Ba2BiTaO6 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. Ta(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form TaO6 octahedra that share corners with six equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 15-20°. 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 Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 15-20°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to four equivalent Ba(1), one Ta(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 Ta(1), and one Bi(1) atom.
Ba2BiTaO6 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 2.75-3.43 Å. There are a spread of Ba(1)-O(1) bond distances ranging from 2.84-3.31 Å. Ta(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form TaO6 octahedra that share corners with six equivalent Bi(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 15-20°. Both Ta(1)-O(2) bond lengths are 2.02 Å. All Ta(1)-O(1) bond lengths are 2.01 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 Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 15-20°. Both Bi(1)-O(2) bond lengths are 2.36 Å. All Bi(1)-O(1) bond lengths are 2.36 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 6-coordinate geometry to four equivalent Ba(1), one Ta(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 Ta(1), and one Bi(1) atom.