Sr5U5O19 crystallizes in the triclinic P1 space group. There are five inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted body-centered cubic geometry to one O(15), one O(18), one O(2), one O(3), one O(4), one O(5), one O(8), and one O(9) atom. In the second Sr site, Sr(2) is bonded in a distorted body-centered cubic geometry to one O(1), one O(11), one O(14), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. In the third Sr site, Sr(3) is bonded in a body-centered cubic geometry to one O(10), one O(14), one O(15), one O(16), one O(17), one O(18), one O(19), and one O(6) atom. In the fourth Sr site, Sr(4) is bonded in a distorted body-centered cubic geometry to one O(13), one O(14), one O(16), one O(17), one O(3), one O(4), one O(6), and one O(7) atom. In the fifth Sr site, Sr(5) is bonded to one O(12), one O(15), one O(16), one O(17), one O(18), one O(2), and one O(5) atom to form distorted SrO7 hexagonal pyramids that share  a cornercorner with one U(1)O7 pentagonal bipyramid,  a cornercorner with one U(4)O7 pentagonal bipyramid,  a cornercorner with one U(5)O7 pentagonal bipyramid, and  an edgeedge with one U(5)O7 pentagonal bipyramid. There are five inequivalent U sites. In the first U site, U(1) is bonded to one O(10), one O(11), one O(13), one O(15), one O(4), one O(8), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share  a cornercorner with one Sr(5)O7 hexagonal pyramid,  a cornercorner with one U(4)O7 pentagonal bipyramid,  a cornercorner with one U(5)O7 pentagonal bipyramid,  an edgeedge with one U(4)O7 pentagonal bipyramid, and  an edgeedge with one U(5)O7 pentagonal bipyramid. In the second U site, U(2) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(12), one O(14), one O(18), one O(19), and one O(7) atom. In the third U site, U(3) is bonded in a 8-coordinate geometry to one O(1), one O(12), one O(13), one O(17), one O(19), one O(3), one O(7), and one O(9) atom. In the fourth U site, U(4) is bonded to one O(1), one O(11), one O(13), one O(19), one O(2), one O(6), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share  a cornercorner with one Sr(5)O7 hexagonal pyramid,  a cornercorner with one U(1)O7 pentagonal bipyramid,  a cornercorner with one U(5)O7 pentagonal bipyramid, and  an edgeedge with one U(1)O7 pentagonal bipyramid. In the fifth U site, U(5) is bonded to one O(10), one O(11), one O(12), one O(16), one O(5), one O(7), and one O(8) atom to form distorted UO7 pentagonal bipyramids that share  a cornercorner with one Sr(5)O7 hexagonal pyramid,  a cornercorner with one U(1)O7 pentagonal bipyramid,  a cornercorner with one U(4)O7 pentagonal bipyramid,  an edgeedge with one Sr(5)O7 hexagonal pyramid, and  an edgeedge with one U(1)O7 pentagonal bipyramid. There are nineteen inequivalent O sites. In the first O site, O(1) is bonded to one Sr(2), one U(2), one U(3), and one U(4) atom to form OSrU3 tetrahedra that share  a cornercorner with one O(17)Sr3U tetrahedra,  a cornercorner with one O(18)Sr3U tetrahedra,  a cornercorner with one O(4)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(10)SrU3 tetrahedra,  a cornercorner with one O(19)SrU3 tetrahedra, corners with two equivalent O(6)Sr3U tetrahedra, corners with two equivalent O(7)SrU3 tetrahedra, corners with two equivalent O(9)SrU3 tetrahedra, corners with two equivalent O(11)SrU3 trigonal pyramids,  an edgeedge with one O(14)Sr3U tetrahedra,  an edgeedge with one O(2)Sr3U tetrahedra,  an edgeedge with one O(3)Sr3U tetrahedra,  an edgeedge with one O(12)SrU3 tetrahedra, and  an edgeedge with one O(19)SrU3 tetrahedra. In the second O site, O(2) is bonded to one Sr(1), one Sr(2), one Sr(5), and one U(4) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(14)Sr3U tetrahedra,  a cornercorner with one O(16)Sr3U tetrahedra,  a cornercorner with one O(17)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(12)SrU3 tetrahedra,  a cornercorner with one O(19)SrU3 tetrahedra, corners with two equivalent O(15)Sr3U tetrahedra, corners with two equivalent O(3)Sr3U tetrahedra, corners with two equivalent O(6)Sr3U tetrahedra, corners with two equivalent O(11)SrU3 trigonal pyramids,  an edgeedge with one O(18)Sr3U tetrahedra,  an edgeedge with one O(4)Sr3U tetrahedra,  an edgeedge with one O(5)Sr3U tetrahedra,  an edgeedge with one O(1)SrU3 tetrahedra, and  an edgeedge with one O(9)SrU3 tetrahedra. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), one Sr(4), and one U(3) atom to form OSr3U tetrahedra that share  a cornercorner with one O(15)Sr3U tetrahedra,  a cornercorner with one O(16)Sr3U tetrahedra,  a cornercorner with one O(18)Sr3U tetrahedra,  a cornercorner with one O(4)Sr3U tetrahedra,  a cornercorner with one O(12)SrU3 tetrahedra,  a cornercorner with one O(19)SrU3 tetrahedra, corners with two equivalent O(14)Sr3U tetrahedra, corners with two equivalent O(17)Sr3U tetrahedra, corners with two equivalent O(2)Sr3U tetrahedra,  a cornercorner with one O(11)SrU3 trigonal pyramid,  an edgeedge with one O(4)Sr3U tetrahedra,  an edgeedge with one O(5)Sr3U tetrahedra,  an edgeedge with one O(6)Sr3U tetrahedra,  an edgeedge with one O(1)SrU3 tetrahedra,  an edgeedge with one O(7)SrU3 tetrahedra, and  an edgeedge with one O(9)SrU3 tetrahedra. In the fourth O site, O(4) is bonded to one Sr(1), one Sr(2), one Sr(4), and one U(1) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(16)Sr3U tetrahedra,  a cornercorner with one O(17)Sr3U tetrahedra,  a cornercorner with one O(18)Sr3U tetrahedra,  a cornercorner with one O(3)Sr3U tetrahedra,  a cornercorner with one O(1)SrU3 tetrahedra,  a cornercorner with one O(10)SrU3 tetrahedra,  a cornercorner with one O(7)SrU3 tetrahedra, corners with two equivalent O(15)Sr3U tetrahedra, corners with two equivalent O(5)Sr3U tetrahedra, corners with two equivalent O(6)Sr3U tetrahedra, corners with two equivalent O(9)SrU3 tetrahedra,  an edgeedge with one O(14)Sr3U tetrahedra,  an edgeedge with one O(2)Sr3U tetrahedra,  an edgeedge with one O(3)Sr3U tetrahedra, and  an edgeedge with one O(11)SrU3 trigonal pyramid. In the fifth O site, O(5) is bonded to one Sr(1), one Sr(2), one Sr(5), and one U(5) atom to form OSr3U tetrahedra that share  a cornercorner with one O(14)Sr3U tetrahedra,  a cornercorner with one O(17)Sr3U tetrahedra,  a cornercorner with one O(2)Sr3U tetrahedra,  a cornercorner with one O(6)Sr3U tetrahedra,  a cornercorner with one O(1)SrU3 tetrahedra,  a cornercorner with one O(10)SrU3 tetrahedra,  a cornercorner with one O(7)SrU3 tetrahedra,  a cornercorner with one O(9)SrU3 tetrahedra, corners with two equivalent O(16)Sr3U tetrahedra, corners with two equivalent O(18)Sr3U tetrahedra, corners with two equivalent O(4)Sr3U tetrahedra,  an edgeedge with one O(15)Sr3U tetrahedra,  an edgeedge with one O(2)Sr3U tetrahedra,  an edgeedge with one O(3)Sr3U tetrahedra,  an edgeedge with one O(12)SrU3 tetrahedra, and  an edgeedge with one O(11)SrU3 trigonal pyramid. In the sixth O site, O(6) is bonded to one Sr(2), one Sr(3), one Sr(4), and one U(4) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(14)Sr3U tetrahedra,  a cornercorner with one O(15)Sr3U tetrahedra,  a cornercorner with one O(18)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(10)SrU3 tetrahedra,  a cornercorner with one O(7)SrU3 tetrahedra,  a cornercorner with one O(9)SrU3 tetrahedra, corners with two equivalent O(17)Sr3U tetrahedra, corners with two equivalent O(2)Sr3U tetrahedra, corners with two equivalent O(4)Sr3U tetrahedra, corners with two equivalent O(1)SrU3 tetrahedra,  an edgeedge with one O(14)Sr3U tetrahedra,  an edgeedge with one O(16)Sr3U tetrahedra,  an edgeedge with one O(3)Sr3U tetrahedra,  an edgeedge with one O(19)SrU3 tetrahedra, and  an edgeedge with one O(11)SrU3 trigonal pyramid. In the seventh O site, O(7) is bonded to one Sr(4), one U(2), one U(3), and one U(5) atom to form distorted OSrU3 tetrahedra that share  a cornercorner with one O(18)Sr3U tetrahedra,  a cornercorner with one O(4)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(6)Sr3U tetrahedra,  a cornercorner with one O(12)SrU3 tetrahedra,  a cornercorner with one O(9)SrU3 tetrahedra, corners with two equivalent O(17)Sr3U tetrahedra, corners with two equivalent O(1)SrU3 tetrahedra, corners with two equivalent O(10)SrU3 tetrahedra,  a cornercorner with one O(11)SrU3 trigonal pyramid,  an edgeedge with one O(14)Sr3U tetrahedra,  an edgeedge with one O(16)Sr3U tetrahedra,  an edgeedge with one O(3)Sr3U tetrahedra,  an edgeedge with one O(12)SrU3 tetrahedra, and  an edgeedge with one O(19)SrU3 tetrahedra. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Sr(1), one U(1), and one U(5) atom. In the ninth O site, O(9) is bonded to one Sr(1), one U(1), one U(3), and one U(4) atom to form distorted OSrU3 tetrahedra that share  a cornercorner with one O(17)Sr3U tetrahedra,  a cornercorner with one O(18)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(6)Sr3U tetrahedra,  a cornercorner with one O(10)SrU3 tetrahedra,  a cornercorner with one O(12)SrU3 tetrahedra,  a cornercorner with one O(7)SrU3 tetrahedra, corners with two equivalent O(4)Sr3U tetrahedra, corners with two equivalent O(1)SrU3 tetrahedra,  an edgeedge with one O(15)Sr3U tetrahedra,  an edgeedge with one O(2)Sr3U tetrahedra,  an edgeedge with one O(3)Sr3U tetrahedra,  an edgeedge with one O(19)SrU3 tetrahedra, and  an edgeedge with one O(11)SrU3 trigonal pyramid. In the tenth O site, O(10) is bonded to one Sr(3), one U(1), one U(2), and one U(5) atom to form distorted OSrU3 tetrahedra that share  a cornercorner with one O(17)Sr3U tetrahedra,  a cornercorner with one O(4)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(6)Sr3U tetrahedra,  a cornercorner with one O(1)SrU3 tetrahedra,  a cornercorner with one O(9)SrU3 tetrahedra, corners with two equivalent O(18)Sr3U tetrahedra, corners with two equivalent O(19)SrU3 tetrahedra, corners with two equivalent O(7)SrU3 tetrahedra,  an edgeedge with one O(14)Sr3U tetrahedra,  an edgeedge with one O(15)Sr3U tetrahedra,  an edgeedge with one O(16)Sr3U tetrahedra,  an edgeedge with one O(12)SrU3 tetrahedra, and  an edgeedge with one O(11)SrU3 trigonal pyramid. In the eleventh O site, O(11) is bonded to one Sr(2), one U(1), one U(4), and one U(5) atom to form distorted OSrU3 trigonal pyramids that share  a cornercorner with one O(14)Sr3U tetrahedra,  a cornercorner with one O(15)Sr3U tetrahedra,  a cornercorner with one O(16)Sr3U tetrahedra,  a cornercorner with one O(3)Sr3U tetrahedra,  a cornercorner with one O(12)SrU3 tetrahedra,  a cornercorner with one O(19)SrU3 tetrahedra,  a cornercorner with one O(7)SrU3 tetrahedra, corners with two equivalent O(2)Sr3U tetrahedra, corners with two equivalent O(1)SrU3 tetrahedra,  an edgeedge with one O(4)Sr3U tetrahedra,  an edgeedge with one O(5)Sr3U tetrahedra,  an edgeedge with one O(6)Sr3U tetrahedra,  an edgeedge with one O(10)SrU3 tetrahedra, and  an edgeedge with one O(9)SrU3 tetrahedra. In the twelfth O site, O(12) is bonded to one Sr(5), one U(2), one U(3), and one U(5) atom to form OSrU3 tetrahedra that share  a cornercorner with one O(14)Sr3U tetrahedra,  a cornercorner with one O(15)Sr3U tetrahedra,  a cornercorner with one O(2)Sr3U tetrahedra,  a cornercorner with one O(3)Sr3U tetrahedra,  a cornercorner with one O(7)SrU3 tetrahedra,  a cornercorner with one O(9)SrU3 tetrahedra, corners with two equivalent O(16)Sr3U tetrahedra, corners with two equivalent O(19)SrU3 tetrahedra,  a cornercorner with one O(11)SrU3 trigonal pyramid,  an edgeedge with one O(17)Sr3U tetrahedra,  an edgeedge with one O(18)Sr3U tetrahedra,  an edgeedge with one O(5)Sr3U tetrahedra,  an edgeedge with one O(1)SrU3 tetrahedra,  an edgeedge with one O(10)SrU3 tetrahedra, and  an edgeedge with one O(7)SrU3 tetrahedra. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Sr(4), one U(1), one U(3), and one U(4) atom. In the fourteenth O site, O(14) is bonded to one Sr(2), one Sr(3), one Sr(4), and one U(2) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(15)Sr3U tetrahedra,  a cornercorner with one O(2)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(6)Sr3U tetrahedra,  a cornercorner with one O(12)SrU3 tetrahedra, corners with two equivalent O(16)Sr3U tetrahedra, corners with two equivalent O(18)Sr3U tetrahedra, corners with two equivalent O(3)Sr3U tetrahedra, corners with two equivalent O(19)SrU3 tetrahedra,  a cornercorner with one O(11)SrU3 trigonal pyramid,  an edgeedge with one O(17)Sr3U tetrahedra,  an edgeedge with one O(4)Sr3U tetrahedra,  an edgeedge with one O(6)Sr3U tetrahedra,  an edgeedge with one O(1)SrU3 tetrahedra,  an edgeedge with one O(10)SrU3 tetrahedra, and  an edgeedge with one O(7)SrU3 tetrahedra. In the fifteenth O site, O(15) is bonded to one Sr(1), one Sr(3), one Sr(5), and one U(1) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(14)Sr3U tetrahedra,  a cornercorner with one O(18)Sr3U tetrahedra,  a cornercorner with one O(3)Sr3U tetrahedra,  a cornercorner with one O(6)Sr3U tetrahedra,  a cornercorner with one O(12)SrU3 tetrahedra,  a cornercorner with one O(19)SrU3 tetrahedra, corners with two equivalent O(16)Sr3U tetrahedra, corners with two equivalent O(2)Sr3U tetrahedra, corners with two equivalent O(4)Sr3U tetrahedra,  a cornercorner with one O(11)SrU3 trigonal pyramid,  an edgeedge with one O(17)Sr3U tetrahedra,  an edgeedge with one O(18)Sr3U tetrahedra,  an edgeedge with one O(5)Sr3U tetrahedra,  an edgeedge with one O(10)SrU3 tetrahedra, and  an edgeedge with one O(9)SrU3 tetrahedra. In the sixteenth O site, O(16) is bonded to one Sr(3), one Sr(4), one Sr(5), and one U(5) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(17)Sr3U tetrahedra,  a cornercorner with one O(2)Sr3U tetrahedra,  a cornercorner with one O(3)Sr3U tetrahedra,  a cornercorner with one O(4)Sr3U tetrahedra,  a cornercorner with one O(19)SrU3 tetrahedra, corners with two equivalent O(14)Sr3U tetrahedra, corners with two equivalent O(15)Sr3U tetrahedra, corners with two equivalent O(5)Sr3U tetrahedra, corners with two equivalent O(12)SrU3 tetrahedra,  a cornercorner with one O(11)SrU3 trigonal pyramid,  an edgeedge with one O(17)Sr3U tetrahedra,  an edgeedge with one O(18)Sr3U tetrahedra,  an edgeedge with one O(6)Sr3U tetrahedra,  an edgeedge with one O(10)SrU3 tetrahedra, and  an edgeedge with one O(7)SrU3 tetrahedra. In the seventeenth O site, O(17) is bonded to one Sr(3), one Sr(4), one Sr(5), and one U(3) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(16)Sr3U tetrahedra,  a cornercorner with one O(2)Sr3U tetrahedra,  a cornercorner with one O(4)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(1)SrU3 tetrahedra,  a cornercorner with one O(10)SrU3 tetrahedra,  a cornercorner with one O(9)SrU3 tetrahedra, corners with two equivalent O(18)Sr3U tetrahedra, corners with two equivalent O(3)Sr3U tetrahedra, corners with two equivalent O(6)Sr3U tetrahedra, corners with two equivalent O(7)SrU3 tetrahedra,  an edgeedge with one O(14)Sr3U tetrahedra,  an edgeedge with one O(15)Sr3U tetrahedra,  an edgeedge with one O(16)Sr3U tetrahedra,  an edgeedge with one O(12)SrU3 tetrahedra, and  an edgeedge with one O(19)SrU3 tetrahedra. In the eighteenth O site, O(18) is bonded to one Sr(1), one Sr(3), one Sr(5), and one U(2) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(15)Sr3U tetrahedra,  a cornercorner with one O(3)Sr3U tetrahedra,  a cornercorner with one O(4)Sr3U tetrahedra,  a cornercorner with one O(6)Sr3U tetrahedra,  a cornercorner with one O(1)SrU3 tetrahedra,  a cornercorner with one O(7)SrU3 tetrahedra,  a cornercorner with one O(9)SrU3 tetrahedra, corners with two equivalent O(14)Sr3U tetrahedra, corners with two equivalent O(17)Sr3U tetrahedra, corners with two equivalent O(5)Sr3U tetrahedra, corners with two equivalent O(10)SrU3 tetrahedra,  an edgeedge with one O(15)Sr3U tetrahedra,  an edgeedge with one O(16)Sr3U tetrahedra,  an edgeedge with one O(2)Sr3U tetrahedra,  an edgeedge with one O(12)SrU3 tetrahedra, and  an edgeedge with one O(19)SrU3 tetrahedra. In the nineteenth O site, O(19) is bonded to one Sr(3), one U(2), one U(3), and one U(4) atom to form OSrU3 tetrahedra that share  a cornercorner with one O(15)Sr3U tetrahedra,  a cornercorner with one O(16)Sr3U tetrahedra,  a cornercorner with one O(2)Sr3U tetrahedra,  a cornercorner with one O(3)Sr3U tetrahedra,  a cornercorner with one O(1)SrU3 tetrahedra, corners with two equivalent O(14)Sr3U tetrahedra, corners with two equivalent O(10)SrU3 tetrahedra, corners with two equivalent O(12)SrU3 tetrahedra,  a cornercorner with one O(11)SrU3 trigonal pyramid,  an edgeedge with one O(17)Sr3U tetrahedra,  an edgeedge with one O(18)Sr3U tetrahedra,  an edgeedge with one O(6)Sr3U tetrahedra,  an edgeedge with one O(1)SrU3 tetrahedra,  an edgeedge with one O(7)SrU3 tetrahedra, and  an edgeedge with one O(9)SrU3 tetrahedra.
Sr5U5O19 crystallizes in the triclinic P1 space group. There are five inequivalent Sr sites. In the first Sr site, Sr(1) is bonded in a distorted body-centered cubic geometry to one O(15), one O(18), one O(2), one O(3), one O(4), one O(5), one O(8), and one O(9) atom. The Sr(1)-O(15) bond length is 2.60 Å. The Sr(1)-O(18) bond length is 2.52 Å. The Sr(1)-O(2) bond length is 2.59 Å. The Sr(1)-O(3) bond length is 2.49 Å. The Sr(1)-O(4) bond length is 2.59 Å. The Sr(1)-O(5) bond length is 2.57 Å. The Sr(1)-O(8) bond length is 2.83 Å. The Sr(1)-O(9) bond length is 2.72 Å. In the second Sr site, Sr(2) is bonded in a distorted body-centered cubic geometry to one O(1), one O(11), one O(14), one O(2), one O(3), one O(4), one O(5), and one O(6) atom. The Sr(2)-O(1) bond length is 2.59 Å. The Sr(2)-O(11) bond length is 2.85 Å. The Sr(2)-O(14) bond length is 2.57 Å. The Sr(2)-O(2) bond length is 2.64 Å. The Sr(2)-O(3) bond length is 2.49 Å. The Sr(2)-O(4) bond length is 2.43 Å. The Sr(2)-O(5) bond length is 2.54 Å. The Sr(2)-O(6) bond length is 2.59 Å. In the third Sr site, Sr(3) is bonded in a body-centered cubic geometry to one O(10), one O(14), one O(15), one O(16), one O(17), one O(18), one O(19), and one O(6) atom. The Sr(3)-O(10) bond length is 2.68 Å. The Sr(3)-O(14) bond length is 2.58 Å. The Sr(3)-O(15) bond length is 2.54 Å. The Sr(3)-O(16) bond length is 2.57 Å. The Sr(3)-O(17) bond length is 2.54 Å. The Sr(3)-O(18) bond length is 2.64 Å. The Sr(3)-O(19) bond length is 2.61 Å. The Sr(3)-O(6) bond length is 2.52 Å. In the fourth Sr site, Sr(4) is bonded in a distorted body-centered cubic geometry to one O(13), one O(14), one O(16), one O(17), one O(3), one O(4), one O(6), and one O(7) atom. The Sr(4)-O(13) bond length is 2.76 Å. The Sr(4)-O(14) bond length is 2.59 Å. The Sr(4)-O(16) bond length is 2.67 Å. The Sr(4)-O(17) bond length is 2.47 Å. The Sr(4)-O(3) bond length is 2.47 Å. The Sr(4)-O(4) bond length is 2.60 Å. The Sr(4)-O(6) bond length is 2.57 Å. The Sr(4)-O(7) bond length is 2.66 Å. In the fifth Sr site, Sr(5) is bonded to one O(12), one O(15), one O(16), one O(17), one O(18), one O(2), and one O(5) atom to form distorted SrO7 hexagonal pyramids that share  a cornercorner with one U(1)O7 pentagonal bipyramid,  a cornercorner with one U(4)O7 pentagonal bipyramid,  a cornercorner with one U(5)O7 pentagonal bipyramid, and  an edgeedge with one U(5)O7 pentagonal bipyramid. The Sr(5)-O(12) bond length is 2.54 Å. The Sr(5)-O(15) bond length is 2.51 Å. The Sr(5)-O(16) bond length is 2.51 Å. The Sr(5)-O(17) bond length is 2.55 Å. The Sr(5)-O(18) bond length is 2.58 Å. The Sr(5)-O(2) bond length is 2.57 Å. The Sr(5)-O(5) bond length is 2.47 Å. There are five inequivalent U sites. In the first U site, U(1) is bonded to one O(10), one O(11), one O(13), one O(15), one O(4), one O(8), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share  a cornercorner with one Sr(5)O7 hexagonal pyramid,  a cornercorner with one U(4)O7 pentagonal bipyramid,  a cornercorner with one U(5)O7 pentagonal bipyramid,  an edgeedge with one U(4)O7 pentagonal bipyramid, and  an edgeedge with one U(5)O7 pentagonal bipyramid. The U(1)-O(10) bond length is 2.33 Å. The U(1)-O(11) bond length is 2.59 Å. The U(1)-O(13) bond length is 2.24 Å. The U(1)-O(15) bond length is 2.01 Å. The U(1)-O(4) bond length is 2.01 Å. The U(1)-O(8) bond length is 2.21 Å. The U(1)-O(9) bond length is 2.30 Å. In the second U site, U(2) is bonded in a 7-coordinate geometry to one O(1), one O(10), one O(12), one O(14), one O(18), one O(19), and one O(7) atom. The U(2)-O(1) bond length is 2.35 Å. The U(2)-O(10) bond length is 2.30 Å. The U(2)-O(12) bond length is 2.29 Å. The U(2)-O(14) bond length is 1.94 Å. The U(2)-O(18) bond length is 1.96 Å. The U(2)-O(19) bond length is 2.24 Å. The U(2)-O(7) bond length is 2.26 Å. In the third U site, U(3) is bonded in a 8-coordinate geometry to one O(1), one O(12), one O(13), one O(17), one O(19), one O(3), one O(7), and one O(9) atom. The U(3)-O(1) bond length is 2.33 Å. The U(3)-O(12) bond length is 2.34 Å. The U(3)-O(13) bond length is 2.80 Å. The U(3)-O(17) bond length is 2.00 Å. The U(3)-O(19) bond length is 2.34 Å. The U(3)-O(3) bond length is 2.01 Å. The U(3)-O(7) bond length is 2.45 Å. The U(3)-O(9) bond length is 2.32 Å. In the fourth U site, U(4) is bonded to one O(1), one O(11), one O(13), one O(19), one O(2), one O(6), and one O(9) atom to form distorted UO7 pentagonal bipyramids that share  a cornercorner with one Sr(5)O7 hexagonal pyramid,  a cornercorner with one U(1)O7 pentagonal bipyramid,  a cornercorner with one U(5)O7 pentagonal bipyramid, and  an edgeedge with one U(1)O7 pentagonal bipyramid. The U(4)-O(1) bond length is 2.26 Å. The U(4)-O(11) bond length is 2.24 Å. The U(4)-O(13) bond length is 2.15 Å. The U(4)-O(19) bond length is 2.31 Å. The U(4)-O(2) bond length is 1.98 Å. The U(4)-O(6) bond length is 1.98 Å. The U(4)-O(9) bond length is 2.24 Å. In the fifth U site, U(5) is bonded to one O(10), one O(11), one O(12), one O(16), one O(5), one O(7), and one O(8) atom to form distorted UO7 pentagonal bipyramids that share  a cornercorner with one Sr(5)O7 hexagonal pyramid,  a cornercorner with one U(1)O7 pentagonal bipyramid,  a cornercorner with one U(4)O7 pentagonal bipyramid,  an edgeedge with one Sr(5)O7 hexagonal pyramid, and  an edgeedge with one U(1)O7 pentagonal bipyramid. The U(5)-O(10) bond length is 2.29 Å. The U(5)-O(11) bond length is 2.23 Å. The U(5)-O(12) bond length is 2.27 Å. The U(5)-O(16) bond length is 1.98 Å. The U(5)-O(5) bond length is 1.98 Å. The U(5)-O(7) bond length is 2.26 Å. The U(5)-O(8) bond length is 2.14 Å. There are nineteen inequivalent O sites. In the first O site, O(1) is bonded to one Sr(2), one U(2), one U(3), and one U(4) atom to form OSrU3 tetrahedra that share  a cornercorner with one O(17)Sr3U tetrahedra,  a cornercorner with one O(18)Sr3U tetrahedra,  a cornercorner with one O(4)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(10)SrU3 tetrahedra,  a cornercorner with one O(19)SrU3 tetrahedra, corners with two equivalent O(6)Sr3U tetrahedra, corners with two equivalent O(7)SrU3 tetrahedra, corners with two equivalent O(9)SrU3 tetrahedra, corners with two equivalent O(11)SrU3 trigonal pyramids,  an edgeedge with one O(14)Sr3U tetrahedra,  an edgeedge with one O(2)Sr3U tetrahedra,  an edgeedge with one O(3)Sr3U tetrahedra,  an edgeedge with one O(12)SrU3 tetrahedra, and  an edgeedge with one O(19)SrU3 tetrahedra. In the second O site, O(2) is bonded to one Sr(1), one Sr(2), one Sr(5), and one U(4) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(14)Sr3U tetrahedra,  a cornercorner with one O(16)Sr3U tetrahedra,  a cornercorner with one O(17)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(12)SrU3 tetrahedra,  a cornercorner with one O(19)SrU3 tetrahedra, corners with two equivalent O(15)Sr3U tetrahedra, corners with two equivalent O(3)Sr3U tetrahedra, corners with two equivalent O(6)Sr3U tetrahedra, corners with two equivalent O(11)SrU3 trigonal pyramids,  an edgeedge with one O(18)Sr3U tetrahedra,  an edgeedge with one O(4)Sr3U tetrahedra,  an edgeedge with one O(5)Sr3U tetrahedra,  an edgeedge with one O(1)SrU3 tetrahedra, and  an edgeedge with one O(9)SrU3 tetrahedra. In the third O site, O(3) is bonded to one Sr(1), one Sr(2), one Sr(4), and one U(3) atom to form OSr3U tetrahedra that share  a cornercorner with one O(15)Sr3U tetrahedra,  a cornercorner with one O(16)Sr3U tetrahedra,  a cornercorner with one O(18)Sr3U tetrahedra,  a cornercorner with one O(4)Sr3U tetrahedra,  a cornercorner with one O(12)SrU3 tetrahedra,  a cornercorner with one O(19)SrU3 tetrahedra, corners with two equivalent O(14)Sr3U tetrahedra, corners with two equivalent O(17)Sr3U tetrahedra, corners with two equivalent O(2)Sr3U tetrahedra,  a cornercorner with one O(11)SrU3 trigonal pyramid,  an edgeedge with one O(4)Sr3U tetrahedra,  an edgeedge with one O(5)Sr3U tetrahedra,  an edgeedge with one O(6)Sr3U tetrahedra,  an edgeedge with one O(1)SrU3 tetrahedra,  an edgeedge with one O(7)SrU3 tetrahedra, and  an edgeedge with one O(9)SrU3 tetrahedra. In the fourth O site, O(4) is bonded to one Sr(1), one Sr(2), one Sr(4), and one U(1) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(16)Sr3U tetrahedra,  a cornercorner with one O(17)Sr3U tetrahedra,  a cornercorner with one O(18)Sr3U tetrahedra,  a cornercorner with one O(3)Sr3U tetrahedra,  a cornercorner with one O(1)SrU3 tetrahedra,  a cornercorner with one O(10)SrU3 tetrahedra,  a cornercorner with one O(7)SrU3 tetrahedra, corners with two equivalent O(15)Sr3U tetrahedra, corners with two equivalent O(5)Sr3U tetrahedra, corners with two equivalent O(6)Sr3U tetrahedra, corners with two equivalent O(9)SrU3 tetrahedra,  an edgeedge with one O(14)Sr3U tetrahedra,  an edgeedge with one O(2)Sr3U tetrahedra,  an edgeedge with one O(3)Sr3U tetrahedra, and  an edgeedge with one O(11)SrU3 trigonal pyramid. In the fifth O site, O(5) is bonded to one Sr(1), one Sr(2), one Sr(5), and one U(5) atom to form OSr3U tetrahedra that share  a cornercorner with one O(14)Sr3U tetrahedra,  a cornercorner with one O(17)Sr3U tetrahedra,  a cornercorner with one O(2)Sr3U tetrahedra,  a cornercorner with one O(6)Sr3U tetrahedra,  a cornercorner with one O(1)SrU3 tetrahedra,  a cornercorner with one O(10)SrU3 tetrahedra,  a cornercorner with one O(7)SrU3 tetrahedra,  a cornercorner with one O(9)SrU3 tetrahedra, corners with two equivalent O(16)Sr3U tetrahedra, corners with two equivalent O(18)Sr3U tetrahedra, corners with two equivalent O(4)Sr3U tetrahedra,  an edgeedge with one O(15)Sr3U tetrahedra,  an edgeedge with one O(2)Sr3U tetrahedra,  an edgeedge with one O(3)Sr3U tetrahedra,  an edgeedge with one O(12)SrU3 tetrahedra, and  an edgeedge with one O(11)SrU3 trigonal pyramid. In the sixth O site, O(6) is bonded to one Sr(2), one Sr(3), one Sr(4), and one U(4) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(14)Sr3U tetrahedra,  a cornercorner with one O(15)Sr3U tetrahedra,  a cornercorner with one O(18)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(10)SrU3 tetrahedra,  a cornercorner with one O(7)SrU3 tetrahedra,  a cornercorner with one O(9)SrU3 tetrahedra, corners with two equivalent O(17)Sr3U tetrahedra, corners with two equivalent O(2)Sr3U tetrahedra, corners with two equivalent O(4)Sr3U tetrahedra, corners with two equivalent O(1)SrU3 tetrahedra,  an edgeedge with one O(14)Sr3U tetrahedra,  an edgeedge with one O(16)Sr3U tetrahedra,  an edgeedge with one O(3)Sr3U tetrahedra,  an edgeedge with one O(19)SrU3 tetrahedra, and  an edgeedge with one O(11)SrU3 trigonal pyramid. In the seventh O site, O(7) is bonded to one Sr(4), one U(2), one U(3), and one U(5) atom to form distorted OSrU3 tetrahedra that share  a cornercorner with one O(18)Sr3U tetrahedra,  a cornercorner with one O(4)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(6)Sr3U tetrahedra,  a cornercorner with one O(12)SrU3 tetrahedra,  a cornercorner with one O(9)SrU3 tetrahedra, corners with two equivalent O(17)Sr3U tetrahedra, corners with two equivalent O(1)SrU3 tetrahedra, corners with two equivalent O(10)SrU3 tetrahedra,  a cornercorner with one O(11)SrU3 trigonal pyramid,  an edgeedge with one O(14)Sr3U tetrahedra,  an edgeedge with one O(16)Sr3U tetrahedra,  an edgeedge with one O(3)Sr3U tetrahedra,  an edgeedge with one O(12)SrU3 tetrahedra, and  an edgeedge with one O(19)SrU3 tetrahedra. In the eighth O site, O(8) is bonded in a distorted bent 150 degrees geometry to one Sr(1), one U(1), and one U(5) atom. In the ninth O site, O(9) is bonded to one Sr(1), one U(1), one U(3), and one U(4) atom to form distorted OSrU3 tetrahedra that share  a cornercorner with one O(17)Sr3U tetrahedra,  a cornercorner with one O(18)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(6)Sr3U tetrahedra,  a cornercorner with one O(10)SrU3 tetrahedra,  a cornercorner with one O(12)SrU3 tetrahedra,  a cornercorner with one O(7)SrU3 tetrahedra, corners with two equivalent O(4)Sr3U tetrahedra, corners with two equivalent O(1)SrU3 tetrahedra,  an edgeedge with one O(15)Sr3U tetrahedra,  an edgeedge with one O(2)Sr3U tetrahedra,  an edgeedge with one O(3)Sr3U tetrahedra,  an edgeedge with one O(19)SrU3 tetrahedra, and  an edgeedge with one O(11)SrU3 trigonal pyramid. In the tenth O site, O(10) is bonded to one Sr(3), one U(1), one U(2), and one U(5) atom to form distorted OSrU3 tetrahedra that share  a cornercorner with one O(17)Sr3U tetrahedra,  a cornercorner with one O(4)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(6)Sr3U tetrahedra,  a cornercorner with one O(1)SrU3 tetrahedra,  a cornercorner with one O(9)SrU3 tetrahedra, corners with two equivalent O(18)Sr3U tetrahedra, corners with two equivalent O(19)SrU3 tetrahedra, corners with two equivalent O(7)SrU3 tetrahedra,  an edgeedge with one O(14)Sr3U tetrahedra,  an edgeedge with one O(15)Sr3U tetrahedra,  an edgeedge with one O(16)Sr3U tetrahedra,  an edgeedge with one O(12)SrU3 tetrahedra, and  an edgeedge with one O(11)SrU3 trigonal pyramid. In the eleventh O site, O(11) is bonded to one Sr(2), one U(1), one U(4), and one U(5) atom to form distorted OSrU3 trigonal pyramids that share  a cornercorner with one O(14)Sr3U tetrahedra,  a cornercorner with one O(15)Sr3U tetrahedra,  a cornercorner with one O(16)Sr3U tetrahedra,  a cornercorner with one O(3)Sr3U tetrahedra,  a cornercorner with one O(12)SrU3 tetrahedra,  a cornercorner with one O(19)SrU3 tetrahedra,  a cornercorner with one O(7)SrU3 tetrahedra, corners with two equivalent O(2)Sr3U tetrahedra, corners with two equivalent O(1)SrU3 tetrahedra,  an edgeedge with one O(4)Sr3U tetrahedra,  an edgeedge with one O(5)Sr3U tetrahedra,  an edgeedge with one O(6)Sr3U tetrahedra,  an edgeedge with one O(10)SrU3 tetrahedra, and  an edgeedge with one O(9)SrU3 tetrahedra. In the twelfth O site, O(12) is bonded to one Sr(5), one U(2), one U(3), and one U(5) atom to form OSrU3 tetrahedra that share  a cornercorner with one O(14)Sr3U tetrahedra,  a cornercorner with one O(15)Sr3U tetrahedra,  a cornercorner with one O(2)Sr3U tetrahedra,  a cornercorner with one O(3)Sr3U tetrahedra,  a cornercorner with one O(7)SrU3 tetrahedra,  a cornercorner with one O(9)SrU3 tetrahedra, corners with two equivalent O(16)Sr3U tetrahedra, corners with two equivalent O(19)SrU3 tetrahedra,  a cornercorner with one O(11)SrU3 trigonal pyramid,  an edgeedge with one O(17)Sr3U tetrahedra,  an edgeedge with one O(18)Sr3U tetrahedra,  an edgeedge with one O(5)Sr3U tetrahedra,  an edgeedge with one O(1)SrU3 tetrahedra,  an edgeedge with one O(10)SrU3 tetrahedra, and  an edgeedge with one O(7)SrU3 tetrahedra. In the thirteenth O site, O(13) is bonded in a 4-coordinate geometry to one Sr(4), one U(1), one U(3), and one U(4) atom. In the fourteenth O site, O(14) is bonded to one Sr(2), one Sr(3), one Sr(4), and one U(2) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(15)Sr3U tetrahedra,  a cornercorner with one O(2)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(6)Sr3U tetrahedra,  a cornercorner with one O(12)SrU3 tetrahedra, corners with two equivalent O(16)Sr3U tetrahedra, corners with two equivalent O(18)Sr3U tetrahedra, corners with two equivalent O(3)Sr3U tetrahedra, corners with two equivalent O(19)SrU3 tetrahedra,  a cornercorner with one O(11)SrU3 trigonal pyramid,  an edgeedge with one O(17)Sr3U tetrahedra,  an edgeedge with one O(4)Sr3U tetrahedra,  an edgeedge with one O(6)Sr3U tetrahedra,  an edgeedge with one O(1)SrU3 tetrahedra,  an edgeedge with one O(10)SrU3 tetrahedra, and  an edgeedge with one O(7)SrU3 tetrahedra. In the fifteenth O site, O(15) is bonded to one Sr(1), one Sr(3), one Sr(5), and one U(1) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(14)Sr3U tetrahedra,  a cornercorner with one O(18)Sr3U tetrahedra,  a cornercorner with one O(3)Sr3U tetrahedra,  a cornercorner with one O(6)Sr3U tetrahedra,  a cornercorner with one O(12)SrU3 tetrahedra,  a cornercorner with one O(19)SrU3 tetrahedra, corners with two equivalent O(16)Sr3U tetrahedra, corners with two equivalent O(2)Sr3U tetrahedra, corners with two equivalent O(4)Sr3U tetrahedra,  a cornercorner with one O(11)SrU3 trigonal pyramid,  an edgeedge with one O(17)Sr3U tetrahedra,  an edgeedge with one O(18)Sr3U tetrahedra,  an edgeedge with one O(5)Sr3U tetrahedra,  an edgeedge with one O(10)SrU3 tetrahedra, and  an edgeedge with one O(9)SrU3 tetrahedra. In the sixteenth O site, O(16) is bonded to one Sr(3), one Sr(4), one Sr(5), and one U(5) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(17)Sr3U tetrahedra,  a cornercorner with one O(2)Sr3U tetrahedra,  a cornercorner with one O(3)Sr3U tetrahedra,  a cornercorner with one O(4)Sr3U tetrahedra,  a cornercorner with one O(19)SrU3 tetrahedra, corners with two equivalent O(14)Sr3U tetrahedra, corners with two equivalent O(15)Sr3U tetrahedra, corners with two equivalent O(5)Sr3U tetrahedra, corners with two equivalent O(12)SrU3 tetrahedra,  a cornercorner with one O(11)SrU3 trigonal pyramid,  an edgeedge with one O(17)Sr3U tetrahedra,  an edgeedge with one O(18)Sr3U tetrahedra,  an edgeedge with one O(6)Sr3U tetrahedra,  an edgeedge with one O(10)SrU3 tetrahedra, and  an edgeedge with one O(7)SrU3 tetrahedra. In the seventeenth O site, O(17) is bonded to one Sr(3), one Sr(4), one Sr(5), and one U(3) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(16)Sr3U tetrahedra,  a cornercorner with one O(2)Sr3U tetrahedra,  a cornercorner with one O(4)Sr3U tetrahedra,  a cornercorner with one O(5)Sr3U tetrahedra,  a cornercorner with one O(1)SrU3 tetrahedra,  a cornercorner with one O(10)SrU3 tetrahedra,  a cornercorner with one O(9)SrU3 tetrahedra, corners with two equivalent O(18)Sr3U tetrahedra, corners with two equivalent O(3)Sr3U tetrahedra, corners with two equivalent O(6)Sr3U tetrahedra, corners with two equivalent O(7)SrU3 tetrahedra,  an edgeedge with one O(14)Sr3U tetrahedra,  an edgeedge with one O(15)Sr3U tetrahedra,  an edgeedge with one O(16)Sr3U tetrahedra,  an edgeedge with one O(12)SrU3 tetrahedra, and  an edgeedge with one O(19)SrU3 tetrahedra. In the eighteenth O site, O(18) is bonded to one Sr(1), one Sr(3), one Sr(5), and one U(2) atom to form distorted OSr3U tetrahedra that share  a cornercorner with one O(15)Sr3U tetrahedra,  a cornercorner with one O(3)Sr3U tetrahedra,  a cornercorner with one O(4)Sr3U tetrahedra,  a cornercorner with one O(6)Sr3U tetrahedra,  a cornercorner with one O(1)SrU3 tetrahedra,  a cornercorner with one O(7)SrU3 tetrahedra,  a cornercorner with one O(9)SrU3 tetrahedra, corners with two equivalent O(14)Sr3U tetrahedra, corners with two equivalent O(17)Sr3U tetrahedra, corners with two equivalent O(5)Sr3U tetrahedra, corners with two equivalent O(10)SrU3 tetrahedra,  an edgeedge with one O(15)Sr3U tetrahedra,  an edgeedge with one O(16)Sr3U tetrahedra,  an edgeedge with one O(2)Sr3U tetrahedra,  an edgeedge with one O(12)SrU3 tetrahedra, and  an edgeedge with one O(19)SrU3 tetrahedra. In the nineteenth O site, O(19) is bonded to one Sr(3), one U(2), one U(3), and one U(4) atom to form OSrU3 tetrahedra that share  a cornercorner with one O(15)Sr3U tetrahedra,  a cornercorner with one O(16)Sr3U tetrahedra,  a cornercorner with one O(2)Sr3U tetrahedra,  a cornercorner with one O(3)Sr3U tetrahedra,  a cornercorner with one O(1)SrU3 tetrahedra, corners with two equivalent O(14)Sr3U tetrahedra, corners with two equivalent O(10)SrU3 tetrahedra, corners with two equivalent O(12)SrU3 tetrahedra,  a cornercorner with one O(11)SrU3 trigonal pyramid,  an edgeedge with one O(17)Sr3U tetrahedra,  an edgeedge with one O(18)Sr3U tetrahedra,  an edgeedge with one O(6)Sr3U tetrahedra,  an edgeedge with one O(1)SrU3 tetrahedra,  an edgeedge with one O(7)SrU3 tetrahedra, and  an edgeedge with one O(9)SrU3 tetrahedra.