Na2UBr6 is beta Vanadium nitride-derived structured and crystallizes in the triclinic P1 space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded to one Br(11), one Br(12), one Br(14), one Br(15), one Br(18), and one Br(2) atom to form NaBr6 octahedra that share corners with two equivalent U(1)Br6 octahedra, corners with two equivalent U(2)Br6 octahedra,  an edgeedge with one Na(4)Br6 octahedra,  an edgeedge with one Na(5)Br6 octahedra,  an edgeedge with one Na(6)Br6 octahedra, and  an edgeedge with one U(3)Br6 octahedra. The corner-sharing octahedral tilt angles range from 46-48°. In the second Na site, Na(2) is bonded to one Br(1), one Br(17), one Br(4), one Br(7), one Br(8), and one Br(9) atom to form NaBr6 octahedra that share corners with two equivalent U(1)Br6 octahedra, corners with two equivalent U(2)Br6 octahedra,  an edgeedge with one Na(4)Br6 octahedra,  an edgeedge with one Na(5)Br6 octahedra,  an edgeedge with one Na(6)Br6 octahedra, and  an edgeedge with one U(3)Br6 octahedra. The corner-sharing octahedral tilt angles range from 45-49°. In the third Na site, Na(3) is bonded to one Br(10), one Br(13), one Br(16), one Br(3), one Br(5), and one Br(6) atom to form NaBr6 octahedra that share corners with two equivalent U(1)Br6 octahedra, corners with two equivalent U(2)Br6 octahedra,  an edgeedge with one Na(4)Br6 octahedra,  an edgeedge with one Na(5)Br6 octahedra,  an edgeedge with one Na(6)Br6 octahedra, and  an edgeedge with one U(3)Br6 octahedra. The corner-sharing octahedral tilt angles range from 46-49°. In the fourth Na site, Na(4) is bonded to one Br(11), one Br(12), one Br(16), one Br(3), one Br(4), and one Br(8) atom to form NaBr6 octahedra that share corners with two equivalent U(1)Br6 octahedra, corners with two equivalent U(2)Br6 octahedra,  an edgeedge with one Na(1)Br6 octahedra,  an edgeedge with one Na(2)Br6 octahedra,  an edgeedge with one Na(3)Br6 octahedra, and  an edgeedge with one U(3)Br6 octahedra. The corner-sharing octahedral tilt angles range from 46-48°. In the fifth Na site, Na(5) is bonded to one Br(1), one Br(14), one Br(15), one Br(5), one Br(6), and one Br(9) atom to form NaBr6 octahedra that share corners with two equivalent U(1)Br6 octahedra, corners with two equivalent U(2)Br6 octahedra,  an edgeedge with one Na(1)Br6 octahedra,  an edgeedge with one Na(2)Br6 octahedra,  an edgeedge with one Na(3)Br6 octahedra, and  an edgeedge with one U(3)Br6 octahedra. The corner-sharing octahedral tilt angles range from 46-49°. In the sixth Na site, Na(6) is bonded to one Br(10), one Br(13), one Br(17), one Br(18), one Br(2), and one Br(7) atom to form NaBr6 octahedra that share corners with two equivalent U(1)Br6 octahedra, corners with two equivalent U(2)Br6 octahedra,  an edgeedge with one Na(1)Br6 octahedra,  an edgeedge with one Na(2)Br6 octahedra,  an edgeedge with one Na(3)Br6 octahedra, and  an edgeedge with one U(3)Br6 octahedra. The corner-sharing octahedral tilt angles range from 47-48°. There are three inequivalent U sites. In the first U site, U(1) is bonded to one Br(1), one Br(12), one Br(13), one Br(14), one Br(3), and one Br(7) atom to form UBr6 octahedra that share corners with two equivalent Na(1)Br6 octahedra, corners with two equivalent Na(2)Br6 octahedra, corners with two equivalent Na(3)Br6 octahedra, corners with two equivalent Na(4)Br6 octahedra, corners with two equivalent Na(5)Br6 octahedra, and corners with two equivalent Na(6)Br6 octahedra. The corner-sharing octahedral tilt angles range from 45-49°. In the second U site, U(2) is bonded to one Br(10), one Br(11), one Br(2), one Br(4), one Br(6), and one Br(9) atom to form UBr6 octahedra that share corners with two equivalent Na(1)Br6 octahedra, corners with two equivalent Na(2)Br6 octahedra, corners with two equivalent Na(3)Br6 octahedra, corners with two equivalent Na(4)Br6 octahedra, corners with two equivalent Na(5)Br6 octahedra, and corners with two equivalent Na(6)Br6 octahedra. The corner-sharing octahedral tilt angles range from 46-49°. In the third U site, U(3) is bonded to one Br(15), one Br(16), one Br(17), one Br(18), one Br(5), and one Br(8) atom to form UBr6 octahedra that share  an edgeedge with one Na(1)Br6 octahedra,  an edgeedge with one Na(2)Br6 octahedra,  an edgeedge with one Na(3)Br6 octahedra,  an edgeedge with one Na(4)Br6 octahedra,  an edgeedge with one Na(5)Br6 octahedra, and  an edgeedge with one Na(6)Br6 octahedra. There are eighteen inequivalent Br sites. In the first Br site, Br(1) is bonded in a distorted T-shaped geometry to one Na(2), one Na(5), and one U(1) atom. In the second Br site, Br(2) is bonded in a distorted T-shaped geometry to one Na(1), one Na(6), and one U(2) atom. In the third Br site, Br(3) is bonded in a distorted T-shaped geometry to one Na(3), one Na(4), and one U(1) atom. In the fourth Br site, Br(4) is bonded in a distorted T-shaped geometry to one Na(2), one Na(4), and one U(2) atom. In the fifth Br site, Br(5) is bonded in a distorted T-shaped geometry to one Na(3), one Na(5), and one U(3) atom. In the sixth Br site, Br(6) is bonded in a distorted T-shaped geometry to one Na(3), one Na(5), and one U(2) atom. In the seventh Br site, Br(7) is bonded in a distorted T-shaped geometry to one Na(2), one Na(6), and one U(1) atom. In the eighth Br site, Br(8) is bonded in a distorted T-shaped geometry to one Na(2), one Na(4), and one U(3) atom. In the ninth Br site, Br(9) is bonded in a distorted T-shaped geometry to one Na(2), one Na(5), and one U(2) atom. In the tenth Br site, Br(10) is bonded in a distorted T-shaped geometry to one Na(3), one Na(6), and one U(2) atom. In the eleventh Br site, Br(11) is bonded in a distorted T-shaped geometry to one Na(1), one Na(4), and one U(2) atom. In the twelfth Br site, Br(12) is bonded in a distorted T-shaped geometry to one Na(1), one Na(4), and one U(1) atom. In the thirteenth Br site, Br(13) is bonded in a distorted T-shaped geometry to one Na(3), one Na(6), and one U(1) atom. In the fourteenth Br site, Br(14) is bonded in a distorted T-shaped geometry to one Na(1), one Na(5), and one U(1) atom. In the fifteenth Br site, Br(15) is bonded in a distorted T-shaped geometry to one Na(1), one Na(5), and one U(3) atom. In the sixteenth Br site, Br(16) is bonded in a distorted T-shaped geometry to one Na(3), one Na(4), and one U(3) atom. In the seventeenth Br site, Br(17) is bonded in a distorted T-shaped geometry to one Na(2), one Na(6), and one U(3) atom. In the eighteenth Br site, Br(18) is bonded in a distorted T-shaped geometry to one Na(1), one Na(6), and one U(3) atom.
Na2UBr6 is beta Vanadium nitride-derived structured and crystallizes in the triclinic P1 space group. There are six inequivalent Na sites. In the first Na site, Na(1) is bonded to one Br(11), one Br(12), one Br(14), one Br(15), one Br(18), and one Br(2) atom to form NaBr6 octahedra that share corners with two equivalent U(1)Br6 octahedra, corners with two equivalent U(2)Br6 octahedra,  an edgeedge with one Na(4)Br6 octahedra,  an edgeedge with one Na(5)Br6 octahedra,  an edgeedge with one Na(6)Br6 octahedra, and  an edgeedge with one U(3)Br6 octahedra. The corner-sharing octahedral tilt angles range from 46-48°. The Na(1)-Br(11) bond length is 2.95 Å. The Na(1)-Br(12) bond length is 2.94 Å. The Na(1)-Br(14) bond length is 3.01 Å. The Na(1)-Br(15) bond length is 2.94 Å. The Na(1)-Br(18) bond length is 2.97 Å. The Na(1)-Br(2) bond length is 2.97 Å. In the second Na site, Na(2) is bonded to one Br(1), one Br(17), one Br(4), one Br(7), one Br(8), and one Br(9) atom to form NaBr6 octahedra that share corners with two equivalent U(1)Br6 octahedra, corners with two equivalent U(2)Br6 octahedra,  an edgeedge with one Na(4)Br6 octahedra,  an edgeedge with one Na(5)Br6 octahedra,  an edgeedge with one Na(6)Br6 octahedra, and  an edgeedge with one U(3)Br6 octahedra. The corner-sharing octahedral tilt angles range from 45-49°. The Na(2)-Br(1) bond length is 2.94 Å. The Na(2)-Br(17) bond length is 2.97 Å. The Na(2)-Br(4) bond length is 3.03 Å. The Na(2)-Br(7) bond length is 3.01 Å. The Na(2)-Br(8) bond length is 2.92 Å. The Na(2)-Br(9) bond length is 2.92 Å. In the third Na site, Na(3) is bonded to one Br(10), one Br(13), one Br(16), one Br(3), one Br(5), and one Br(6) atom to form NaBr6 octahedra that share corners with two equivalent U(1)Br6 octahedra, corners with two equivalent U(2)Br6 octahedra,  an edgeedge with one Na(4)Br6 octahedra,  an edgeedge with one Na(5)Br6 octahedra,  an edgeedge with one Na(6)Br6 octahedra, and  an edgeedge with one U(3)Br6 octahedra. The corner-sharing octahedral tilt angles range from 46-49°. The Na(3)-Br(10) bond length is 2.94 Å. The Na(3)-Br(13) bond length is 2.93 Å. The Na(3)-Br(16) bond length is 2.95 Å. The Na(3)-Br(3) bond length is 3.00 Å. The Na(3)-Br(5) bond length is 2.95 Å. The Na(3)-Br(6) bond length is 3.01 Å. In the fourth Na site, Na(4) is bonded to one Br(11), one Br(12), one Br(16), one Br(3), one Br(4), and one Br(8) atom to form NaBr6 octahedra that share corners with two equivalent U(1)Br6 octahedra, corners with two equivalent U(2)Br6 octahedra,  an edgeedge with one Na(1)Br6 octahedra,  an edgeedge with one Na(2)Br6 octahedra,  an edgeedge with one Na(3)Br6 octahedra, and  an edgeedge with one U(3)Br6 octahedra. The corner-sharing octahedral tilt angles range from 46-48°. The Na(4)-Br(11) bond length is 2.95 Å. The Na(4)-Br(12) bond length is 2.94 Å. The Na(4)-Br(16) bond length is 2.97 Å. The Na(4)-Br(3) bond length is 2.98 Å. The Na(4)-Br(4) bond length is 3.01 Å. The Na(4)-Br(8) bond length is 2.93 Å. In the fifth Na site, Na(5) is bonded to one Br(1), one Br(14), one Br(15), one Br(5), one Br(6), and one Br(9) atom to form NaBr6 octahedra that share corners with two equivalent U(1)Br6 octahedra, corners with two equivalent U(2)Br6 octahedra,  an edgeedge with one Na(1)Br6 octahedra,  an edgeedge with one Na(2)Br6 octahedra,  an edgeedge with one Na(3)Br6 octahedra, and  an edgeedge with one U(3)Br6 octahedra. The corner-sharing octahedral tilt angles range from 46-49°. The Na(5)-Br(1) bond length is 2.95 Å. The Na(5)-Br(14) bond length is 3.01 Å. The Na(5)-Br(15) bond length is 2.92 Å. The Na(5)-Br(5) bond length is 2.98 Å. The Na(5)-Br(6) bond length is 3.02 Å. The Na(5)-Br(9) bond length is 2.91 Å. In the sixth Na site, Na(6) is bonded to one Br(10), one Br(13), one Br(17), one Br(18), one Br(2), and one Br(7) atom to form NaBr6 octahedra that share corners with two equivalent U(1)Br6 octahedra, corners with two equivalent U(2)Br6 octahedra,  an edgeedge with one Na(1)Br6 octahedra,  an edgeedge with one Na(2)Br6 octahedra,  an edgeedge with one Na(3)Br6 octahedra, and  an edgeedge with one U(3)Br6 octahedra. The corner-sharing octahedral tilt angles range from 47-48°. The Na(6)-Br(10) bond length is 2.96 Å. The Na(6)-Br(13) bond length is 2.95 Å. The Na(6)-Br(17) bond length is 2.96 Å. The Na(6)-Br(18) bond length is 2.96 Å. The Na(6)-Br(2) bond length is 2.96 Å. The Na(6)-Br(7) bond length is 2.99 Å. There are three inequivalent U sites. In the first U site, U(1) is bonded to one Br(1), one Br(12), one Br(13), one Br(14), one Br(3), and one Br(7) atom to form UBr6 octahedra that share corners with two equivalent Na(1)Br6 octahedra, corners with two equivalent Na(2)Br6 octahedra, corners with two equivalent Na(3)Br6 octahedra, corners with two equivalent Na(4)Br6 octahedra, corners with two equivalent Na(5)Br6 octahedra, and corners with two equivalent Na(6)Br6 octahedra. The corner-sharing octahedral tilt angles range from 45-49°. The U(1)-Br(1) bond length is 2.79 Å. The U(1)-Br(12) bond length is 2.79 Å. The U(1)-Br(13) bond length is 2.80 Å. The U(1)-Br(14) bond length is 2.78 Å. The U(1)-Br(3) bond length is 2.79 Å. The U(1)-Br(7) bond length is 2.79 Å. In the second U site, U(2) is bonded to one Br(10), one Br(11), one Br(2), one Br(4), one Br(6), and one Br(9) atom to form UBr6 octahedra that share corners with two equivalent Na(1)Br6 octahedra, corners with two equivalent Na(2)Br6 octahedra, corners with two equivalent Na(3)Br6 octahedra, corners with two equivalent Na(4)Br6 octahedra, corners with two equivalent Na(5)Br6 octahedra, and corners with two equivalent Na(6)Br6 octahedra. The corner-sharing octahedral tilt angles range from 46-49°. The U(2)-Br(10) bond length is 2.79 Å. The U(2)-Br(11) bond length is 2.79 Å. The U(2)-Br(2) bond length is 2.81 Å. The U(2)-Br(4) bond length is 2.77 Å. The U(2)-Br(6) bond length is 2.78 Å. The U(2)-Br(9) bond length is 2.82 Å. In the third U site, U(3) is bonded to one Br(15), one Br(16), one Br(17), one Br(18), one Br(5), and one Br(8) atom to form UBr6 octahedra that share  an edgeedge with one Na(1)Br6 octahedra,  an edgeedge with one Na(2)Br6 octahedra,  an edgeedge with one Na(3)Br6 octahedra,  an edgeedge with one Na(4)Br6 octahedra,  an edgeedge with one Na(5)Br6 octahedra, and  an edgeedge with one Na(6)Br6 octahedra. The U(3)-Br(15) bond length is 2.81 Å. The U(3)-Br(16) bond length is 2.78 Å. The U(3)-Br(17) bond length is 2.78 Å. The U(3)-Br(18) bond length is 2.78 Å. The U(3)-Br(5) bond length is 2.78 Å. The U(3)-Br(8) bond length is 2.81 Å. There are eighteen inequivalent Br sites. In the first Br site, Br(1) is bonded in a distorted T-shaped geometry to one Na(2), one Na(5), and one U(1) atom. In the second Br site, Br(2) is bonded in a distorted T-shaped geometry to one Na(1), one Na(6), and one U(2) atom. In the third Br site, Br(3) is bonded in a distorted T-shaped geometry to one Na(3), one Na(4), and one U(1) atom. In the fourth Br site, Br(4) is bonded in a distorted T-shaped geometry to one Na(2), one Na(4), and one U(2) atom. In the fifth Br site, Br(5) is bonded in a distorted T-shaped geometry to one Na(3), one Na(5), and one U(3) atom. In the sixth Br site, Br(6) is bonded in a distorted T-shaped geometry to one Na(3), one Na(5), and one U(2) atom. In the seventh Br site, Br(7) is bonded in a distorted T-shaped geometry to one Na(2), one Na(6), and one U(1) atom. In the eighth Br site, Br(8) is bonded in a distorted T-shaped geometry to one Na(2), one Na(4), and one U(3) atom. In the ninth Br site, Br(9) is bonded in a distorted T-shaped geometry to one Na(2), one Na(5), and one U(2) atom. In the tenth Br site, Br(10) is bonded in a distorted T-shaped geometry to one Na(3), one Na(6), and one U(2) atom. In the eleventh Br site, Br(11) is bonded in a distorted T-shaped geometry to one Na(1), one Na(4), and one U(2) atom. In the twelfth Br site, Br(12) is bonded in a distorted T-shaped geometry to one Na(1), one Na(4), and one U(1) atom. In the thirteenth Br site, Br(13) is bonded in a distorted T-shaped geometry to one Na(3), one Na(6), and one U(1) atom. In the fourteenth Br site, Br(14) is bonded in a distorted T-shaped geometry to one Na(1), one Na(5), and one U(1) atom. In the fifteenth Br site, Br(15) is bonded in a distorted T-shaped geometry to one Na(1), one Na(5), and one U(3) atom. In the sixteenth Br site, Br(16) is bonded in a distorted T-shaped geometry to one Na(3), one Na(4), and one U(3) atom. In the seventeenth Br site, Br(17) is bonded in a distorted T-shaped geometry to one Na(2), one Na(6), and one U(3) atom. In the eighteenth Br site, Br(18) is bonded in a distorted T-shaped geometry to one Na(1), one Na(6), and one U(3) atom.