Tm2SbTe is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Tm(1) is bonded to three equivalent Sb(1) and three equivalent Te(1) atoms to form a mixture of edge and corner-sharing TmSb3Te3 octahedra. The corner-sharing octahedra are not tilted. Sb(1) is bonded to six equivalent Tm(1) atoms to form SbTm6 octahedra that share corners with six equivalent Te(1)Tm6 octahedra, edges with six equivalent Sb(1)Tm6 octahedra, and edges with six equivalent Te(1)Tm6 octahedra. The corner-sharing octahedral tilt angles are 3°. Te(1) is bonded to six equivalent Tm(1) atoms to form TeTm6 octahedra that share corners with six equivalent Sb(1)Tm6 octahedra, edges with six equivalent Sb(1)Tm6 octahedra, and edges with six equivalent Te(1)Tm6 octahedra. The corner-sharing octahedral tilt angles are 3°.
Tm2SbTe is Caswellsilverite structured and crystallizes in the trigonal R-3m space group. Tm(1) is bonded to three equivalent Sb(1) and three equivalent Te(1) atoms to form a mixture of edge and corner-sharing TmSb3Te3 octahedra. The corner-sharing octahedra are not tilted. All Tm(1)-Sb(1) bond lengths are 3.00 Å. All Tm(1)-Te(1) bond lengths are 3.10 Å. Sb(1) is bonded to six equivalent Tm(1) atoms to form SbTm6 octahedra that share corners with six equivalent Te(1)Tm6 octahedra, edges with six equivalent Sb(1)Tm6 octahedra, and edges with six equivalent Te(1)Tm6 octahedra. The corner-sharing octahedral tilt angles are 3°. Te(1) is bonded to six equivalent Tm(1) atoms to form TeTm6 octahedra that share corners with six equivalent Sb(1)Tm6 octahedra, edges with six equivalent Sb(1)Tm6 octahedra, and edges with six equivalent Te(1)Tm6 octahedra. The corner-sharing octahedral tilt angles are 3°.