BiNbO4 crystallizes in the monoclinic C2 space group. Nb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles are 17°. Bi(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Nb(1) and one Bi(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Nb(1) and two equivalent Bi(1) atoms.
BiNbO4 crystallizes in the monoclinic C2 space group. Nb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles are 17°. Both Nb(1)-O(2) bond lengths are 1.98 Å. There are two shorter (1.88 Å) and two longer (2.37 Å) Nb(1)-O(1) bond lengths. Bi(1) is bonded in a 6-coordinate geometry to two equivalent O(1) and four equivalent O(2) atoms. Both Bi(1)-O(1) bond lengths are 2.56 Å. There are two shorter (2.22 Å) and two longer (2.34 Å) Bi(1)-O(2) bond lengths. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to two equivalent Nb(1) and one Bi(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Nb(1) and two equivalent Bi(1) atoms.