FeTaO4 is Hydrophilite-derived structured and crystallizes in the orthorhombic Pna2_1 space group. Ta(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form TaO6 octahedra that share corners with four equivalent Ta(1)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. Fe(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form FeO6 octahedra that share corners with four equivalent Ta(1)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, and edges with two equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Fe(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ta(1) and two equivalent Fe(1) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ta(1) and two equivalent Fe(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Fe(1) atom.
FeTaO4 is Hydrophilite-derived structured and crystallizes in the orthorhombic Pna2_1 space group. Ta(1) is bonded to one O(2), one O(3), two equivalent O(1), and two equivalent O(4) atoms to form TaO6 octahedra that share corners with four equivalent Ta(1)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. The Ta(1)-O(2) bond length is 1.92 Å. The Ta(1)-O(3) bond length is 2.02 Å. There is one shorter (1.97 Å) and one longer (2.13 Å) Ta(1)-O(1) bond length. There is one shorter (1.97 Å) and one longer (2.07 Å) Ta(1)-O(4) bond length. Fe(1) is bonded to one O(1), one O(4), two equivalent O(2), and two equivalent O(3) atoms to form FeO6 octahedra that share corners with four equivalent Ta(1)O6 octahedra, corners with four equivalent Fe(1)O6 octahedra, and edges with two equivalent Ta(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-54°. The Fe(1)-O(1) bond length is 2.04 Å. The Fe(1)-O(4) bond length is 2.15 Å. There is one shorter (2.00 Å) and one longer (2.15 Å) Fe(1)-O(2) bond length. There is one shorter (1.96 Å) and one longer (2.04 Å) Fe(1)-O(3) bond length. There are four inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Fe(1) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Ta(1) and two equivalent Fe(1) atoms. In the third O site, O(3) is bonded in a trigonal planar geometry to one Ta(1) and two equivalent Fe(1) atoms. In the fourth O site, O(4) is bonded in a distorted trigonal planar geometry to two equivalent Ta(1) and one Fe(1) atom.