U3O10 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent U sites. In the first U site, U(1) is bonded in a 6-coordinate geometry to one O(2), one O(5), one O(6), one O(7), and two equivalent O(1) atoms. In the second U site, U(2) is bonded in a distorted octahedral geometry to one O(10), one O(3), one O(4), one O(7), one O(8), and one O(9) atom. In the third U site, U(3) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(5), one O(6), one O(8), and one O(9) atom. There are ten inequivalent O sites. In the first O site, O(6) is bonded in a water-like geometry to one U(1) and one U(3) atom. In the second O site, O(7) is bonded in a distorted bent 150 degrees geometry to one U(1) and one U(2) atom. In the third O site, O(8) is bonded in a distorted bent 150 degrees geometry to one U(2) and one U(3) atom. In the fourth O site, O(1) is bonded in a distorted trigonal planar geometry to one U(3) and two equivalent U(1) atoms. In the fifth O site, O(9) is bonded in a bent 150 degrees geometry to one U(2) and one U(3) atom. In the sixth O site, O(2) is bonded in a water-like geometry to one U(1) and one U(3) atom. In the seventh O site, O(10) is bonded in a single-bond geometry to one U(2) atom. In the eighth O site, O(3) is bonded in a single-bond geometry to one U(2) atom. In the ninth O site, O(4) is bonded in a single-bond geometry to one U(2) atom. In the tenth O site, O(5) is bonded in a bent 120 degrees geometry to one U(1) and one U(3) atom.
U3O10 crystallizes in the monoclinic P2_1/c space group. There are three inequivalent U sites. In the first U site, U(1) is bonded in a 6-coordinate geometry to one O(2), one O(5), one O(6), one O(7), and two equivalent O(1) atoms. The U(1)-O(2) bond length is 2.19 Å. The U(1)-O(5) bond length is 1.91 Å. The U(1)-O(6) bond length is 2.12 Å. The U(1)-O(7) bond length is 1.87 Å. There is one shorter (2.41 Å) and one longer (2.45 Å) U(1)-O(1) bond length. In the second U site, U(2) is bonded in a distorted octahedral geometry to one O(10), one O(3), one O(4), one O(7), one O(8), and one O(9) atom. The U(2)-O(10) bond length is 1.88 Å. The U(2)-O(3) bond length is 1.84 Å. The U(2)-O(4) bond length is 1.85 Å. The U(2)-O(7) bond length is 2.43 Å. The U(2)-O(8) bond length is 2.31 Å. The U(2)-O(9) bond length is 2.12 Å. In the third U site, U(3) is bonded in a 6-coordinate geometry to one O(1), one O(2), one O(5), one O(6), one O(8), and one O(9) atom. The U(3)-O(1) bond length is 2.15 Å. The U(3)-O(2) bond length is 2.04 Å. The U(3)-O(5) bond length is 2.34 Å. The U(3)-O(6) bond length is 2.10 Å. The U(3)-O(8) bond length is 1.97 Å. The U(3)-O(9) bond length is 2.08 Å. There are ten inequivalent O sites. In the first O site, O(6) is bonded in a water-like geometry to one U(1) and one U(3) atom. In the second O site, O(7) is bonded in a distorted bent 150 degrees geometry to one U(1) and one U(2) atom. In the third O site, O(8) is bonded in a distorted bent 150 degrees geometry to one U(2) and one U(3) atom. In the fourth O site, O(1) is bonded in a distorted trigonal planar geometry to one U(3) and two equivalent U(1) atoms. In the fifth O site, O(9) is bonded in a bent 150 degrees geometry to one U(2) and one U(3) atom. In the sixth O site, O(2) is bonded in a water-like geometry to one U(1) and one U(3) atom. In the seventh O site, O(10) is bonded in a single-bond geometry to one U(2) atom. In the eighth O site, O(3) is bonded in a single-bond geometry to one U(2) atom. In the ninth O site, O(4) is bonded in a single-bond geometry to one U(2) atom. In the tenth O site, O(5) is bonded in a bent 120 degrees geometry to one U(1) and one U(3) atom.