SrU(SeO4)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 4-coordinate geometry to one O(2), one O(5), one O(7), and two equivalent O(4) atoms. U(1) is bonded in a 3-coordinate geometry to one Se(2), one O(1), one O(2), one O(6), and two equivalent O(3) atoms. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(5), and one O(6) atom. In the second Se site, Se(2) is bonded in a 4-coordinate geometry to one U(1), one O(4), one O(7), and one O(8) atom. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted L-shaped geometry to one U(1) and one Se(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(1), one U(1), one Se(1), and one O(5) atom. In the third O site, O(3) is bonded in a water-like geometry to two equivalent U(1) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Se(2), and one O(7) atom. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(1), one Se(1), and one O(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one U(1), one Se(1), and one O(8) atom. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Sr(1), one Se(2), one O(4), and one O(8) atom. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Se(2), one O(6), and one O(7) atom.
SrU(SeO4)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 4-coordinate geometry to one O(2), one O(5), one O(7), and two equivalent O(4) atoms. The Sr(1)-O(2) bond length is 3.12 Å. The Sr(1)-O(5) bond length is 2.64 Å. The Sr(1)-O(7) bond length is 2.52 Å. There is one shorter (2.28 Å) and one longer (2.69 Å) Sr(1)-O(4) bond length. U(1) is bonded in a 3-coordinate geometry to one Se(2), one O(1), one O(2), one O(6), and two equivalent O(3) atoms. The U(1)-Se(2) bond length is 2.14 Å. The U(1)-O(1) bond length is 2.14 Å. The U(1)-O(2) bond length is 2.39 Å. The U(1)-O(6) bond length is 2.81 Å. There is one shorter (2.72 Å) and one longer (2.77 Å) U(1)-O(3) bond length. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a 4-coordinate geometry to one O(1), one O(2), one O(5), and one O(6) atom. The Se(1)-O(1) bond length is 2.22 Å. The Se(1)-O(2) bond length is 2.23 Å. The Se(1)-O(5) bond length is 2.05 Å. The Se(1)-O(6) bond length is 2.20 Å. In the second Se site, Se(2) is bonded in a 4-coordinate geometry to one U(1), one O(4), one O(7), and one O(8) atom. The Se(2)-O(4) bond length is 2.16 Å. The Se(2)-O(7) bond length is 1.94 Å. The Se(2)-O(8) bond length is 1.81 Å. There are eight inequivalent O sites. In the first O site, O(1) is bonded in a distorted L-shaped geometry to one U(1) and one Se(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Sr(1), one U(1), one Se(1), and one O(5) atom. The O(2)-O(5) bond length is 1.77 Å. In the third O site, O(3) is bonded in a water-like geometry to two equivalent U(1) atoms. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to two equivalent Sr(1), one Se(2), and one O(7) atom. The O(4)-O(7) bond length is 1.76 Å. In the fifth O site, O(5) is bonded in a 3-coordinate geometry to one Sr(1), one Se(1), and one O(2) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one U(1), one Se(1), and one O(8) atom. The O(6)-O(8) bond length is 2.01 Å. In the seventh O site, O(7) is bonded in a 4-coordinate geometry to one Sr(1), one Se(2), one O(4), and one O(8) atom. The O(7)-O(8) bond length is 1.57 Å. In the eighth O site, O(8) is bonded in a distorted single-bond geometry to one Se(2), one O(6), and one O(7) atom.