The material described by Na4UC3O11 crystallizes in the monoclinic Cc space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(8) atoms to form distorted face-sharing NaO6 pentagonal pyramids. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(2), one O(5), one O(6), and one O(8) atom. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(2), one O(3), one O(5), and one O(9) atom. In the fourth Na site, Na(4) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(4), one O(7), and two equivalent O(1) atoms. U(1) is bonded in a distorted hexagonal bipyramidal geometry to one O(1), one O(10), one O(11), one O(2), one O(5), one O(6), one O(7), and one O(9) atom. There are three inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(6) atom. In the second C site, C(2) is bonded in a trigonal planar geometry to one O(2), one O(4), and one O(9) atom. In the third C site, C(3) is bonded in a trigonal planar geometry to one O(5), one O(7), and one O(8) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Na(4), one U(1), and one C(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one U(1), and one C(2) atom. In the third O site, O(3) is bonded to one Na(3), two equivalent Na(1), and one C(1) atom to form distorted corner-sharing ONa3C tetrahedra. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Na(4), two equivalent Na(1), and one C(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one U(1), and one C(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(2), one U(1), and one C(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(4), one U(1), and one C(3) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Na(2), two equivalent Na(1), and one C(3) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(3), one U(1), and one C(2) atom. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one Na(3), one Na(4), and one U(1) atom. In the eleventh O site, O(11) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one Na(3), one Na(4), and one U(1) atom. is represented by the CIF card [CIF]
data_Na4UC3O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.364
_cell_length_b   9.193
_cell_length_c   9.192
_cell_angle_alpha   59.996
_cell_angle_beta   88.841
_cell_angle_gamma   87.681
_symmetry_Int_Tables_number   1
_cell_volume   465.316
_cell_formula_units_Z   2
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
  Na  Na0  1  0.576  0.568  0.991  1.0
  Na  Na1  1  0.076  0.559  0.009  1.0
  Na  Na2  1  0.367  1.000  0.695  1.0
  Na  Na3  1  0.867  0.694  0.305  1.0
  Na  Na4  1  0.285  0.433  0.438  1.0
  Na  Na5  1  0.785  0.870  0.562  1.0
  Na  Na6  1  0.283  0.256  0.873  1.0
  Na  Na7  1  0.783  0.129  0.127  1.0
  U  U8  1  0.821  0.231  0.668  1.0
  U  U9  1  0.321  0.899  0.332  1.0
  C  C10  1  0.358  0.237  0.254  1.0
  C  C11  1  0.858  0.491  0.746  1.0
  C  C12  1  0.339  0.636  0.672  1.0
  C  C13  1  0.839  0.308  0.328  1.0
  C  C14  1  0.284  0.820  0.071  1.0
  C  C15  1  0.784  0.891  0.929  1.0
  O  O16  1  0.386  0.189  0.142  1.0
  O  O17  1  0.886  0.331  0.858  1.0
  O  O18  1  0.379  0.792  0.624  1.0
  O  O19  1  0.879  0.416  0.376  1.0
  O  O20  1  0.354  0.389  0.215  1.0
  O  O21  1  0.854  0.604  0.785  1.0
  O  O22  1  0.344  0.522  0.823  1.0
  O  O23  1  0.844  0.345  0.177  1.0
  O  O24  1  0.248  0.712  0.229  1.0
  O  O25  1  0.748  0.941  0.771  1.0
  O  O26  1  0.333  0.114  0.406  1.0
  O  O27  1  0.833  0.520  0.594  1.0
  O  O28  1  0.320  0.970  0.043  1.0
  O  O29  1  0.820  0.013  0.957  1.0
  O  O30  1  0.287  0.781  0.958  1.0
  O  O31  1  0.787  0.739  0.042  1.0
  O  O32  1  0.292  0.612  0.549  1.0
  O  O33  1  0.792  0.161  0.451  1.0
  O  O34  1  0.109  0.198  0.672  1.0
  O  O35  1  0.609  0.870  0.328  1.0
  O  O36  1  0.533  0.262  0.666  1.0
  O  O37  1  0.033  0.928  0.334  1.0
[/CIF]
.
The material described by Na4UC3O11 crystallizes in the monoclinic Cc space group. There are four inequivalent Na sites. In the first Na site, Na(1) is bonded to two equivalent O(3), two equivalent O(4), and two equivalent O(8) atoms to form distorted face-sharing NaO6 pentagonal pyramids. In the second Na site, Na(2) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(2), one O(5), one O(6), and one O(8) atom. In the third Na site, Na(3) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(2), one O(3), one O(5), and one O(9) atom. In the fourth Na site, Na(4) is bonded in a 6-coordinate geometry to one O(10), one O(11), one O(4), one O(7), and two equivalent O(1) atoms. U(1) is bonded in a distorted hexagonal bipyramidal geometry to one O(1), one O(10), one O(11), one O(2), one O(5), one O(6), one O(7), and one O(9) atom. There are three inequivalent C sites. In the first C site, C(1) is bonded in a trigonal planar geometry to one O(1), one O(3), and one O(6) atom. In the second C site, C(2) is bonded in a trigonal planar geometry to one O(2), one O(4), and one O(9) atom. In the third C site, C(3) is bonded in a trigonal planar geometry to one O(5), one O(7), and one O(8) atom. There are eleven inequivalent O sites. In the first O site, O(1) is bonded in a 4-coordinate geometry to two equivalent Na(4), one U(1), and one C(1) atom. In the second O site, O(2) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one U(1), and one C(2) atom. In the third O site, O(3) is bonded to one Na(3), two equivalent Na(1), and one C(1) atom to form distorted corner-sharing ONa3C tetrahedra. In the fourth O site, O(4) is bonded in a 4-coordinate geometry to one Na(4), two equivalent Na(1), and one C(2) atom. In the fifth O site, O(5) is bonded in a 4-coordinate geometry to one Na(2), one Na(3), one U(1), and one C(3) atom. In the sixth O site, O(6) is bonded in a 3-coordinate geometry to one Na(2), one U(1), and one C(1) atom. In the seventh O site, O(7) is bonded in a 3-coordinate geometry to one Na(4), one U(1), and one C(3) atom. In the eighth O site, O(8) is bonded in a 4-coordinate geometry to one Na(2), two equivalent Na(1), and one C(3) atom. In the ninth O site, O(9) is bonded in a 3-coordinate geometry to one Na(3), one U(1), and one C(2) atom. In the tenth O site, O(10) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one Na(3), one Na(4), and one U(1) atom. In the eleventh O site, O(11) is bonded in a distorted rectangular see-saw-like geometry to one Na(2), one Na(3), one Na(4), and one U(1) atom. is represented by the CIF card [CIF]
data_Na4UC3O11
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.364
_cell_length_b   9.193
_cell_length_c   9.192
_cell_angle_alpha   59.996
_cell_angle_beta   88.841
_cell_angle_gamma   87.681
_symmetry_Int_Tables_number   1
_cell_volume   465.316
_cell_formula_units_Z   2
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
  Na  Na0  1  0.576  0.568  0.991  1.0
  Na  Na1  1  0.076  0.559  0.009  1.0
  Na  Na2  1  0.367  1.000  0.695  1.0
  Na  Na3  1  0.867  0.694  0.305  1.0
  Na  Na4  1  0.285  0.433  0.438  1.0
  Na  Na5  1  0.785  0.870  0.562  1.0
  Na  Na6  1  0.283  0.256  0.873  1.0
  Na  Na7  1  0.783  0.129  0.127  1.0
  U  U8  1  0.821  0.231  0.668  1.0
  U  U9  1  0.321  0.899  0.332  1.0
  C  C10  1  0.358  0.237  0.254  1.0
  C  C11  1  0.858  0.491  0.746  1.0
  C  C12  1  0.339  0.636  0.672  1.0
  C  C13  1  0.839  0.308  0.328  1.0
  C  C14  1  0.284  0.820  0.071  1.0
  C  C15  1  0.784  0.891  0.929  1.0
  O  O16  1  0.386  0.189  0.142  1.0
  O  O17  1  0.886  0.331  0.858  1.0
  O  O18  1  0.379  0.792  0.624  1.0
  O  O19  1  0.879  0.416  0.376  1.0
  O  O20  1  0.354  0.389  0.215  1.0
  O  O21  1  0.854  0.604  0.785  1.0
  O  O22  1  0.344  0.522  0.823  1.0
  O  O23  1  0.844  0.345  0.177  1.0
  O  O24  1  0.248  0.712  0.229  1.0
  O  O25  1  0.748  0.941  0.771  1.0
  O  O26  1  0.333  0.114  0.406  1.0
  O  O27  1  0.833  0.520  0.594  1.0
  O  O28  1  0.320  0.970  0.043  1.0
  O  O29  1  0.820  0.013  0.957  1.0
  O  O30  1  0.287  0.781  0.958  1.0
  O  O31  1  0.787  0.739  0.042  1.0
  O  O32  1  0.292  0.612  0.549  1.0
  O  O33  1  0.792  0.161  0.451  1.0
  O  O34  1  0.109  0.198  0.672  1.0
  O  O35  1  0.609  0.870  0.328  1.0
  O  O36  1  0.533  0.262  0.666  1.0
  O  O37  1  0.033  0.928  0.334  1.0
[/CIF]
.