OsSbSe crystallizes in the monoclinic P2_1/c space group. Os(1) is bonded to three equivalent Sb(1) and three equivalent Se(1) atoms to form distorted OsSb3Se3 octahedra that share corners with eight equivalent Os(1)Sb3Se3 octahedra, corners with three equivalent Sb(1)Os3Se tetrahedra, corners with three equivalent Se(1)SbOs3 tetrahedra, and edges with two equivalent Os(1)Sb3Se3 octahedra. The corner-sharing octahedral tilt angles range from 51-61°. Sb(1) is bonded to three equivalent Os(1) and one Se(1) atom to form distorted SbOs3Se tetrahedra that share corners with three equivalent Os(1)Sb3Se3 octahedra, corners with four equivalent Sb(1)Os3Se tetrahedra, corners with nine equivalent Se(1)SbOs3 tetrahedra, and  an edgeedge with one Sb(1)Os3Se tetrahedra. The corner-sharing octahedral tilt angles range from 68-75°. Se(1) is bonded to three equivalent Os(1) and one Sb(1) atom to form SeSbOs3 tetrahedra that share corners with three equivalent Os(1)Sb3Se3 octahedra, corners with four equivalent Se(1)SbOs3 tetrahedra, corners with nine equivalent Sb(1)Os3Se tetrahedra, and  an edgeedge with one Se(1)SbOs3 tetrahedra. The corner-sharing octahedral tilt angles range from 77-79°.
OsSbSe crystallizes in the monoclinic P2_1/c space group. Os(1) is bonded to three equivalent Sb(1) and three equivalent Se(1) atoms to form distorted OsSb3Se3 octahedra that share corners with eight equivalent Os(1)Sb3Se3 octahedra, corners with three equivalent Sb(1)Os3Se tetrahedra, corners with three equivalent Se(1)SbOs3 tetrahedra, and edges with two equivalent Os(1)Sb3Se3 octahedra. The corner-sharing octahedral tilt angles range from 51-61°. There are a spread of Os(1)-Sb(1) bond distances ranging from 2.65-2.69 Å. There are a spread of Os(1)-Se(1) bond distances ranging from 2.47-2.51 Å. Sb(1) is bonded to three equivalent Os(1) and one Se(1) atom to form distorted SbOs3Se tetrahedra that share corners with three equivalent Os(1)Sb3Se3 octahedra, corners with four equivalent Sb(1)Os3Se tetrahedra, corners with nine equivalent Se(1)SbOs3 tetrahedra, and  an edgeedge with one Sb(1)Os3Se tetrahedra. The corner-sharing octahedral tilt angles range from 68-75°. The Sb(1)-Se(1) bond length is 2.77 Å. Se(1) is bonded to three equivalent Os(1) and one Sb(1) atom to form SeSbOs3 tetrahedra that share corners with three equivalent Os(1)Sb3Se3 octahedra, corners with four equivalent Se(1)SbOs3 tetrahedra, corners with nine equivalent Sb(1)Os3Se tetrahedra, and  an edgeedge with one Se(1)SbOs3 tetrahedra. The corner-sharing octahedral tilt angles range from 77-79°.