FeNbO4 is Hydrophilite-derived structured and crystallizes in the monoclinic P2/c space group. Nb(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form distorted NbO6 octahedra that share corners with eight equivalent Fe(1)O6 octahedra and edges with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-57°. Fe(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form FeO6 octahedra that share corners with eight equivalent Nb(1)O6 octahedra and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-57°. There are two inequivalent O sites. In the first O site, O(2) is bonded in a trigonal planar geometry to two equivalent Nb(1) and one Fe(1) atom. In the second O site, O(1) is bonded in a trigonal planar geometry to one Nb(1) and two equivalent Fe(1) atoms.
FeNbO4 is Hydrophilite-derived structured and crystallizes in the monoclinic P2/c space group. Nb(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form distorted NbO6 octahedra that share corners with eight equivalent Fe(1)O6 octahedra and edges with two equivalent Nb(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-57°. Both Nb(1)-O(1) bond lengths are 1.94 Å. There are two shorter (1.99 Å) and two longer (2.15 Å) Nb(1)-O(2) bond lengths. Fe(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form FeO6 octahedra that share corners with eight equivalent Nb(1)O6 octahedra and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-57°. Both Fe(1)-O(2) bond lengths are 1.98 Å. All Fe(1)-O(1) bond lengths are 1.96 Å. There are two inequivalent O sites. In the first O site, O(2) is bonded in a trigonal planar geometry to two equivalent Nb(1) and one Fe(1) atom. In the second O site, O(1) is bonded in a trigonal planar geometry to one Nb(1) and two equivalent Fe(1) atoms.