UNb3O10 crystallizes in the orthorhombic Fddd space group. U(1) is bonded in a distorted linear geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 0-38°. In the second Nb site, Nb(2) is bonded to two equivalent O(4) and four equivalent O(3) atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 0-38°. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one U(1) and two equivalent Nb(1) atoms. In the second O site, O(2) is bonded in a linear geometry to one U(1) and one Nb(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one U(1), one Nb(1), and one Nb(2) atom. In the fourth O site, O(2) is bonded in a linear geometry to one U(1) and one Nb(1) atom. In the fifth O site, O(4) is bonded in a linear geometry to one Nb(1) and one Nb(2) atom.
UNb3O10 crystallizes in the orthorhombic Fddd space group. U(1) is bonded in a distorted linear geometry to two equivalent O(1), two equivalent O(2), and four equivalent O(3) atoms. Both U(1)-O(1) bond lengths are 2.65 Å. Both U(1)-O(2) bond lengths are 1.87 Å. All U(1)-O(3) bond lengths are 2.62 Å. There are two inequivalent Nb sites. In the first Nb site, Nb(1) is bonded to one O(2), one O(4), two equivalent O(1), and two equivalent O(3) atoms to form distorted corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 0-38°. The Nb(1)-O(2) bond length is 2.35 Å. The Nb(1)-O(4) bond length is 1.86 Å. Both Nb(1)-O(1) bond lengths are 1.99 Å. Both Nb(1)-O(3) bond lengths are 1.99 Å. In the second Nb site, Nb(2) is bonded to two equivalent O(4) and four equivalent O(3) atoms to form corner-sharing NbO6 octahedra. The corner-sharing octahedral tilt angles range from 0-38°. Both Nb(2)-O(4) bond lengths are 2.00 Å. All Nb(2)-O(3) bond lengths are 1.99 Å. There are five inequivalent O sites. In the first O site, O(1) is bonded in a distorted bent 150 degrees geometry to one U(1) and two equivalent Nb(1) atoms. In the second O site, O(2) is bonded in a linear geometry to one U(1) and one Nb(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one U(1), one Nb(1), and one Nb(2) atom. In the fourth O site, O(2) is bonded in a linear geometry to one U(1) and one Nb(1) atom. The O(2)-U(1) bond length is 1.87 Å. The O(2)-Nb(1) bond length is 2.35 Å. In the fifth O site, O(4) is bonded in a linear geometry to one Nb(1) and one Nb(2) atom.