TmYTe2 is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. Tm(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form TmTe6 octahedra that share corners with six equivalent Tm(1)Te6 octahedra, edges with four equivalent Tm(1)Te6 octahedra, and edges with eight equivalent Y(1)Te6 octahedra. The corner-sharing octahedra are not tilted. Y(1) is bonded to two equivalent Te(2) and four equivalent Te(1) atoms to form YTe6 octahedra that share corners with six equivalent Y(1)Te6 octahedra, edges with four equivalent Y(1)Te6 octahedra, and edges with eight equivalent Tm(1)Te6 octahedra. The corner-sharing octahedra are not tilted. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to two equivalent Tm(1) and four equivalent Y(1) atoms to form TeY4Tm2 octahedra that share corners with six equivalent Te(1)Y4Tm2 octahedra, edges with four equivalent Te(1)Y4Tm2 octahedra, and edges with eight equivalent Te(2)Y2Tm4 octahedra. The corner-sharing octahedra are not tilted. In the second Te site, Te(2) is bonded to four equivalent Tm(1) and two equivalent Y(1) atoms to form TeY2Tm4 octahedra that share corners with six equivalent Te(2)Y2Tm4 octahedra, edges with four equivalent Te(2)Y2Tm4 octahedra, and edges with eight equivalent Te(1)Y4Tm2 octahedra. The corner-sharing octahedra are not tilted.
TmYTe2 is Caswellsilverite-like structured and crystallizes in the tetragonal P4/mmm space group. Tm(1) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form TmTe6 octahedra that share corners with six equivalent Tm(1)Te6 octahedra, edges with four equivalent Tm(1)Te6 octahedra, and edges with eight equivalent Y(1)Te6 octahedra. The corner-sharing octahedra are not tilted. Both Tm(1)-Te(1) bond lengths are 3.07 Å. All Tm(1)-Te(2) bond lengths are 3.06 Å. Y(1) is bonded to two equivalent Te(2) and four equivalent Te(1) atoms to form YTe6 octahedra that share corners with six equivalent Y(1)Te6 octahedra, edges with four equivalent Y(1)Te6 octahedra, and edges with eight equivalent Tm(1)Te6 octahedra. The corner-sharing octahedra are not tilted. Both Y(1)-Te(2) bond lengths are 3.07 Å. All Y(1)-Te(1) bond lengths are 3.06 Å. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to two equivalent Tm(1) and four equivalent Y(1) atoms to form TeY4Tm2 octahedra that share corners with six equivalent Te(1)Y4Tm2 octahedra, edges with four equivalent Te(1)Y4Tm2 octahedra, and edges with eight equivalent Te(2)Y2Tm4 octahedra. The corner-sharing octahedra are not tilted. In the second Te site, Te(2) is bonded to four equivalent Tm(1) and two equivalent Y(1) atoms to form TeY2Tm4 octahedra that share corners with six equivalent Te(2)Y2Tm4 octahedra, edges with four equivalent Te(2)Y2Tm4 octahedra, and edges with eight equivalent Te(1)Y4Tm2 octahedra. The corner-sharing octahedra are not tilted.