FeUO4 is Hydrophilite-derived structured and crystallizes in the orthorhombic Pbcn space group. U(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form UO6 octahedra that share corners with four equivalent U(1)O6 octahedra, corners with six equivalent Fe(1)O6 octahedra, and  an edgeedge with one Fe(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 six equivalent U(1)O6 octahedra,  an edgeedge with one U(1)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-57°. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one U(1) and two equivalent Fe(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent U(1) and one Fe(1) atom.
FeUO4 is Hydrophilite-derived structured and crystallizes in the orthorhombic Pbcn space group. U(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form UO6 octahedra that share corners with four equivalent U(1)O6 octahedra, corners with six equivalent Fe(1)O6 octahedra, and  an edgeedge with one Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 47-57°. Both U(1)-O(1) bond lengths are 2.13 Å. There are two shorter (2.16 Å) and two longer (2.25 Å) U(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 six equivalent U(1)O6 octahedra,  an edgeedge with one U(1)O6 octahedra, and edges with two equivalent Fe(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 48-57°. Both Fe(1)-O(2) bond lengths are 2.06 Å. All Fe(1)-O(1) bond lengths are 2.03 Å. There are two inequivalent O sites. In the first O site, O(1) is bonded in a distorted trigonal planar geometry to one U(1) and two equivalent Fe(1) atoms. In the second O site, O(2) is bonded in a trigonal planar geometry to two equivalent U(1) and one Fe(1) atom.