The crystal structure described by Na2UO4 crystallizes in the orthorhombic Pccn space group. Na(1) is bonded in a 5-coordinate geometry to two equivalent O(1) and three equivalent O(2) atoms. U(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form corner-sharing UO6 octahedra. The corner-sharing octahedral tilt angles are 32°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1) and two equivalent U(1) atoms to form a mixture of distorted edge and corner-sharing ONa2U2 trigonal pyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to three equivalent Na(1) and one U(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2UO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.929
_cell_length_b   5.978
_cell_length_c   12.203
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   432.484
_cell_formula_units_Z   4
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  0.527  0.471  0.657  1.0
  Na  Na1  1  0.527  0.029  0.843  1.0
  Na  Na2  1  0.027  0.471  0.843  1.0
  Na  Na3  1  0.473  0.971  0.157  1.0
  Na  Na4  1  0.027  0.029  0.657  1.0
  Na  Na5  1  0.473  0.529  0.343  1.0
  Na  Na6  1  0.973  0.971  0.343  1.0
  Na  Na7  1  0.973  0.529  0.157  1.0
  U  U8  1  0.500  0.500  0.000  1.0
  U  U9  1  0.000  0.000  0.000  1.0
  U  U10  1  0.000  0.500  0.500  1.0
  U  U11  1  0.500  0.000  0.500  1.0
  O  O12  1  0.808  0.811  0.528  1.0
  O  O13  1  0.473  0.431  0.845  1.0
  O  O14  1  0.308  0.689  0.528  1.0
  O  O15  1  0.192  0.311  0.028  1.0
  O  O16  1  0.527  0.931  0.345  1.0
  O  O17  1  0.473  0.069  0.655  1.0
  O  O18  1  0.692  0.189  0.028  1.0
  O  O19  1  0.192  0.189  0.472  1.0
  O  O20  1  0.027  0.569  0.345  1.0
  O  O21  1  0.692  0.311  0.472  1.0
  O  O22  1  0.308  0.811  0.972  1.0
  O  O23  1  0.027  0.931  0.155  1.0
  O  O24  1  0.973  0.431  0.655  1.0
  O  O25  1  0.808  0.689  0.972  1.0
  O  O26  1  0.527  0.569  0.155  1.0
  O  O27  1  0.973  0.069  0.845  1.0
[/CIF]
.
The crystal structure described by Na2UO4 crystallizes in the orthorhombic Pccn space group. Na(1) is bonded in a 5-coordinate geometry to two equivalent O(1) and three equivalent O(2) atoms. U(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form corner-sharing UO6 octahedra. The corner-sharing octahedral tilt angles are 32°. There are two inequivalent O sites. In the first O site, O(1) is bonded to two equivalent Na(1) and two equivalent U(1) atoms to form a mixture of distorted edge and corner-sharing ONa2U2 trigonal pyramids. In the second O site, O(2) is bonded in a 4-coordinate geometry to three equivalent Na(1) and one U(1) atom. is represented by the Crystallographic Information File (CIF) [CIF]
data_Na2UO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.929
_cell_length_b   5.978
_cell_length_c   12.203
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   432.484
_cell_formula_units_Z   4
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  0.527  0.471  0.657  1.0
  Na  Na1  1  0.527  0.029  0.843  1.0
  Na  Na2  1  0.027  0.471  0.843  1.0
  Na  Na3  1  0.473  0.971  0.157  1.0
  Na  Na4  1  0.027  0.029  0.657  1.0
  Na  Na5  1  0.473  0.529  0.343  1.0
  Na  Na6  1  0.973  0.971  0.343  1.0
  Na  Na7  1  0.973  0.529  0.157  1.0
  U  U8  1  0.500  0.500  0.000  1.0
  U  U9  1  0.000  0.000  0.000  1.0
  U  U10  1  0.000  0.500  0.500  1.0
  U  U11  1  0.500  0.000  0.500  1.0
  O  O12  1  0.808  0.811  0.528  1.0
  O  O13  1  0.473  0.431  0.845  1.0
  O  O14  1  0.308  0.689  0.528  1.0
  O  O15  1  0.192  0.311  0.028  1.0
  O  O16  1  0.527  0.931  0.345  1.0
  O  O17  1  0.473  0.069  0.655  1.0
  O  O18  1  0.692  0.189  0.028  1.0
  O  O19  1  0.192  0.189  0.472  1.0
  O  O20  1  0.027  0.569  0.345  1.0
  O  O21  1  0.692  0.311  0.472  1.0
  O  O22  1  0.308  0.811  0.972  1.0
  O  O23  1  0.027  0.931  0.155  1.0
  O  O24  1  0.973  0.431  0.655  1.0
  O  O25  1  0.808  0.689  0.972  1.0
  O  O26  1  0.527  0.569  0.155  1.0
  O  O27  1  0.973  0.069  0.845  1.0
[/CIF]
.