Ba2TbWO6 crystallizes in the monoclinic C2/m space group. Ba(1) is bonded to four equivalent O(1) and eight equivalent O(2) atoms to form distorted BaO12 cuboctahedra that share corners with twelve equivalent Ba(1)O12 cuboctahedra, faces with six equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Tb(1)O6 octahedra, and faces with four equivalent W(1)O6 octahedra. Tb(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form TbO6 octahedra that share corners with six equivalent W(1)O6 octahedra and faces with eight equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-10°. W(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form WO6 octahedra that share corners with six equivalent Tb(1)O6 octahedra and faces with eight equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-10°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to four equivalent Ba(1), one Tb(1), and one W(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to four equivalent Ba(1), one Tb(1), and one W(1) atom.
Ba2TbWO6 crystallizes in the monoclinic C2/m space group. Ba(1) is bonded to four equivalent O(1) and eight equivalent O(2) atoms to form distorted BaO12 cuboctahedra that share corners with twelve equivalent Ba(1)O12 cuboctahedra, faces with six equivalent Ba(1)O12 cuboctahedra, faces with four equivalent Tb(1)O6 octahedra, and faces with four equivalent W(1)O6 octahedra. There are a spread of Ba(1)-O(1) bond distances ranging from 2.89-3.20 Å. There are a spread of Ba(1)-O(2) bond distances ranging from 2.90-3.14 Å. Tb(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form TbO6 octahedra that share corners with six equivalent W(1)O6 octahedra and faces with eight equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-10°. Both Tb(1)-O(1) bond lengths are 2.28 Å. All Tb(1)-O(2) bond lengths are 2.26 Å. W(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form WO6 octahedra that share corners with six equivalent Tb(1)O6 octahedra and faces with eight equivalent Ba(1)O12 cuboctahedra. The corner-sharing octahedral tilt angles range from 8-10°. Both W(1)-O(1) bond lengths are 1.96 Å. All W(1)-O(2) bond lengths are 2.05 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 2-coordinate geometry to four equivalent Ba(1), one Tb(1), and one W(1) atom. In the second O site, O(2) is bonded in a 6-coordinate geometry to four equivalent Ba(1), one Tb(1), and one W(1) atom.