SrU(SeO5)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), one O(6), one O(9), two equivalent O(10), and two equivalent O(8) atoms. U(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and two equivalent O(5) atoms. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(3), one O(7), and one O(8) atom. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(4), one O(5), and one O(6) atom. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Sr(1) and one U(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one U(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one U(1) and one Se(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(1), one U(1), and one Se(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent U(1) and one Se(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Sr(1) and one Se(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one U(1) and one Se(1) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to two equivalent Sr(1) and one Se(1) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one O(9) atom. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one O(10) atom.
SrU(SeO5)2 crystallizes in the triclinic P-1 space group. Sr(1) is bonded in a 8-coordinate geometry to one O(1), one O(4), one O(6), one O(9), two equivalent O(10), and two equivalent O(8) atoms. The Sr(1)-O(1) bond length is 2.68 Å. The Sr(1)-O(4) bond length is 2.62 Å. The Sr(1)-O(6) bond length is 2.41 Å. The Sr(1)-O(9) bond length is 3.17 Å. There is one shorter (2.88 Å) and one longer (2.94 Å) Sr(1)-O(10) bond length. There is one shorter (2.50 Å) and one longer (2.54 Å) Sr(1)-O(8) bond length. U(1) is bonded in a 7-coordinate geometry to one O(1), one O(2), one O(3), one O(4), one O(7), and two equivalent O(5) atoms. The U(1)-O(1) bond length is 1.86 Å. The U(1)-O(2) bond length is 1.82 Å. The U(1)-O(3) bond length is 2.27 Å. The U(1)-O(4) bond length is 2.62 Å. The U(1)-O(7) bond length is 2.29 Å. There is one shorter (2.37 Å) and one longer (2.48 Å) U(1)-O(5) bond length. There are two inequivalent Se sites. In the first Se site, Se(1) is bonded in a trigonal non-coplanar geometry to one O(3), one O(7), and one O(8) atom. The Se(1)-O(3) bond length is 1.75 Å. The Se(1)-O(7) bond length is 1.73 Å. The Se(1)-O(8) bond length is 1.72 Å. In the second Se site, Se(2) is bonded in a trigonal non-coplanar geometry to one O(4), one O(5), and one O(6) atom. The Se(2)-O(4) bond length is 1.73 Å. The Se(2)-O(5) bond length is 1.79 Å. The Se(2)-O(6) bond length is 1.68 Å. There are ten inequivalent O sites. In the first O site, O(1) is bonded in a distorted linear geometry to one Sr(1) and one U(1) atom. In the second O site, O(2) is bonded in a single-bond geometry to one U(1) atom. In the third O site, O(3) is bonded in a bent 120 degrees geometry to one U(1) and one Se(1) atom. In the fourth O site, O(4) is bonded in a 3-coordinate geometry to one Sr(1), one U(1), and one Se(2) atom. In the fifth O site, O(5) is bonded in a distorted trigonal planar geometry to two equivalent U(1) and one Se(2) atom. In the sixth O site, O(6) is bonded in a bent 120 degrees geometry to one Sr(1) and one Se(2) atom. In the seventh O site, O(7) is bonded in a bent 150 degrees geometry to one U(1) and one Se(1) atom. In the eighth O site, O(8) is bonded in a trigonal planar geometry to two equivalent Sr(1) and one Se(1) atom. In the ninth O site, O(9) is bonded in a distorted bent 120 degrees geometry to one Sr(1) and one O(9) atom. The O(9)-O(9) bond length is 1.23 Å. In the tenth O site, O(10) is bonded in a 3-coordinate geometry to two equivalent Sr(1) and one O(10) atom. The O(10)-O(10) bond length is 1.25 Å.