CrNbO4 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 Cr(1)O6 octahedra, and edges with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-54°. Cr(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CrO6 octahedra that share corners with four equivalent Nb(1)O6 octahedra, corners with four equivalent Cr(1)O6 octahedra, and edges with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-50°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Nb(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Nb(1) and two equivalent Cr(1) atoms.
CrNbO4 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 Cr(1)O6 octahedra, and edges with two equivalent Cr(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-54°. Both Nb(1)-O(2) bond lengths are 1.94 Å. There are two shorter (2.02 Å) and two longer (2.07 Å) Nb(1)-O(1) bond lengths. Cr(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form CrO6 octahedra that share corners with four equivalent Nb(1)O6 octahedra, corners with four equivalent Cr(1)O6 octahedra, and edges with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 46-50°. Both Cr(1)-O(1) bond lengths are 1.96 Å. There are two shorter (1.98 Å) and two longer (2.03 Å) Cr(1)-O(2) bond lengths. There are two inequivalent O sites. In the first O site, O(1) is bonded in a trigonal planar geometry to two equivalent Nb(1) and one Cr(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Nb(1) and two equivalent Cr(1) atoms.