TbEu2SnO6 crystallizes in the cubic Pn-3 space group. Tb(1) is bonded to six equivalent O(1) atoms to form TbO6 octahedra that share corners with six equivalent Sn(1)O6 octahedra and faces with two equivalent Eu(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 30°. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to twelve equivalent O(1) atoms to form EuO12 cuboctahedra that share faces with four equivalent Tb(1)O6 octahedra and faces with four equivalent Sn(1)O6 octahedra. In the second Eu site, Eu(2) is bonded in a distorted square co-planar geometry to four equivalent O(1) atoms. Sn(1) is bonded to six equivalent O(1) atoms to form SnO6 octahedra that share corners with six equivalent Tb(1)O6 octahedra and faces with two equivalent Eu(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 30°. O(1) is bonded in a 3-coordinate geometry to one Tb(1), one Eu(1), one Eu(2), and one Sn(1) atom.
TbEu2SnO6 crystallizes in the cubic Pn-3 space group. Tb(1) is bonded to six equivalent O(1) atoms to form TbO6 octahedra that share corners with six equivalent Sn(1)O6 octahedra and faces with two equivalent Eu(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 30°. All Tb(1)-O(1) bond lengths are 2.25 Å. There are two inequivalent Eu sites. In the first Eu site, Eu(1) is bonded to twelve equivalent O(1) atoms to form EuO12 cuboctahedra that share faces with four equivalent Tb(1)O6 octahedra and faces with four equivalent Sn(1)O6 octahedra. All Eu(1)-O(1) bond lengths are 2.96 Å. In the second Eu site, Eu(2) is bonded in a distorted square co-planar geometry to four equivalent O(1) atoms. All Eu(2)-O(1) bond lengths are 2.40 Å. Sn(1) is bonded to six equivalent O(1) atoms to form SnO6 octahedra that share corners with six equivalent Tb(1)O6 octahedra and faces with two equivalent Eu(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles are 30°. All Sn(1)-O(1) bond lengths are 2.09 Å. O(1) is bonded in a 3-coordinate geometry to one Tb(1), one Eu(1), one Eu(2), and one Sn(1) atom.