MgUB2O7 crystallizes in the orthorhombic Pbcm space group. Mg(1) is bonded in an octahedral geometry to one O(1), one O(2), one O(3), one O(6), and two equivalent O(4) atoms. U(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(2), one O(5), and one O(6) atom. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(5) atom. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one U(1), and one B(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mg(1), one U(1), and one B(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one U(1), and one B(2) atom. In the fourth O site, O(4) is bonded in a linear geometry to one Mg(1) and one U(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one U(1), one B(1), and one B(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mg(1), one U(1), and one B(1) atom.
MgUB2O7 crystallizes in the orthorhombic Pbcm space group. Mg(1) is bonded in an octahedral geometry to one O(1), one O(2), one O(3), one O(6), and two equivalent O(4) atoms. The Mg(1)-O(1) bond length is 2.04 Å. The Mg(1)-O(2) bond length is 2.11 Å. The Mg(1)-O(3) bond length is 2.06 Å. The Mg(1)-O(6) bond length is 2.05 Å. Both Mg(1)-O(4) bond lengths are 2.17 Å. U(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(5), one O(6), and two equivalent O(4) atoms. The U(1)-O(1) bond length is 2.37 Å. The U(1)-O(2) bond length is 2.32 Å. The U(1)-O(3) bond length is 2.34 Å. The U(1)-O(5) bond length is 2.61 Å. The U(1)-O(6) bond length is 2.35 Å. Both U(1)-O(4) bond lengths are 1.84 Å. There are two inequivalent B sites. In the first B site, B(1) is bonded in a trigonal planar geometry to one O(2), one O(5), and one O(6) atom. The B(1)-O(2) bond length is 1.35 Å. The B(1)-O(5) bond length is 1.43 Å. The B(1)-O(6) bond length is 1.36 Å. In the second B site, B(2) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(5) atom. The B(2)-O(1) bond length is 1.37 Å. The B(2)-O(3) bond length is 1.37 Å. The B(2)-O(5) bond length is 1.41 Å. There are six inequivalent O sites. In the first O site, O(1) is bonded in a 3-coordinate geometry to one Mg(1), one U(1), and one B(2) atom. In the second O site, O(2) is bonded in a distorted trigonal planar geometry to one Mg(1), one U(1), and one B(1) atom. In the third O site, O(3) is bonded in a 3-coordinate geometry to one Mg(1), one U(1), and one B(2) atom. In the fourth O site, O(4) is bonded in a linear geometry to one Mg(1) and one U(1) atom. In the fifth O site, O(5) is bonded in a distorted bent 120 degrees geometry to one U(1), one B(1), and one B(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Mg(1), one U(1), and one B(1) atom.