded to one Pd(1), one Pd(2), and two equivalent Pd(3) atoms to form SePd4 tetrahedra that share corners with four equivalent S(1)Pd4 tetrahedra, corners with six equivalent Se(1)Pd4 tetrahedra, and  an edgeedge with one Se(1)Pd4 tetrahedra. S(1) is bonded to two equivalent Pd(1) and two equivalent Pd(2) atoms to form distorted SPd4 tetrahedra that share corners with two equivalent S(1)Pd4 tetrahedra, corners with eight equivalent Se(1)Pd4 tetrahedra, and  an edgeedge with one S(1)Pd4 tetrahedra.