RhNbO4 is Hydrophilite-derived structured and crystallizes in the tetragonal I4_1md space group. Nb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NbO6 octahedra that share corners with four equivalent Nb(1)O6 octahedra, corners with four equivalent Rh(1)O6 octahedra, and edges with two equivalent Rh(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-53°. Rh(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form RhO6 octahedra that share corners with four equivalent Nb(1)O6 octahedra, corners with four equivalent Rh(1)O6 octahedra, and edges with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-50°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Nb(1) and one Rh(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Nb(1) and two equivalent Rh(1) atoms.
RhNbO4 is Hydrophilite-derived structured and crystallizes in the tetragonal I4_1md space group. Nb(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form NbO6 octahedra that share corners with four equivalent Nb(1)O6 octahedra, corners with four equivalent Rh(1)O6 octahedra, and edges with two equivalent Rh(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-53°. Both Nb(1)-O(2) bond lengths are 1.93 Å. All Nb(1)-O(1) bond lengths are 2.06 Å. Rh(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form RhO6 octahedra that share corners with four equivalent Nb(1)O6 octahedra, corners with four equivalent Rh(1)O6 octahedra, and edges with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 43-50°. Both Rh(1)-O(1) bond lengths are 2.02 Å. There are two shorter (1.98 Å) and two longer (2.08 Å) Rh(1)-O(2) bond lengths. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Nb(1) and one Rh(1) atom. In the second O site, O(2) is bonded in a distorted T-shaped geometry to one Nb(1) and two equivalent Rh(1) atoms.