The material described by U4Y10O27 crystallizes in the triclinic P1 space group. There are four inequivalent U sites. In the first U site, U(1) is bonded in a 7-coordinate geometry to one O(22), one O(23), one O(25), one O(3), one O(5), one O(6), and one O(9) atom. In the second U site, U(2) is bonded in a body-centered cubic geometry to one O(1), one O(11), one O(13), one O(16), one O(18), one O(2), one O(26), and one O(27) atom. In the third U site, U(3) is bonded in a body-centered cubic geometry to one O(11), one O(13), one O(19), one O(2), one O(21), one O(26), one O(7), and one O(8) atom. In the fourth U site, U(4) is bonded in a body-centered cubic geometry to one O(10), one O(14), one O(17), one O(20), one O(22), one O(25), one O(6), and one O(9) atom. There are ten inequivalent Y sites. In the first Y site, Y(1) is bonded in a body-centered cubic geometry to one O(1), one O(10), one O(2), one O(20), one O(25), one O(4), one O(7), and one O(9) atom. In the second Y site, Y(2) is bonded in a body-centered cubic geometry to one O(1), one O(10), one O(11), one O(14), one O(16), one O(18), one O(4), and one O(7) atom. In the third Y site, Y(3) is bonded in a distorted body-centered cubic geometry to one O(12), one O(13), one O(15), one O(24), one O(27), one O(3), one O(5), and one O(8) atom. In the fourth Y site, Y(4) is bonded in a body-centered cubic geometry to one O(12), one O(14), one O(17), one O(23), one O(4), one O(5), one O(6), and one O(9) atom. In the fifth Y site, Y(5) is bonded to one O(12), one O(15), one O(19), one O(22), one O(3), one O(6), and one O(8) atom to form a mixture of distorted corner and edge-sharing YO7 pentagonal bipyramids. In the sixth Y site, Y(6) is bonded in a body-centered cubic geometry to one O(10), one O(16), one O(18), one O(2), one O(20), one O(21), one O(26), and one O(7) atom. In the seventh Y site, Y(7) is bonded in a 7-coordinate geometry to one O(12), one O(15), one O(17), one O(22), one O(23), one O(24), and one O(5) atom. In the eighth Y site, Y(8) is bonded in a body-centered cubic geometry to one O(1), one O(14), one O(16), one O(17), one O(20), one O(23), one O(25), and one O(4) atom. In the ninth Y site, Y(9) is bonded in a body-centered cubic geometry to one O(11), one O(13), one O(15), one O(18), one O(19), one O(21), one O(24), and one O(27) atom. In the tenth Y site, Y(10) is bonded to one O(19), one O(21), one O(24), one O(26), one O(27), one O(3), and one O(8) atom to form a mixture of distorted corner and edge-sharing YO7 hexagonal pyramids. There are twenty-seven inequivalent O sites. In the first O site, O(1) is bonded to one U(2), one Y(1), one Y(2), and one Y(8) atom to form OY3U tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(26)Y2U2 tetrahedra,  a cornercorner with one O(9)Y2U2 tetrahedra,  a cornercorner with one O(16)Y3U tetrahedra,  a cornercorner with one O(17)Y3U tetrahedra,  a cornercorner with one O(27)Y3U tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(14)Y3U tetrahedra, corners with two equivalent O(18)Y3U tetrahedra, corners with two equivalent O(20)Y3U tetrahedra, corners with two equivalent O(7)Y3U tetrahedra,  an edgeedge with one O(11)Y2U2 tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(25)Y2U2 tetrahedra,  an edgeedge with one O(10)Y3U tetrahedra,  an edgeedge with one O(16)Y3U tetrahedra, and  an edgeedge with one O(4)Y4 tetrahedra. In the second O site, O(2) is bonded to one U(2), one U(3), one Y(1), and one Y(6) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(25)Y2U2 tetrahedra,  a cornercorner with one O(26)Y2U2 tetrahedra,  a cornercorner with one O(9)Y2U2 tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(27)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(11)Y2U2 tetrahedra, corners with two equivalent O(10)Y3U tetrahedra, corners with two equivalent O(16)Y3U tetrahedra, corners with two equivalent O(21)Y3U tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(26)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(18)Y3U tetrahedra,  an edgeedge with one O(20)Y3U tetrahedra, and  an edgeedge with one O(7)Y3U tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one U(1), one Y(10), one Y(3), and one Y(5) atom. In the fourth O site, O(4) is bonded to one Y(1), one Y(2), one Y(4), and one Y(8) atom to form OY4 tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(5)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra, corners with two equivalent O(25)Y2U2 tetrahedra, corners with two equivalent O(10)Y3U tetrahedra, corners with two equivalent O(16)Y3U tetrahedra, corners with two equivalent O(17)Y3U tetrahedra,  an edgeedge with one O(9)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(14)Y3U tetrahedra,  an edgeedge with one O(20)Y3U tetrahedra, and  an edgeedge with one O(7)Y3U tetrahedra. In the fifth O site, O(5) is bonded to one U(1), one Y(3), one Y(4), and one Y(7) atom to form OY3U tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(25)Y2U2 tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(27)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(6)Y2U2 tetrahedra, corners with two equivalent O(17)Y3U tetrahedra, corners with two equivalent O(15)Y4 tetrahedra,  an edgeedge with one O(22)Y2U2 tetrahedra,  an edgeedge with one O(9)Y2U2 tetrahedra,  an edgeedge with one O(12)Y4 tetrahedra, and  an edgeedge with one O(24)Y4 tetrahedra. In the sixth O site, O(6) is bonded to one U(1), one U(4), one Y(4), and one Y(5) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(22)Y2U2 tetrahedra,  a cornercorner with one O(9)Y2U2 tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(20)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(15)Y4 tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(25)Y2U2 tetrahedra, corners with two equivalent O(17)Y3U tetrahedra, corners with two equivalent O(5)Y3U tetrahedra,  an edgeedge with one O(22)Y2U2 tetrahedra,  an edgeedge with one O(9)Y2U2 tetrahedra,  an edgeedge with one O(14)Y3U tetrahedra, and  an edgeedge with one O(12)Y4 tetrahedra. In the seventh O site, O(7) is bonded to one U(3), one Y(1), one Y(2), and one Y(6) atom to form OY3U tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(25)Y2U2 tetrahedra,  a cornercorner with one O(9)Y2U2 tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra, corners with two equivalent O(26)Y2U2 tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(18)Y3U tetrahedra, corners with two equivalent O(20)Y3U tetrahedra,  an edgeedge with one O(11)Y2U2 tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(10)Y3U tetrahedra,  an edgeedge with one O(16)Y3U tetrahedra,  an edgeedge with one O(21)Y3U tetrahedra, and  an edgeedge with one O(4)Y4 tetrahedra. In the eighth O site, O(8) is bonded to one U(3), one Y(10), one Y(3), and one Y(5) atom to form OY3U tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(22)Y2U2 tetrahedra,  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(5)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra, corners with two equivalent O(21)Y3U tetrahedra, corners with two equivalent O(27)Y3U tetrahedra, corners with two equivalent O(15)Y4 tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(26)Y2U2 tetrahedra,  an edgeedge with one O(19)Y3U tetrahedra,  an edgeedge with one O(12)Y4 tetrahedra, and  an edgeedge with one O(24)Y4 tetrahedra. In the ninth O site, O(9) is bonded to one U(1), one U(4), one Y(1), and one Y(4) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(25)Y2U2 tetrahedra,  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra, corners with two equivalent O(22)Y2U2 tetrahedra, corners with two equivalent O(14)Y3U tetrahedra, corners with two equivalent O(20)Y3U tetrahedra,  an edgeedge with one O(25)Y2U2 tetrahedra,  an edgeedge with one O(6)Y2U2 tetrahedra,  an edgeedge with one O(10)Y3U tetrahedra,  an edgeedge with one O(17)Y3U tetrahedra,  an edgeedge with one O(5)Y3U tetrahedra, and  an edgeedge with one O(4)Y4 tetrahedra. In the tenth O site, O(10) is bonded to one U(4), one Y(1), one Y(2), and one Y(6) atom to form OY3U tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(22)Y2U2 tetrahedra,  a cornercorner with one O(26)Y2U2 tetrahedra,  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(17)Y3U tetrahedra,  a cornercorner with one O(20)Y3U tetrahedra,  a cornercorner with one O(21)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(25)Y2U2 tetrahedra, corners with two equivalent O(16)Y3U tetrahedra, corners with two equivalent O(4)Y4 tetrahedra,  an edgeedge with one O(9)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(14)Y3U tetrahedra,  an edgeedge with one O(18)Y3U tetrahedra,  an edgeedge with one O(20)Y3U tetrahedra, and  an edgeedge with one O(7)Y3U tetrahedra. In the eleventh O site, O(11) is bonded to one U(2), one U(3), one Y(2), and one Y(9) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(15)Y4 tetrahedra,  a cornercorner with one O(24)Y4 tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(16)Y3U tetrahedra, corners with two equivalent O(21)Y3U tetrahedra, corners with two equivalent O(27)Y3U tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(26)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(18)Y3U tetrahedra,  an edgeedge with one O(19)Y3U tetrahedra, and  an edgeedge with one O(7)Y3U tetrahedra. In the twelfth O site, O(12) is bonded to one Y(3), one Y(4), one Y(5), and one Y(7) atom to form OY4 tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(9)Y2U2 tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(27)Y3U tetrahedra,  a cornercorner with one O(5)Y3U tetrahedra,  a cornercorner with one O(15)Y4 tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(22)Y2U2 tetrahedra, corners with two equivalent O(24)Y4 tetrahedra,  an edgeedge with one O(6)Y2U2 tetrahedra,  an edgeedge with one O(17)Y3U tetrahedra,  an edgeedge with one O(5)Y3U tetrahedra,  an edgeedge with one O(8)Y3U tetrahedra, and  an edgeedge with one O(15)Y4 tetrahedra. In the thirteenth O site, O(13) is bonded to one U(2), one U(3), one Y(3), and one Y(9) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(16)Y3U tetrahedra,  a cornercorner with one O(27)Y3U tetrahedra,  a cornercorner with one O(5)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra, corners with two equivalent O(26)Y2U2 tetrahedra, corners with two equivalent O(18)Y3U tetrahedra, corners with two equivalent O(19)Y3U tetrahedra, corners with two equivalent O(24)Y4 tetrahedra,  an edgeedge with one O(11)Y2U2 tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(21)Y3U tetrahedra,  an edgeedge with one O(27)Y3U tetrahedra,  an edgeedge with one O(8)Y3U tetrahedra, and  an edgeedge with one O(15)Y4 tetrahedra. In the fourteenth O site, O(14) is bonded to one U(4), one Y(2), one Y(4), and one Y(8) atom to form OY3U tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(22)Y2U2 tetrahedra,  a cornercorner with one O(17)Y3U tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(5)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(9)Y2U2 tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(20)Y3U tetrahedra,  an edgeedge with one O(25)Y2U2 tetrahedra,  an edgeedge with one O(6)Y2U2 tetrahedra,  an edgeedge with one O(10)Y3U tetrahedra,  an edgeedge with one O(16)Y3U tetrahedra,  an edgeedge with one O(17)Y3U tetrahedra, and  an edgeedge with one O(4)Y4 tetrahedra. In the fifteenth O site, O(15) is bonded to one Y(3), one Y(5), one Y(7), and one Y(9) atom to form OY4 tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(17)Y3U tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(21)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra,  a cornercorner with one O(24)Y4 tetrahedra, corners with two equivalent O(27)Y3U tetrahedra, corners with two equivalent O(5)Y3U tetrahedra, corners with two equivalent O(8)Y3U tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(22)Y2U2 tetrahedra,  an edgeedge with one O(19)Y3U tetrahedra,  an edgeedge with one O(12)Y4 tetrahedra, and  an edgeedge with one O(24)Y4 tetrahedra. In the sixteenth O site, O(16) is bonded to one U(2), one Y(2), one Y(6), and one Y(8) atom to form OY3U tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(25)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(17)Y3U tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(21)Y3U tetrahedra,  a cornercorner with one O(27)Y3U tetrahedra, corners with two equivalent O(11)Y2U2 tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(10)Y3U tetrahedra, corners with two equivalent O(4)Y4 tetrahedra,  an edgeedge with one O(26)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(14)Y3U tetrahedra,  an edgeedge with one O(18)Y3U tetrahedra,  an edgeedge with one O(20)Y3U tetrahedra, and  an edgeedge with one O(7)Y3U tetrahedra. In the seventeenth O site, O(17) is bonded to one U(4), one Y(4), one Y(7), and one Y(8) atom to form OY3U tetrahedra that share  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(16)Y3U tetrahedra,  a cornercorner with one O(15)Y4 tetrahedra,  a cornercorner with one O(24)Y4 tetrahedra, corners with two equivalent O(25)Y2U2 tetrahedra, corners with two equivalent O(6)Y2U2 tetrahedra, corners with two equivalent O(5)Y3U tetrahedra, corners with two equivalent O(4)Y4 tetrahedra,  an edgeedge with one O(22)Y2U2 tetrahedra,  an edgeedge with one O(9)Y2U2 tetrahedra,  an edgeedge with one O(14)Y3U tetrahedra,  an edgeedge with one O(20)Y3U tetrahedra, and  an edgeedge with one O(12)Y4 tetrahedra. In the eighteenth O site, O(18) is bonded to one U(2), one Y(2), one Y(6), and one Y(9) atom to form OY3U tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(16)Y3U tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(20)Y3U tetrahedra,  a cornercorner with one O(15)Y4 tetrahedra,  a cornercorner with one O(24)Y4 tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(26)Y2U2 tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(7)Y3U tetrahedra,  an edgeedge with one O(11)Y2U2 tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(10)Y3U tetrahedra,  an edgeedge with one O(16)Y3U tetrahedra,  an edgeedge with one O(21)Y3U tetrahedra, and  an edgeedge with one O(27)Y3U tetrahedra. In the nineteenth O site, O(19) is bonded to one U(3), one Y(10), one Y(5), and one Y(9) atom to form OY3U tetrahedra that share  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(22)Y2U2 tetrahedra,  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(21)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(26)Y2U2 tetrahedra, corners with two equivalent O(24)Y4 tetrahedra,  an edgeedge with one O(11)Y2U2 tetrahedra,  an edgeedge with one O(21)Y3U tetrahedra,  an edgeedge with one O(27)Y3U tetrahedra,  an edgeedge with one O(8)Y3U tetrahedra, and  an edgeedge with one O(15)Y4 tetrahedra. In the twentieth O site, O(20) is bonded to one U(4), one Y(1), one Y(6), and one Y(8) atom to form OY3U tetrahedra that share  a cornercorner with one O(22)Y2U2 tetrahedra,  a cornercorner with one O(25)Y2U2 tetrahedra,  a cornercorner with one O(26)Y2U2 tetrahedra,  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(21)Y3U tetrahedra, corners with two equivalent O(9)Y2U2 tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(14)Y3U tetrahedra, corners with two equivalent O(7)Y3U tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(25)Y2U2 tetrahedra,  an edgeedge with one O(10)Y3U tetrahedra,  an edgeedge with one O(16)Y3U tetrahedra,  an edgeedge with one O(17)Y3U tetrahedra, and  an edgeedge with one O(4)Y4 tetrahedra. In the twenty-first O site, O(21) is bonded to one U(3), one Y(10), one Y(6), and one Y(9) atom to form OY3U tetrahedra that share  a cornercorner with one O(26)Y2U2 tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(16)Y3U tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(20)Y3U tetrahedra,  a cornercorner with one O(15)Y4 tetrahedra, corners with two equivalent O(11)Y2U2 tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(27)Y3U tetrahedra, corners with two equivalent O(8)Y3U tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(26)Y2U2 tetrahedra,  an edgeedge with one O(18)Y3U tetrahedra,  an edgeedge with one O(19)Y3U tetrahedra,  an edgeedge with one O(7)Y3U tetrahedra, and  an edgeedge with one O(24)Y4 tetrahedra. In the twenty-second O site, O(22) is bonded to one U(1), one U(4), one Y(5), and one Y(7) atom to form distorted OY2U2 tetrahedra that share  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(20)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(24)Y4 tetrahedra, corners with two equivalent O(9)Y2U2 tetrahedra, corners with two equivalent O(12)Y4 tetrahedra,  an edgeedge with one O(25)Y2U2 tetrahedra,  an edgeedge with one O(6)Y2U2 tetrahedra,  an edgeedge with one O(17)Y3U tetrahedra,  an edgeedge with one O(5)Y3U tetrahedra, and  an edgeedge with one O(15)Y4 tetrahedra. In the twenty-third O site, O(23) is bonded in a 4-coordinate geometry to one U(1), one Y(4), one Y(7), and one Y(8) atom. In the twenty-fourth O site, O(24) is bonded to one Y(10), one Y(3), one Y(7), and one Y(9) atom to form OY4 tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(22)Y2U2 tetrahedra,  a cornercorner with one O(26)Y2U2 tetrahedra,  a cornercorner with one O(17)Y3U tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(27)Y3U tetrahedra,  a cornercorner with one O(15)Y4 tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(19)Y3U tetrahedra, corners with two equivalent O(12)Y4 tetrahedra,  an edgeedge with one O(21)Y3U tetrahedra,  an edgeedge with one O(27)Y3U tetrahedra,  an edgeedge with one O(5)Y3U tetrahedra,  an edgeedge with one O(8)Y3U tetrahedra, and  an edgeedge with one O(15)Y4 tetrahedra. In the twenty-fifth O site, O(25) is bonded to one U(1), one U(4), one Y(1), and one Y(8) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(9)Y2U2 tetrahedra,  a cornercorner with one O(16)Y3U tetrahedra,  a cornercorner with one O(20)Y3U tetrahedra,  a cornercorner with one O(5)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra, corners with two equivalent O(6)Y2U2 tetrahedra, corners with two equivalent O(10)Y3U tetrahedra, corners with two equivalent O(17)Y3U tetrahedra, corners with two equivalent O(4)Y4 tetrahedra,  an edgeedge with one O(22)Y2U2 tetrahedra,  an edgeedge with one O(9)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(14)Y3U tetrahedra, and  an edgeedge with one O(20)Y3U tetrahedra. In the twenty-sixth O site, O(26) is bonded to one U(2), one U(3), one Y(10), and one Y(6) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(20)Y3U tetrahedra,  a cornercorner with one O(21)Y3U tetrahedra,  a cornercorner with one O(24)Y4 tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(18)Y3U tetrahedra, corners with two equivalent O(19)Y3U tetrahedra, corners with two equivalent O(7)Y3U tetrahedra,  an edgeedge with one O(11)Y2U2 tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(16)Y3U tetrahedra,  an edgeedge with one O(21)Y3U tetrahedra,  an edgeedge with one O(27)Y3U tetrahedra, and  an edgeedge with one O(8)Y3U tetrahedra. In the twenty-seventh O site, O(27) is bonded to one U(2), one Y(10), one Y(3), and one Y(9) atom to form OY3U tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(16)Y3U tetrahedra,  a cornercorner with one O(5)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra,  a cornercorner with one O(24)Y4 tetrahedra, corners with two equivalent O(11)Y2U2 tetrahedra, corners with two equivalent O(21)Y3U tetrahedra, corners with two equivalent O(8)Y3U tetrahedra, corners with two equivalent O(15)Y4 tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(26)Y2U2 tetrahedra,  an edgeedge with one O(18)Y3U tetrahedra,  an edgeedge with one O(19)Y3U tetrahedra, and  an edgeedge with one O(24)Y4 tetrahedra. is represented by the CIF card [CIF]
data_Y10U4O27
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.507
_cell_length_b   6.536
_cell_length_c   13.003
_cell_angle_alpha   99.093
_cell_angle_beta   99.308
_cell_angle_gamma   99.604
_symmetry_Int_Tables_number   1
_cell_volume   528.259
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Y  Y0  1  0.697  0.849  0.211  1.0
  Y  Y1  1  0.140  0.570  0.142  1.0
  Y  Y2  1  0.703  0.857  0.713  1.0
  Y  Y3  1  0.423  0.704  0.430  1.0
  Y  Y4  1  0.147  0.608  0.649  1.0
  Y  Y5  1  0.571  0.287  0.072  1.0
  Y  Y6  1  0.608  0.306  0.577  1.0
  Y  Y7  1  0.286  0.131  0.282  1.0
  Y  Y8  1  0.855  0.425  0.849  1.0
  Y  Y9  1  0.301  0.148  0.800  1.0
  U  U10  1  0.984  0.986  0.491  1.0
  U  U11  1  0.997  0.006  0.001  1.0
  U  U12  1  0.427  0.704  0.928  1.0
  U  U13  1  0.853  0.421  0.349  1.0
  O  O14  1  0.022  0.897  0.144  1.0
  O  O15  1  0.669  0.957  0.044  1.0
  O  O16  1  0.073  0.952  0.649  1.0
  O  O17  1  0.377  0.818  0.273  1.0
  O  O18  1  0.692  0.957  0.542  1.0
  O  O19  1  0.077  0.676  0.475  1.0
  O  O20  1  0.455  0.614  0.079  1.0
  O  O21  1  0.397  0.822  0.783  1.0
  O  O22  1  0.749  0.734  0.371  1.0
  O  O23  1  0.821  0.534  0.202  1.0
  O  O24  1  0.111  0.683  0.973  1.0
  O  O25  1  0.446  0.588  0.589  1.0
  O  O26  1  0.743  0.752  0.884  1.0
  O  O27  1  0.152  0.445  0.311  1.0
  O  O28  1  0.836  0.563  0.696  1.0
  O  O29  1  0.244  0.244  0.124  1.0
  O  O30  1  0.568  0.384  0.407  1.0
  O  O31  1  0.898  0.303  0.017  1.0
  O  O32  1  0.196  0.460  0.800  1.0
  O  O33  1  0.625  0.186  0.235  1.0
  O  O34  1  0.538  0.407  0.915  1.0
  O  O35  1  0.939  0.309  0.522  1.0
  O  O36  1  0.295  0.060  0.473  1.0
  O  O37  1  0.592  0.182  0.724  1.0
  O  O38  1  0.951  0.090  0.341  1.0
  O  O39  1  0.315  0.026  0.954  1.0
  O  O40  1  0.965  0.090  0.848  1.0
[/CIF]
.
The material described by U4Y10O27 crystallizes in the triclinic P1 space group. There are four inequivalent U sites. In the first U site, U(1) is bonded in a 7-coordinate geometry to one O(22), one O(23), one O(25), one O(3), one O(5), one O(6), and one O(9) atom. In the second U site, U(2) is bonded in a body-centered cubic geometry to one O(1), one O(11), one O(13), one O(16), one O(18), one O(2), one O(26), and one O(27) atom. In the third U site, U(3) is bonded in a body-centered cubic geometry to one O(11), one O(13), one O(19), one O(2), one O(21), one O(26), one O(7), and one O(8) atom. In the fourth U site, U(4) is bonded in a body-centered cubic geometry to one O(10), one O(14), one O(17), one O(20), one O(22), one O(25), one O(6), and one O(9) atom. There are ten inequivalent Y sites. In the first Y site, Y(1) is bonded in a body-centered cubic geometry to one O(1), one O(10), one O(2), one O(20), one O(25), one O(4), one O(7), and one O(9) atom. In the second Y site, Y(2) is bonded in a body-centered cubic geometry to one O(1), one O(10), one O(11), one O(14), one O(16), one O(18), one O(4), and one O(7) atom. In the third Y site, Y(3) is bonded in a distorted body-centered cubic geometry to one O(12), one O(13), one O(15), one O(24), one O(27), one O(3), one O(5), and one O(8) atom. In the fourth Y site, Y(4) is bonded in a body-centered cubic geometry to one O(12), one O(14), one O(17), one O(23), one O(4), one O(5), one O(6), and one O(9) atom. In the fifth Y site, Y(5) is bonded to one O(12), one O(15), one O(19), one O(22), one O(3), one O(6), and one O(8) atom to form a mixture of distorted corner and edge-sharing YO7 pentagonal bipyramids. In the sixth Y site, Y(6) is bonded in a body-centered cubic geometry to one O(10), one O(16), one O(18), one O(2), one O(20), one O(21), one O(26), and one O(7) atom. In the seventh Y site, Y(7) is bonded in a 7-coordinate geometry to one O(12), one O(15), one O(17), one O(22), one O(23), one O(24), and one O(5) atom. In the eighth Y site, Y(8) is bonded in a body-centered cubic geometry to one O(1), one O(14), one O(16), one O(17), one O(20), one O(23), one O(25), and one O(4) atom. In the ninth Y site, Y(9) is bonded in a body-centered cubic geometry to one O(11), one O(13), one O(15), one O(18), one O(19), one O(21), one O(24), and one O(27) atom. In the tenth Y site, Y(10) is bonded to one O(19), one O(21), one O(24), one O(26), one O(27), one O(3), and one O(8) atom to form a mixture of distorted corner and edge-sharing YO7 hexagonal pyramids. There are twenty-seven inequivalent O sites. In the first O site, O(1) is bonded to one U(2), one Y(1), one Y(2), and one Y(8) atom to form OY3U tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(26)Y2U2 tetrahedra,  a cornercorner with one O(9)Y2U2 tetrahedra,  a cornercorner with one O(16)Y3U tetrahedra,  a cornercorner with one O(17)Y3U tetrahedra,  a cornercorner with one O(27)Y3U tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(14)Y3U tetrahedra, corners with two equivalent O(18)Y3U tetrahedra, corners with two equivalent O(20)Y3U tetrahedra, corners with two equivalent O(7)Y3U tetrahedra,  an edgeedge with one O(11)Y2U2 tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(25)Y2U2 tetrahedra,  an edgeedge with one O(10)Y3U tetrahedra,  an edgeedge with one O(16)Y3U tetrahedra, and  an edgeedge with one O(4)Y4 tetrahedra. In the second O site, O(2) is bonded to one U(2), one U(3), one Y(1), and one Y(6) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(25)Y2U2 tetrahedra,  a cornercorner with one O(26)Y2U2 tetrahedra,  a cornercorner with one O(9)Y2U2 tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(27)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(11)Y2U2 tetrahedra, corners with two equivalent O(10)Y3U tetrahedra, corners with two equivalent O(16)Y3U tetrahedra, corners with two equivalent O(21)Y3U tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(26)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(18)Y3U tetrahedra,  an edgeedge with one O(20)Y3U tetrahedra, and  an edgeedge with one O(7)Y3U tetrahedra. In the third O site, O(3) is bonded in a 4-coordinate geometry to one U(1), one Y(10), one Y(3), and one Y(5) atom. In the fourth O site, O(4) is bonded to one Y(1), one Y(2), one Y(4), and one Y(8) atom to form OY4 tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(5)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra, corners with two equivalent O(25)Y2U2 tetrahedra, corners with two equivalent O(10)Y3U tetrahedra, corners with two equivalent O(16)Y3U tetrahedra, corners with two equivalent O(17)Y3U tetrahedra,  an edgeedge with one O(9)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(14)Y3U tetrahedra,  an edgeedge with one O(20)Y3U tetrahedra, and  an edgeedge with one O(7)Y3U tetrahedra. In the fifth O site, O(5) is bonded to one U(1), one Y(3), one Y(4), and one Y(7) atom to form OY3U tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(25)Y2U2 tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(27)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(6)Y2U2 tetrahedra, corners with two equivalent O(17)Y3U tetrahedra, corners with two equivalent O(15)Y4 tetrahedra,  an edgeedge with one O(22)Y2U2 tetrahedra,  an edgeedge with one O(9)Y2U2 tetrahedra,  an edgeedge with one O(12)Y4 tetrahedra, and  an edgeedge with one O(24)Y4 tetrahedra. In the sixth O site, O(6) is bonded to one U(1), one U(4), one Y(4), and one Y(5) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(22)Y2U2 tetrahedra,  a cornercorner with one O(9)Y2U2 tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(20)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(15)Y4 tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(25)Y2U2 tetrahedra, corners with two equivalent O(17)Y3U tetrahedra, corners with two equivalent O(5)Y3U tetrahedra,  an edgeedge with one O(22)Y2U2 tetrahedra,  an edgeedge with one O(9)Y2U2 tetrahedra,  an edgeedge with one O(14)Y3U tetrahedra, and  an edgeedge with one O(12)Y4 tetrahedra. In the seventh O site, O(7) is bonded to one U(3), one Y(1), one Y(2), and one Y(6) atom to form OY3U tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(25)Y2U2 tetrahedra,  a cornercorner with one O(9)Y2U2 tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra, corners with two equivalent O(26)Y2U2 tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(18)Y3U tetrahedra, corners with two equivalent O(20)Y3U tetrahedra,  an edgeedge with one O(11)Y2U2 tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(10)Y3U tetrahedra,  an edgeedge with one O(16)Y3U tetrahedra,  an edgeedge with one O(21)Y3U tetrahedra, and  an edgeedge with one O(4)Y4 tetrahedra. In the eighth O site, O(8) is bonded to one U(3), one Y(10), one Y(3), and one Y(5) atom to form OY3U tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(22)Y2U2 tetrahedra,  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(5)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra, corners with two equivalent O(21)Y3U tetrahedra, corners with two equivalent O(27)Y3U tetrahedra, corners with two equivalent O(15)Y4 tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(26)Y2U2 tetrahedra,  an edgeedge with one O(19)Y3U tetrahedra,  an edgeedge with one O(12)Y4 tetrahedra, and  an edgeedge with one O(24)Y4 tetrahedra. In the ninth O site, O(9) is bonded to one U(1), one U(4), one Y(1), and one Y(4) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(25)Y2U2 tetrahedra,  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra, corners with two equivalent O(22)Y2U2 tetrahedra, corners with two equivalent O(14)Y3U tetrahedra, corners with two equivalent O(20)Y3U tetrahedra,  an edgeedge with one O(25)Y2U2 tetrahedra,  an edgeedge with one O(6)Y2U2 tetrahedra,  an edgeedge with one O(10)Y3U tetrahedra,  an edgeedge with one O(17)Y3U tetrahedra,  an edgeedge with one O(5)Y3U tetrahedra, and  an edgeedge with one O(4)Y4 tetrahedra. In the tenth O site, O(10) is bonded to one U(4), one Y(1), one Y(2), and one Y(6) atom to form OY3U tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(22)Y2U2 tetrahedra,  a cornercorner with one O(26)Y2U2 tetrahedra,  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(17)Y3U tetrahedra,  a cornercorner with one O(20)Y3U tetrahedra,  a cornercorner with one O(21)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(25)Y2U2 tetrahedra, corners with two equivalent O(16)Y3U tetrahedra, corners with two equivalent O(4)Y4 tetrahedra,  an edgeedge with one O(9)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(14)Y3U tetrahedra,  an edgeedge with one O(18)Y3U tetrahedra,  an edgeedge with one O(20)Y3U tetrahedra, and  an edgeedge with one O(7)Y3U tetrahedra. In the eleventh O site, O(11) is bonded to one U(2), one U(3), one Y(2), and one Y(9) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(15)Y4 tetrahedra,  a cornercorner with one O(24)Y4 tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(16)Y3U tetrahedra, corners with two equivalent O(21)Y3U tetrahedra, corners with two equivalent O(27)Y3U tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(26)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(18)Y3U tetrahedra,  an edgeedge with one O(19)Y3U tetrahedra, and  an edgeedge with one O(7)Y3U tetrahedra. In the twelfth O site, O(12) is bonded to one Y(3), one Y(4), one Y(5), and one Y(7) atom to form OY4 tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(9)Y2U2 tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(27)Y3U tetrahedra,  a cornercorner with one O(5)Y3U tetrahedra,  a cornercorner with one O(15)Y4 tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(22)Y2U2 tetrahedra, corners with two equivalent O(24)Y4 tetrahedra,  an edgeedge with one O(6)Y2U2 tetrahedra,  an edgeedge with one O(17)Y3U tetrahedra,  an edgeedge with one O(5)Y3U tetrahedra,  an edgeedge with one O(8)Y3U tetrahedra, and  an edgeedge with one O(15)Y4 tetrahedra. In the thirteenth O site, O(13) is bonded to one U(2), one U(3), one Y(3), and one Y(9) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(16)Y3U tetrahedra,  a cornercorner with one O(27)Y3U tetrahedra,  a cornercorner with one O(5)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra, corners with two equivalent O(26)Y2U2 tetrahedra, corners with two equivalent O(18)Y3U tetrahedra, corners with two equivalent O(19)Y3U tetrahedra, corners with two equivalent O(24)Y4 tetrahedra,  an edgeedge with one O(11)Y2U2 tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(21)Y3U tetrahedra,  an edgeedge with one O(27)Y3U tetrahedra,  an edgeedge with one O(8)Y3U tetrahedra, and  an edgeedge with one O(15)Y4 tetrahedra. In the fourteenth O site, O(14) is bonded to one U(4), one Y(2), one Y(4), and one Y(8) atom to form OY3U tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(22)Y2U2 tetrahedra,  a cornercorner with one O(17)Y3U tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(5)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(9)Y2U2 tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(20)Y3U tetrahedra,  an edgeedge with one O(25)Y2U2 tetrahedra,  an edgeedge with one O(6)Y2U2 tetrahedra,  an edgeedge with one O(10)Y3U tetrahedra,  an edgeedge with one O(16)Y3U tetrahedra,  an edgeedge with one O(17)Y3U tetrahedra, and  an edgeedge with one O(4)Y4 tetrahedra. In the fifteenth O site, O(15) is bonded to one Y(3), one Y(5), one Y(7), and one Y(9) atom to form OY4 tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(17)Y3U tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(21)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra,  a cornercorner with one O(24)Y4 tetrahedra, corners with two equivalent O(27)Y3U tetrahedra, corners with two equivalent O(5)Y3U tetrahedra, corners with two equivalent O(8)Y3U tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(22)Y2U2 tetrahedra,  an edgeedge with one O(19)Y3U tetrahedra,  an edgeedge with one O(12)Y4 tetrahedra, and  an edgeedge with one O(24)Y4 tetrahedra. In the sixteenth O site, O(16) is bonded to one U(2), one Y(2), one Y(6), and one Y(8) atom to form OY3U tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(25)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(17)Y3U tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(21)Y3U tetrahedra,  a cornercorner with one O(27)Y3U tetrahedra, corners with two equivalent O(11)Y2U2 tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(10)Y3U tetrahedra, corners with two equivalent O(4)Y4 tetrahedra,  an edgeedge with one O(26)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(14)Y3U tetrahedra,  an edgeedge with one O(18)Y3U tetrahedra,  an edgeedge with one O(20)Y3U tetrahedra, and  an edgeedge with one O(7)Y3U tetrahedra. In the seventeenth O site, O(17) is bonded to one U(4), one Y(4), one Y(7), and one Y(8) atom to form OY3U tetrahedra that share  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(16)Y3U tetrahedra,  a cornercorner with one O(15)Y4 tetrahedra,  a cornercorner with one O(24)Y4 tetrahedra, corners with two equivalent O(25)Y2U2 tetrahedra, corners with two equivalent O(6)Y2U2 tetrahedra, corners with two equivalent O(5)Y3U tetrahedra, corners with two equivalent O(4)Y4 tetrahedra,  an edgeedge with one O(22)Y2U2 tetrahedra,  an edgeedge with one O(9)Y2U2 tetrahedra,  an edgeedge with one O(14)Y3U tetrahedra,  an edgeedge with one O(20)Y3U tetrahedra, and  an edgeedge with one O(12)Y4 tetrahedra. In the eighteenth O site, O(18) is bonded to one U(2), one Y(2), one Y(6), and one Y(9) atom to form OY3U tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(16)Y3U tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(20)Y3U tetrahedra,  a cornercorner with one O(15)Y4 tetrahedra,  a cornercorner with one O(24)Y4 tetrahedra,  a cornercorner with one O(4)Y4 tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(26)Y2U2 tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(7)Y3U tetrahedra,  an edgeedge with one O(11)Y2U2 tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(10)Y3U tetrahedra,  an edgeedge with one O(16)Y3U tetrahedra,  an edgeedge with one O(21)Y3U tetrahedra, and  an edgeedge with one O(27)Y3U tetrahedra. In the nineteenth O site, O(19) is bonded to one U(3), one Y(10), one Y(5), and one Y(9) atom to form OY3U tetrahedra that share  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(22)Y2U2 tetrahedra,  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(21)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(26)Y2U2 tetrahedra, corners with two equivalent O(24)Y4 tetrahedra,  an edgeedge with one O(11)Y2U2 tetrahedra,  an edgeedge with one O(21)Y3U tetrahedra,  an edgeedge with one O(27)Y3U tetrahedra,  an edgeedge with one O(8)Y3U tetrahedra, and  an edgeedge with one O(15)Y4 tetrahedra. In the twentieth O site, O(20) is bonded to one U(4), one Y(1), one Y(6), and one Y(8) atom to form OY3U tetrahedra that share  a cornercorner with one O(22)Y2U2 tetrahedra,  a cornercorner with one O(25)Y2U2 tetrahedra,  a cornercorner with one O(26)Y2U2 tetrahedra,  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(21)Y3U tetrahedra, corners with two equivalent O(9)Y2U2 tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(14)Y3U tetrahedra, corners with two equivalent O(7)Y3U tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(25)Y2U2 tetrahedra,  an edgeedge with one O(10)Y3U tetrahedra,  an edgeedge with one O(16)Y3U tetrahedra,  an edgeedge with one O(17)Y3U tetrahedra, and  an edgeedge with one O(4)Y4 tetrahedra. In the twenty-first O site, O(21) is bonded to one U(3), one Y(10), one Y(6), and one Y(9) atom to form OY3U tetrahedra that share  a cornercorner with one O(26)Y2U2 tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(16)Y3U tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(20)Y3U tetrahedra,  a cornercorner with one O(15)Y4 tetrahedra, corners with two equivalent O(11)Y2U2 tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(27)Y3U tetrahedra, corners with two equivalent O(8)Y3U tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(26)Y2U2 tetrahedra,  an edgeedge with one O(18)Y3U tetrahedra,  an edgeedge with one O(19)Y3U tetrahedra,  an edgeedge with one O(7)Y3U tetrahedra, and  an edgeedge with one O(24)Y4 tetrahedra. In the twenty-second O site, O(22) is bonded to one U(1), one U(4), one Y(5), and one Y(7) atom to form distorted OY2U2 tetrahedra that share  a cornercorner with one O(6)Y2U2 tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(14)Y3U tetrahedra,  a cornercorner with one O(19)Y3U tetrahedra,  a cornercorner with one O(20)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(24)Y4 tetrahedra, corners with two equivalent O(9)Y2U2 tetrahedra, corners with two equivalent O(12)Y4 tetrahedra,  an edgeedge with one O(25)Y2U2 tetrahedra,  an edgeedge with one O(6)Y2U2 tetrahedra,  an edgeedge with one O(17)Y3U tetrahedra,  an edgeedge with one O(5)Y3U tetrahedra, and  an edgeedge with one O(15)Y4 tetrahedra. In the twenty-third O site, O(23) is bonded in a 4-coordinate geometry to one U(1), one Y(4), one Y(7), and one Y(8) atom. In the twenty-fourth O site, O(24) is bonded to one Y(10), one Y(3), one Y(7), and one Y(9) atom to form OY4 tetrahedra that share  a cornercorner with one O(11)Y2U2 tetrahedra,  a cornercorner with one O(22)Y2U2 tetrahedra,  a cornercorner with one O(26)Y2U2 tetrahedra,  a cornercorner with one O(17)Y3U tetrahedra,  a cornercorner with one O(18)Y3U tetrahedra,  a cornercorner with one O(27)Y3U tetrahedra,  a cornercorner with one O(15)Y4 tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(19)Y3U tetrahedra, corners with two equivalent O(12)Y4 tetrahedra,  an edgeedge with one O(21)Y3U tetrahedra,  an edgeedge with one O(27)Y3U tetrahedra,  an edgeedge with one O(5)Y3U tetrahedra,  an edgeedge with one O(8)Y3U tetrahedra, and  an edgeedge with one O(15)Y4 tetrahedra. In the twenty-fifth O site, O(25) is bonded to one U(1), one U(4), one Y(1), and one Y(8) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(9)Y2U2 tetrahedra,  a cornercorner with one O(16)Y3U tetrahedra,  a cornercorner with one O(20)Y3U tetrahedra,  a cornercorner with one O(5)Y3U tetrahedra,  a cornercorner with one O(7)Y3U tetrahedra, corners with two equivalent O(6)Y2U2 tetrahedra, corners with two equivalent O(10)Y3U tetrahedra, corners with two equivalent O(17)Y3U tetrahedra, corners with two equivalent O(4)Y4 tetrahedra,  an edgeedge with one O(22)Y2U2 tetrahedra,  an edgeedge with one O(9)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(14)Y3U tetrahedra, and  an edgeedge with one O(20)Y3U tetrahedra. In the twenty-sixth O site, O(26) is bonded to one U(2), one U(3), one Y(10), and one Y(6) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(10)Y3U tetrahedra,  a cornercorner with one O(20)Y3U tetrahedra,  a cornercorner with one O(21)Y3U tetrahedra,  a cornercorner with one O(24)Y4 tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(18)Y3U tetrahedra, corners with two equivalent O(19)Y3U tetrahedra, corners with two equivalent O(7)Y3U tetrahedra,  an edgeedge with one O(11)Y2U2 tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(16)Y3U tetrahedra,  an edgeedge with one O(21)Y3U tetrahedra,  an edgeedge with one O(27)Y3U tetrahedra, and  an edgeedge with one O(8)Y3U tetrahedra. In the twenty-seventh O site, O(27) is bonded to one U(2), one Y(10), one Y(3), and one Y(9) atom to form OY3U tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(16)Y3U tetrahedra,  a cornercorner with one O(5)Y3U tetrahedra,  a cornercorner with one O(12)Y4 tetrahedra,  a cornercorner with one O(24)Y4 tetrahedra, corners with two equivalent O(11)Y2U2 tetrahedra, corners with two equivalent O(21)Y3U tetrahedra, corners with two equivalent O(8)Y3U tetrahedra, corners with two equivalent O(15)Y4 tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(26)Y2U2 tetrahedra,  an edgeedge with one O(18)Y3U tetrahedra,  an edgeedge with one O(19)Y3U tetrahedra, and  an edgeedge with one O(24)Y4 tetrahedra. is represented by the CIF card [CIF]
data_Y10U4O27
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.507
_cell_length_b   6.536
_cell_length_c   13.003
_cell_angle_alpha   99.093
_cell_angle_beta   99.308
_cell_angle_gamma   99.604
_symmetry_Int_Tables_number   1
_cell_volume   528.259
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
loop_
 _atom_site_type_symbol
 _atom_site_label
 _atom_site_symmetry_multiplicity
 _atom_site_fract_x
 _atom_site_fract_y
 _atom_site_fract_z
 _atom_site_occupancy
  Y  Y0  1  0.697  0.849  0.211  1.0
  Y  Y1  1  0.140  0.570  0.142  1.0
  Y  Y2  1  0.703  0.857  0.713  1.0
  Y  Y3  1  0.423  0.704  0.430  1.0
  Y  Y4  1  0.147  0.608  0.649  1.0
  Y  Y5  1  0.571  0.287  0.072  1.0
  Y  Y6  1  0.608  0.306  0.577  1.0
  Y  Y7  1  0.286  0.131  0.282  1.0
  Y  Y8  1  0.855  0.425  0.849  1.0
  Y  Y9  1  0.301  0.148  0.800  1.0
  U  U10  1  0.984  0.986  0.491  1.0
  U  U11  1  0.997  0.006  0.001  1.0
  U  U12  1  0.427  0.704  0.928  1.0
  U  U13  1  0.853  0.421  0.349  1.0
  O  O14  1  0.022  0.897  0.144  1.0
  O  O15  1  0.669  0.957  0.044  1.0
  O  O16  1  0.073  0.952  0.649  1.0
  O  O17  1  0.377  0.818  0.273  1.0
  O  O18  1  0.692  0.957  0.542  1.0
  O  O19  1  0.077  0.676  0.475  1.0
  O  O20  1  0.455  0.614  0.079  1.0
  O  O21  1  0.397  0.822  0.783  1.0
  O  O22  1  0.749  0.734  0.371  1.0
  O  O23  1  0.821  0.534  0.202  1.0
  O  O24  1  0.111  0.683  0.973  1.0
  O  O25  1  0.446  0.588  0.589  1.0
  O  O26  1  0.743  0.752  0.884  1.0
  O  O27  1  0.152  0.445  0.311  1.0
  O  O28  1  0.836  0.563  0.696  1.0
  O  O29  1  0.244  0.244  0.124  1.0
  O  O30  1  0.568  0.384  0.407  1.0
  O  O31  1  0.898  0.303  0.017  1.0
  O  O32  1  0.196  0.460  0.800  1.0
  O  O33  1  0.625  0.186  0.235  1.0
  O  O34  1  0.538  0.407  0.915  1.0
  O  O35  1  0.939  0.309  0.522  1.0
  O  O36  1  0.295  0.060  0.473  1.0
  O  O37  1  0.592  0.182  0.724  1.0
  O  O38  1  0.951  0.090  0.341  1.0
  O  O39  1  0.315  0.026  0.954  1.0
  O  O40  1  0.965  0.090  0.848  1.0
[/CIF]
.