The structure described by U5Y9O28 is Fluorite-derived structured and crystallizes in the triclinic P-1 space group. There are three inequivalent U sites. In the first U site, U(1) is bonded in a body-centered cubic geometry to one O(1), one O(3), one O(4), one O(5), one O(6), one O(7), and two equivalent O(2) atoms. In the second U site, U(2) is bonded in a body-centered cubic geometry to one O(10), one O(14), one O(5), one O(7), one O(8), one O(9), and two equivalent O(13) atoms. In the third U site, U(3) is bonded in a body-centered cubic geometry to two equivalent O(10), two equivalent O(11), two equivalent O(12), and two equivalent O(14) atoms. There are five inequivalent Y sites. In the first Y site, Y(1) is bonded in a body-centered cubic geometry to one O(2), one O(3), one O(4), one O(6), one O(7), one O(8), and two equivalent O(1) atoms. In the second Y site, Y(2) is bonded in a body-centered cubic geometry to one O(1), one O(12), one O(14), one O(4), one O(6), one O(7), one O(8), and one O(9) atom. In the third Y site, Y(3) is bonded in a body-centered cubic geometry to one O(11), one O(12), one O(13), one O(3), one O(5), one O(8), and two equivalent O(10) atoms. In the fourth Y site, Y(4) is bonded in a body-centered cubic geometry to one O(11), one O(12), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(9) atom. In the fifth Y site, Y(5) is bonded in a body-centered cubic geometry to two equivalent O(11), two equivalent O(13), two equivalent O(14), and two equivalent O(9) atoms. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded to one U(1), one Y(2), and two equivalent Y(1) atoms to form OY3U tetrahedra that share  a cornercorner with one O(14)Y2U2 tetrahedra,  a cornercorner with one O(5)Y2U2 tetrahedra,  a cornercorner with one O(12)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(9)Y3U tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(7)Y2U2 tetrahedra, corners with two equivalent O(4)Y3U tetrahedra, corners with two equivalent O(6)Y3U tetrahedra, corners with three equivalent O(3)Y3U tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(7)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(4)Y3U tetrahedra,  an edgeedge with one O(6)Y3U tetrahedra, and  an edgeedge with one O(8)Y3U tetrahedra. In the second O site, O(2) is bonded to two equivalent U(1), one Y(1), and one Y(4) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(5)Y2U2 tetrahedra,  a cornercorner with one O(11)Y3U tetrahedra,  a cornercorner with one O(12)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(9)Y3U tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(3)Y3U tetrahedra, corners with two equivalent O(4)Y3U tetrahedra, corners with two equivalent O(6)Y3U tetrahedra, corners with three equivalent O(7)Y2U2 tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(5)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(3)Y3U tetrahedra,  an edgeedge with one O(4)Y3U tetrahedra, and  an edgeedge with one O(6)Y3U tetrahedra. In the third O site, O(3) is bonded to one U(1), one Y(1), one Y(3), and one Y(4) atom to form OY3U tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(5)Y2U2 tetrahedra,  a cornercorner with one O(4)Y3U tetrahedra,  a cornercorner with one O(6)Y3U tetrahedra,  a cornercorner with one O(9)Y3U tetrahedra, corners with two equivalent O(10)Y2U2 tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(7)Y2U2 tetrahedra, corners with two equivalent O(12)Y3U tetrahedra, corners with three equivalent O(1)Y3U tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(5)Y2U2 tetrahedra,  an edgeedge with one O(11)Y3U tetrahedra,  an edgeedge with one O(4)Y3U tetrahedra,  an edgeedge with one O(6)Y3U tetrahedra, and  an edgeedge with one O(8)Y3U tetrahedra. In the fourth O site, O(4) is bonded to one U(1), one Y(1), one Y(2), and one Y(4) atom to form OY3U tetrahedra that share  a cornercorner with one O(14)Y2U2 tetrahedra,  a cornercorner with one O(7)Y2U2 tetrahedra,  a cornercorner with one O(11)Y3U tetrahedra,  a cornercorner with one O(3)Y3U tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(5)Y2U2 tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(6)Y3U tetrahedra, corners with two equivalent O(8)Y3U tetrahedra, corners with two equivalent O(9)Y3U tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(7)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(12)Y3U tetrahedra,  an edgeedge with one O(3)Y3U tetrahedra, and  an edgeedge with one O(6)Y3U tetrahedra. In the fifth O site, O(5) is bonded to one U(1), one U(2), one Y(3), and one Y(4) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(14)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(3)Y3U tetrahedra, corners with two equivalent O(11)Y3U tetrahedra, corners with two equivalent O(4)Y3U tetrahedra, corners with two equivalent O(6)Y3U tetrahedra, corners with two equivalent O(8)Y3U tetrahedra, corners with three equivalent O(10)Y2U2 tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(7)Y2U2 tetrahedra,  an edgeedge with one O(12)Y3U tetrahedra,  an edgeedge with one O(3)Y3U tetrahedra, and  an edgeedge with one O(9)Y3U tetrahedra. In the sixth O site, O(6) is bonded to one U(1), one Y(1), one Y(2), and one Y(4) atom to form OY3U tetrahedra that share  a cornercorner with one O(14)Y2U2 tetrahedra,  a cornercorner with one O(7)Y2U2 tetrahedra,  a cornercorner with one O(11)Y3U tetrahedra,  a cornercorner with one O(3)Y3U tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(5)Y2U2 tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(12)Y3U tetrahedra, corners with two equivalent O(4)Y3U tetrahedra, corners with two equivalent O(8)Y3U tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(7)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(3)Y3U tetrahedra,  an edgeedge with one O(4)Y3U tetrahedra, and  an edgeedge with one O(9)Y3U tetrahedra. In the seventh O site, O(7) is bonded to one U(1), one U(2), one Y(1), and one Y(2) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(10)Y2U2 tetrahedra,  a cornercorner with one O(12)Y3U tetrahedra,  a cornercorner with one O(4)Y3U tetrahedra,  a cornercorner with one O(6)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(3)Y3U tetrahedra, corners with two equivalent O(9)Y3U tetrahedra, corners with three equivalent O(2)Y2U2 tetrahedra,  an edgeedge with one O(14)Y2U2 tetrahedra,  an edgeedge with one O(5)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(4)Y3U tetrahedra,  an edgeedge with one O(6)Y3U tetrahedra, and  an edgeedge with one O(8)Y3U tetrahedra. In the eighth O site, O(8) is bonded to one U(2), one Y(1), one Y(2), and one Y(3) atom to form OY3U tetrahedra that share  a cornercorner with one O(10)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(7)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(11)Y3U tetrahedra, corners with two equivalent O(14)Y2U2 tetrahedra, corners with two equivalent O(5)Y2U2 tetrahedra, corners with two equivalent O(4)Y3U tetrahedra, corners with two equivalent O(6)Y3U tetrahedra, corners with three equivalent O(13)Y2U2 tetrahedra,  an edgeedge with one O(10)Y2U2 tetrahedra,  an edgeedge with one O(7)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(12)Y3U tetrahedra,  an edgeedge with one O(3)Y3U tetrahedra, and  an edgeedge with one O(9)Y3U tetrahedra. In the ninth O site, O(9) is bonded to one U(2), one Y(2), one Y(4), and one Y(5) atom to form OY3U tetrahedra that share  a cornercorner with one O(10)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(11)Y3U tetrahedra,  a cornercorner with one O(3)Y3U tetrahedra,  a cornercorner with one O(9)Y3U tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(14)Y2U2 tetrahedra, corners with two equivalent O(7)Y2U2 tetrahedra, corners with two equivalent O(12)Y3U tetrahedra, corners with two equivalent O(4)Y3U tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(14)Y2U2 tetrahedra,  an edgeedge with one O(5)Y2U2 tetrahedra,  an edgeedge with one O(11)Y3U tetrahedra,  an edgeedge with one O(6)Y3U tetrahedra, and  an edgeedge with one O(8)Y3U tetrahedra. In the tenth O site, O(10) is bonded to one U(2), one U(3), and two equivalent Y(3) atoms to form OY2U2 tetrahedra that share  a cornercorner with one O(10)Y2U2 tetrahedra,  a cornercorner with one O(14)Y2U2 tetrahedra,  a cornercorner with one O(7)Y2U2 tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(9)Y3U tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(11)Y3U tetrahedra, corners with two equivalent O(12)Y3U tetrahedra, corners with two equivalent O(3)Y3U tetrahedra, corners with three equivalent O(5)Y2U2 tetrahedra,  an edgeedge with one O(10)Y2U2 tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(14)Y2U2 tetrahedra,  an edgeedge with one O(11)Y3U tetrahedra,  an edgeedge with one O(12)Y3U tetrahedra, and  an edgeedge with one O(8)Y3U tetrahedra. In the eleventh O site, O(11) is bonded to one U(3), one Y(3), one Y(4), and one Y(5) 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(4)Y3U tetrahedra,  a cornercorner with one O(6)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(9)Y3U tetrahedra, corners with two equivalent O(10)Y2U2 tetrahedra, corners with two equivalent O(14)Y2U2 tetrahedra, corners with two equivalent O(5)Y2U2 tetrahedra, corners with two equivalent O(11)Y3U tetrahedra, corners with two equivalent O(12)Y3U tetrahedra,  an edgeedge with one O(10)Y2U2 tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(14)Y2U2 tetrahedra,  an edgeedge with one O(12)Y3U tetrahedra,  an edgeedge with one O(3)Y3U tetrahedra, and  an edgeedge with one O(9)Y3U tetrahedra. In the twelfth O site, O(12) is bonded to one U(3), one Y(2), one Y(3), and one Y(4) atom to form OY3U tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(14)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(7)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(12)Y3U tetrahedra, corners with two equivalent O(10)Y2U2 tetrahedra, corners with two equivalent O(11)Y3U tetrahedra, corners with two equivalent O(3)Y3U tetrahedra, corners with two equivalent O(6)Y3U tetrahedra, corners with two equivalent O(9)Y3U tetrahedra,  an edgeedge with one O(10)Y2U2 tetrahedra,  an edgeedge with one O(14)Y2U2 tetrahedra,  an edgeedge with one O(5)Y2U2 tetrahedra,  an edgeedge with one O(11)Y3U tetrahedra,  an edgeedge with one O(4)Y3U tetrahedra, and  an edgeedge with one O(8)Y3U tetrahedra. In the thirteenth O site, O(13) is bonded to two equivalent U(2), one Y(3), and one Y(5) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(5)Y2U2 tetrahedra,  a cornercorner with one O(11)Y3U tetrahedra,  a cornercorner with one O(12)Y3U tetrahedra,  a cornercorner with one O(3)Y3U tetrahedra, corners with two equivalent O(10)Y2U2 tetrahedra, corners with two equivalent O(14)Y2U2 tetrahedra, corners with two equivalent O(7)Y2U2 tetrahedra, corners with two equivalent O(9)Y3U tetrahedra, corners with three equivalent O(8)Y3U tetrahedra,  an edgeedge with one O(10)Y2U2 tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(14)Y2U2 tetrahedra,  an edgeedge with one O(5)Y2U2 tetrahedra,  an edgeedge with one O(11)Y3U tetrahedra, and  an edgeedge with one O(9)Y3U tetrahedra. In the fourteenth O site, O(14) is bonded to one U(2), one U(3), one Y(2), and one Y(5) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(10)Y2U2 tetrahedra,  a cornercorner with one O(5)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(12)Y3U tetrahedra,  a cornercorner with one O(4)Y3U tetrahedra,  a cornercorner with one O(6)Y3U tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(14)Y2U2 tetrahedra, corners with two equivalent O(11)Y3U tetrahedra, corners with two equivalent O(8)Y3U tetrahedra, corners with two equivalent O(9)Y3U tetrahedra,  an edgeedge with one O(10)Y2U2 tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(7)Y2U2 tetrahedra,  an edgeedge with one O(11)Y3U tetrahedra,  an edgeedge with one O(12)Y3U tetrahedra, and  an edgeedge with one O(9)Y3U tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y9U5O28
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.498
_cell_length_b   7.495
_cell_length_c   11.801
_cell_angle_alpha   72.794
_cell_angle_beta   80.306
_cell_angle_gamma   73.827
_symmetry_Int_Tables_number   1
_cell_volume   524.986
_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  0.782  0.215  0.931  1.0
  Y  Y1  1  0.218  0.785  0.069  1.0
  Y  Y2  1  0.644  0.857  0.214  1.0
  Y  Y3  1  0.069  0.431  0.356  1.0
  Y  Y4  1  0.641  0.357  0.217  1.0
  Y  Y5  1  0.500  0.000  0.500  1.0
  Y  Y6  1  0.931  0.569  0.644  1.0
  Y  Y7  1  0.359  0.643  0.783  1.0
  Y  Y8  1  0.356  0.143  0.786  1.0
  U  U9  1  0.780  0.715  0.931  1.0
  U  U10  1  0.220  0.285  0.069  1.0
  U  U11  1  0.070  0.928  0.355  1.0
  U  U12  1  0.500  0.500  0.500  1.0
  U  U13  1  0.930  0.072  0.645  1.0
  O  O14  1  0.145  0.118  0.972  1.0
  O  O15  1  0.869  0.400  0.038  1.0
  O  O16  1  0.855  0.882  0.028  1.0
  O  O17  1  0.131  0.600  0.962  1.0
  O  O18  1  0.276  0.455  0.171  1.0
  O  O19  1  0.579  0.675  0.101  1.0
  O  O20  1  0.008  0.238  0.245  1.0
  O  O21  1  0.560  0.179  0.107  1.0
  O  O22  1  0.281  0.975  0.179  1.0
  O  O23  1  0.010  0.761  0.250  1.0
  O  O24  1  0.733  0.028  0.328  1.0
  O  O25  1  0.132  0.629  0.459  1.0
  O  O26  1  0.423  0.329  0.403  1.0
  O  O27  1  0.707  0.539  0.333  1.0
  O  O28  1  0.132  0.101  0.459  1.0
  O  O29  1  0.868  0.371  0.541  1.0
  O  O30  1  0.406  0.827  0.388  1.0
  O  O31  1  0.868  0.899  0.541  1.0
  O  O32  1  0.267  0.972  0.672  1.0
  O  O33  1  0.577  0.671  0.597  1.0
  O  O34  1  0.990  0.239  0.750  1.0
  O  O35  1  0.594  0.173  0.612  1.0
  O  O36  1  0.293  0.461  0.667  1.0
  O  O37  1  0.992  0.762  0.755  1.0
  O  O38  1  0.440  0.821  0.893  1.0
  O  O39  1  0.719  0.025  0.821  1.0
  O  O40  1  0.421  0.325  0.899  1.0
  O  O41  1  0.724  0.545  0.829  1.0
[/CIF]
.
The structure described by U5Y9O28 is Fluorite-derived structured and crystallizes in the triclinic P-1 space group. There are three inequivalent U sites. In the first U site, U(1) is bonded in a body-centered cubic geometry to one O(1), one O(3), one O(4), one O(5), one O(6), one O(7), and two equivalent O(2) atoms. In the second U site, U(2) is bonded in a body-centered cubic geometry to one O(10), one O(14), one O(5), one O(7), one O(8), one O(9), and two equivalent O(13) atoms. In the third U site, U(3) is bonded in a body-centered cubic geometry to two equivalent O(10), two equivalent O(11), two equivalent O(12), and two equivalent O(14) atoms. There are five inequivalent Y sites. In the first Y site, Y(1) is bonded in a body-centered cubic geometry to one O(2), one O(3), one O(4), one O(6), one O(7), one O(8), and two equivalent O(1) atoms. In the second Y site, Y(2) is bonded in a body-centered cubic geometry to one O(1), one O(12), one O(14), one O(4), one O(6), one O(7), one O(8), and one O(9) atom. In the third Y site, Y(3) is bonded in a body-centered cubic geometry to one O(11), one O(12), one O(13), one O(3), one O(5), one O(8), and two equivalent O(10) atoms. In the fourth Y site, Y(4) is bonded in a body-centered cubic geometry to one O(11), one O(12), one O(2), one O(3), one O(4), one O(5), one O(6), and one O(9) atom. In the fifth Y site, Y(5) is bonded in a body-centered cubic geometry to two equivalent O(11), two equivalent O(13), two equivalent O(14), and two equivalent O(9) atoms. There are fourteen inequivalent O sites. In the first O site, O(1) is bonded to one U(1), one Y(2), and two equivalent Y(1) atoms to form OY3U tetrahedra that share  a cornercorner with one O(14)Y2U2 tetrahedra,  a cornercorner with one O(5)Y2U2 tetrahedra,  a cornercorner with one O(12)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(9)Y3U tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(7)Y2U2 tetrahedra, corners with two equivalent O(4)Y3U tetrahedra, corners with two equivalent O(6)Y3U tetrahedra, corners with three equivalent O(3)Y3U tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(7)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(4)Y3U tetrahedra,  an edgeedge with one O(6)Y3U tetrahedra, and  an edgeedge with one O(8)Y3U tetrahedra. In the second O site, O(2) is bonded to two equivalent U(1), one Y(1), and one Y(4) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(5)Y2U2 tetrahedra,  a cornercorner with one O(11)Y3U tetrahedra,  a cornercorner with one O(12)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(9)Y3U tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(3)Y3U tetrahedra, corners with two equivalent O(4)Y3U tetrahedra, corners with two equivalent O(6)Y3U tetrahedra, corners with three equivalent O(7)Y2U2 tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(5)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(3)Y3U tetrahedra,  an edgeedge with one O(4)Y3U tetrahedra, and  an edgeedge with one O(6)Y3U tetrahedra. In the third O site, O(3) is bonded to one U(1), one Y(1), one Y(3), and one Y(4) atom to form OY3U tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(5)Y2U2 tetrahedra,  a cornercorner with one O(4)Y3U tetrahedra,  a cornercorner with one O(6)Y3U tetrahedra,  a cornercorner with one O(9)Y3U tetrahedra, corners with two equivalent O(10)Y2U2 tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(7)Y2U2 tetrahedra, corners with two equivalent O(12)Y3U tetrahedra, corners with three equivalent O(1)Y3U tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(5)Y2U2 tetrahedra,  an edgeedge with one O(11)Y3U tetrahedra,  an edgeedge with one O(4)Y3U tetrahedra,  an edgeedge with one O(6)Y3U tetrahedra, and  an edgeedge with one O(8)Y3U tetrahedra. In the fourth O site, O(4) is bonded to one U(1), one Y(1), one Y(2), and one Y(4) atom to form OY3U tetrahedra that share  a cornercorner with one O(14)Y2U2 tetrahedra,  a cornercorner with one O(7)Y2U2 tetrahedra,  a cornercorner with one O(11)Y3U tetrahedra,  a cornercorner with one O(3)Y3U tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(5)Y2U2 tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(6)Y3U tetrahedra, corners with two equivalent O(8)Y3U tetrahedra, corners with two equivalent O(9)Y3U tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(7)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(12)Y3U tetrahedra,  an edgeedge with one O(3)Y3U tetrahedra, and  an edgeedge with one O(6)Y3U tetrahedra. In the fifth O site, O(5) is bonded to one U(1), one U(2), one Y(3), and one Y(4) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(14)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(3)Y3U tetrahedra, corners with two equivalent O(11)Y3U tetrahedra, corners with two equivalent O(4)Y3U tetrahedra, corners with two equivalent O(6)Y3U tetrahedra, corners with two equivalent O(8)Y3U tetrahedra, corners with three equivalent O(10)Y2U2 tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(7)Y2U2 tetrahedra,  an edgeedge with one O(12)Y3U tetrahedra,  an edgeedge with one O(3)Y3U tetrahedra, and  an edgeedge with one O(9)Y3U tetrahedra. In the sixth O site, O(6) is bonded to one U(1), one Y(1), one Y(2), and one Y(4) atom to form OY3U tetrahedra that share  a cornercorner with one O(14)Y2U2 tetrahedra,  a cornercorner with one O(7)Y2U2 tetrahedra,  a cornercorner with one O(11)Y3U tetrahedra,  a cornercorner with one O(3)Y3U tetrahedra, corners with two equivalent O(2)Y2U2 tetrahedra, corners with two equivalent O(5)Y2U2 tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(12)Y3U tetrahedra, corners with two equivalent O(4)Y3U tetrahedra, corners with two equivalent O(8)Y3U tetrahedra,  an edgeedge with one O(2)Y2U2 tetrahedra,  an edgeedge with one O(7)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(3)Y3U tetrahedra,  an edgeedge with one O(4)Y3U tetrahedra, and  an edgeedge with one O(9)Y3U tetrahedra. In the seventh O site, O(7) is bonded to one U(1), one U(2), one Y(1), and one Y(2) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(10)Y2U2 tetrahedra,  a cornercorner with one O(12)Y3U tetrahedra,  a cornercorner with one O(4)Y3U tetrahedra,  a cornercorner with one O(6)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(1)Y3U tetrahedra, corners with two equivalent O(3)Y3U tetrahedra, corners with two equivalent O(9)Y3U tetrahedra, corners with three equivalent O(2)Y2U2 tetrahedra,  an edgeedge with one O(14)Y2U2 tetrahedra,  an edgeedge with one O(5)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(4)Y3U tetrahedra,  an edgeedge with one O(6)Y3U tetrahedra, and  an edgeedge with one O(8)Y3U tetrahedra. In the eighth O site, O(8) is bonded to one U(2), one Y(1), one Y(2), and one Y(3) atom to form OY3U tetrahedra that share  a cornercorner with one O(10)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(7)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(11)Y3U tetrahedra, corners with two equivalent O(14)Y2U2 tetrahedra, corners with two equivalent O(5)Y2U2 tetrahedra, corners with two equivalent O(4)Y3U tetrahedra, corners with two equivalent O(6)Y3U tetrahedra, corners with three equivalent O(13)Y2U2 tetrahedra,  an edgeedge with one O(10)Y2U2 tetrahedra,  an edgeedge with one O(7)Y2U2 tetrahedra,  an edgeedge with one O(1)Y3U tetrahedra,  an edgeedge with one O(12)Y3U tetrahedra,  an edgeedge with one O(3)Y3U tetrahedra, and  an edgeedge with one O(9)Y3U tetrahedra. In the ninth O site, O(9) is bonded to one U(2), one Y(2), one Y(4), and one Y(5) atom to form OY3U tetrahedra that share  a cornercorner with one O(10)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(11)Y3U tetrahedra,  a cornercorner with one O(3)Y3U tetrahedra,  a cornercorner with one O(9)Y3U tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(14)Y2U2 tetrahedra, corners with two equivalent O(7)Y2U2 tetrahedra, corners with two equivalent O(12)Y3U tetrahedra, corners with two equivalent O(4)Y3U tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(14)Y2U2 tetrahedra,  an edgeedge with one O(5)Y2U2 tetrahedra,  an edgeedge with one O(11)Y3U tetrahedra,  an edgeedge with one O(6)Y3U tetrahedra, and  an edgeedge with one O(8)Y3U tetrahedra. In the tenth O site, O(10) is bonded to one U(2), one U(3), and two equivalent Y(3) atoms to form OY2U2 tetrahedra that share  a cornercorner with one O(10)Y2U2 tetrahedra,  a cornercorner with one O(14)Y2U2 tetrahedra,  a cornercorner with one O(7)Y2U2 tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(9)Y3U tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(11)Y3U tetrahedra, corners with two equivalent O(12)Y3U tetrahedra, corners with two equivalent O(3)Y3U tetrahedra, corners with three equivalent O(5)Y2U2 tetrahedra,  an edgeedge with one O(10)Y2U2 tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(14)Y2U2 tetrahedra,  an edgeedge with one O(11)Y3U tetrahedra,  an edgeedge with one O(12)Y3U tetrahedra, and  an edgeedge with one O(8)Y3U tetrahedra. In the eleventh O site, O(11) is bonded to one U(3), one Y(3), one Y(4), and one Y(5) 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(4)Y3U tetrahedra,  a cornercorner with one O(6)Y3U tetrahedra,  a cornercorner with one O(8)Y3U tetrahedra,  a cornercorner with one O(9)Y3U tetrahedra, corners with two equivalent O(10)Y2U2 tetrahedra, corners with two equivalent O(14)Y2U2 tetrahedra, corners with two equivalent O(5)Y2U2 tetrahedra, corners with two equivalent O(11)Y3U tetrahedra, corners with two equivalent O(12)Y3U tetrahedra,  an edgeedge with one O(10)Y2U2 tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(14)Y2U2 tetrahedra,  an edgeedge with one O(12)Y3U tetrahedra,  an edgeedge with one O(3)Y3U tetrahedra, and  an edgeedge with one O(9)Y3U tetrahedra. In the twelfth O site, O(12) is bonded to one U(3), one Y(2), one Y(3), and one Y(4) atom to form OY3U tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(14)Y2U2 tetrahedra,  a cornercorner with one O(2)Y2U2 tetrahedra,  a cornercorner with one O(7)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(12)Y3U tetrahedra, corners with two equivalent O(10)Y2U2 tetrahedra, corners with two equivalent O(11)Y3U tetrahedra, corners with two equivalent O(3)Y3U tetrahedra, corners with two equivalent O(6)Y3U tetrahedra, corners with two equivalent O(9)Y3U tetrahedra,  an edgeedge with one O(10)Y2U2 tetrahedra,  an edgeedge with one O(14)Y2U2 tetrahedra,  an edgeedge with one O(5)Y2U2 tetrahedra,  an edgeedge with one O(11)Y3U tetrahedra,  an edgeedge with one O(4)Y3U tetrahedra, and  an edgeedge with one O(8)Y3U tetrahedra. In the thirteenth O site, O(13) is bonded to two equivalent U(2), one Y(3), and one Y(5) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(13)Y2U2 tetrahedra,  a cornercorner with one O(5)Y2U2 tetrahedra,  a cornercorner with one O(11)Y3U tetrahedra,  a cornercorner with one O(12)Y3U tetrahedra,  a cornercorner with one O(3)Y3U tetrahedra, corners with two equivalent O(10)Y2U2 tetrahedra, corners with two equivalent O(14)Y2U2 tetrahedra, corners with two equivalent O(7)Y2U2 tetrahedra, corners with two equivalent O(9)Y3U tetrahedra, corners with three equivalent O(8)Y3U tetrahedra,  an edgeedge with one O(10)Y2U2 tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(14)Y2U2 tetrahedra,  an edgeedge with one O(5)Y2U2 tetrahedra,  an edgeedge with one O(11)Y3U tetrahedra, and  an edgeedge with one O(9)Y3U tetrahedra. In the fourteenth O site, O(14) is bonded to one U(2), one U(3), one Y(2), and one Y(5) atom to form OY2U2 tetrahedra that share  a cornercorner with one O(10)Y2U2 tetrahedra,  a cornercorner with one O(5)Y2U2 tetrahedra,  a cornercorner with one O(1)Y3U tetrahedra,  a cornercorner with one O(12)Y3U tetrahedra,  a cornercorner with one O(4)Y3U tetrahedra,  a cornercorner with one O(6)Y3U tetrahedra, corners with two equivalent O(13)Y2U2 tetrahedra, corners with two equivalent O(14)Y2U2 tetrahedra, corners with two equivalent O(11)Y3U tetrahedra, corners with two equivalent O(8)Y3U tetrahedra, corners with two equivalent O(9)Y3U tetrahedra,  an edgeedge with one O(10)Y2U2 tetrahedra,  an edgeedge with one O(13)Y2U2 tetrahedra,  an edgeedge with one O(7)Y2U2 tetrahedra,  an edgeedge with one O(11)Y3U tetrahedra,  an edgeedge with one O(12)Y3U tetrahedra, and  an edgeedge with one O(9)Y3U tetrahedra. is represented by the Crystallographic Information File (CIF) [CIF]
data_Y9U5O28
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.498
_cell_length_b   7.495
_cell_length_c   11.801
_cell_angle_alpha   72.794
_cell_angle_beta   80.306
_cell_angle_gamma   73.827
_symmetry_Int_Tables_number   1
_cell_volume   524.986
_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  0.782  0.215  0.931  1.0
  Y  Y1  1  0.218  0.785  0.069  1.0
  Y  Y2  1  0.644  0.857  0.214  1.0
  Y  Y3  1  0.069  0.431  0.356  1.0
  Y  Y4  1  0.641  0.357  0.217  1.0
  Y  Y5  1  0.500  0.000  0.500  1.0
  Y  Y6  1  0.931  0.569  0.644  1.0
  Y  Y7  1  0.359  0.643  0.783  1.0
  Y  Y8  1  0.356  0.143  0.786  1.0
  U  U9  1  0.780  0.715  0.931  1.0
  U  U10  1  0.220  0.285  0.069  1.0
  U  U11  1  0.070  0.928  0.355  1.0
  U  U12  1  0.500  0.500  0.500  1.0
  U  U13  1  0.930  0.072  0.645  1.0
  O  O14  1  0.145  0.118  0.972  1.0
  O  O15  1  0.869  0.400  0.038  1.0
  O  O16  1  0.855  0.882  0.028  1.0
  O  O17  1  0.131  0.600  0.962  1.0
  O  O18  1  0.276  0.455  0.171  1.0
  O  O19  1  0.579  0.675  0.101  1.0
  O  O20  1  0.008  0.238  0.245  1.0
  O  O21  1  0.560  0.179  0.107  1.0
  O  O22  1  0.281  0.975  0.179  1.0
  O  O23  1  0.010  0.761  0.250  1.0
  O  O24  1  0.733  0.028  0.328  1.0
  O  O25  1  0.132  0.629  0.459  1.0
  O  O26  1  0.423  0.329  0.403  1.0
  O  O27  1  0.707  0.539  0.333  1.0
  O  O28  1  0.132  0.101  0.459  1.0
  O  O29  1  0.868  0.371  0.541  1.0
  O  O30  1  0.406  0.827  0.388  1.0
  O  O31  1  0.868  0.899  0.541  1.0
  O  O32  1  0.267  0.972  0.672  1.0
  O  O33  1  0.577  0.671  0.597  1.0
  O  O34  1  0.990  0.239  0.750  1.0
  O  O35  1  0.594  0.173  0.612  1.0
  O  O36  1  0.293  0.461  0.667  1.0
  O  O37  1  0.992  0.762  0.755  1.0
  O  O38  1  0.440  0.821  0.893  1.0
  O  O39  1  0.719  0.025  0.821  1.0
  O  O40  1  0.421  0.325  0.899  1.0
  O  O41  1  0.724  0.545  0.829  1.0
[/CIF]
.