Ge(SbTe2)2 crystallizes in the tetragonal I-4m2 space group. Ge(1) is bonded to two equivalent Te(2) and four equivalent Te(1) atoms to form GeTe6 octahedra that share corners with two equivalent Sb(1)Te6 octahedra, corners with four equivalent Ge(1)Te6 octahedra, edges with four equivalent Sb(1)Te6 octahedra, and edges with four equivalent Sb(2)Te6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent Te(2) and four equivalent Te(1) atoms to form SbTe6 octahedra that share corners with two equivalent Ge(1)Te6 octahedra, corners with four equivalent Sb(1)Te6 octahedra, edges with four equivalent Ge(1)Te6 octahedra, and edges with four equivalent Sb(2)Te6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. In the second Sb site, Sb(2) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form SbTe6 octahedra that share corners with four equivalent Sb(2)Te6 octahedra, edges with four equivalent Ge(1)Te6 octahedra, and edges with four equivalent Sb(1)Te6 octahedra. The corner-sharing octahedral tilt angles are 1°. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to two equivalent Ge(1), one Sb(2), and two equivalent Sb(1) atoms to form a mixture of corner and edge-sharing TeGe2Sb3 square pyramids. In the second Te site, Te(2) is bonded in a square co-planar geometry to one Ge(1), one Sb(1), and two equivalent Sb(2) atoms.
Ge(SbTe2)2 crystallizes in the tetragonal I-4m2 space group. Ge(1) is bonded to two equivalent Te(2) and four equivalent Te(1) atoms to form GeTe6 octahedra that share corners with two equivalent Sb(1)Te6 octahedra, corners with four equivalent Ge(1)Te6 octahedra, edges with four equivalent Sb(1)Te6 octahedra, and edges with four equivalent Sb(2)Te6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. Both Ge(1)-Te(2) bond lengths are 3.00 Å. All Ge(1)-Te(1) bond lengths are 3.06 Å. There are two inequivalent Sb sites. In the first Sb site, Sb(1) is bonded to two equivalent Te(2) and four equivalent Te(1) atoms to form SbTe6 octahedra that share corners with two equivalent Ge(1)Te6 octahedra, corners with four equivalent Sb(1)Te6 octahedra, edges with four equivalent Ge(1)Te6 octahedra, and edges with four equivalent Sb(2)Te6 octahedra. The corner-sharing octahedral tilt angles range from 0-1°. Both Sb(1)-Te(2) bond lengths are 3.05 Å. All Sb(1)-Te(1) bond lengths are 3.06 Å. In the second Sb site, Sb(2) is bonded to two equivalent Te(1) and four equivalent Te(2) atoms to form SbTe6 octahedra that share corners with four equivalent Sb(2)Te6 octahedra, edges with four equivalent Ge(1)Te6 octahedra, and edges with four equivalent Sb(1)Te6 octahedra. The corner-sharing octahedral tilt angles are 1°. Both Sb(2)-Te(1) bond lengths are 3.05 Å. All Sb(2)-Te(2) bond lengths are 3.06 Å. There are two inequivalent Te sites. In the first Te site, Te(1) is bonded to two equivalent Ge(1), one Sb(2), and two equivalent Sb(1) atoms to form a mixture of corner and edge-sharing TeGe2Sb3 square pyramids. In the second Te site, Te(2) is bonded in a square co-planar geometry to one Ge(1), one Sb(1), and two equivalent Sb(2) atoms.