Ba2TbBiO6 crystallizes in the monoclinic C2/m space group. Ba(1) is bonded in a 12-coordinate geometry to four equivalent O(2) and eight equivalent O(1) atoms. Tb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form TbO6 octahedra that share corners with six equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 13-17°. Bi(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form BiO6 octahedra that share corners with six equivalent Tb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 13-17°. 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 Bi(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to four equivalent Ba(1), one Tb(1), and one Bi(1) atom.
Ba2TbBiO6 crystallizes in the monoclinic C2/m space group. Ba(1) is bonded in a 12-coordinate geometry to four equivalent O(2) and eight equivalent O(1) atoms. There are a spread of Ba(1)-O(2) bond distances ranging from 2.79-3.41 Å. There are a spread of Ba(1)-O(1) bond distances ranging from 2.90-3.29 Å. Tb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form TbO6 octahedra that share corners with six equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 13-17°. Both Tb(1)-O(2) bond lengths are 2.26 Å. All Tb(1)-O(1) bond lengths are 2.25 Å. Bi(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form BiO6 octahedra that share corners with six equivalent Tb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 13-17°. Both Bi(1)-O(2) bond lengths are 2.14 Å. All Bi(1)-O(1) bond lengths are 2.14 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 Bi(1) atom. In the second O site, O(2) is bonded in a 3-coordinate geometry to four equivalent Ba(1), one Tb(1), and one Bi(1) atom.