Na2UO4 crystallizes in the orthorhombic Pbca space group. Na(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(2) atoms. U(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing UO6 octahedra. The corner-sharing octahedral tilt angles are 37°. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Na(1) and one U(1) atom to form distorted corner-sharing ONa3U tetrahedra. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Na(1) and two equivalent U(1) atoms.
Na2UO4 crystallizes in the orthorhombic Pbca space group. Na(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(2) atoms. There are a spread of Na(1)-O(1) bond distances ranging from 2.28-2.48 Å. There are a spread of Na(1)-O(2) bond distances ranging from 2.37-2.89 Å. U(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing UO6 octahedra. The corner-sharing octahedral tilt angles are 37°. Both U(1)-O(1) bond lengths are 1.93 Å. There are two shorter (2.17 Å) and two longer (2.19 Å) U(1)-O(2) bond lengths. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Na(1) and one U(1) atom to form distorted corner-sharing ONa3U tetrahedra. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Na(1) and two equivalent U(1) atoms.