The material structure described by Na2UO4 crystallizes in the orthorhombic Pbam space group. Na(1) is bonded in a 7-coordinate geometry to three equivalent O(2) and four equivalent O(1) atoms. U(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form edge-sharing UO6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to four equivalent Na(1) and one U(1) atom. In the second O site, O(2) is bonded to three equivalent Na(1) and two equivalent U(1) atoms to form a mixture of edge and corner-sharing ONa3U2 trigonal bipyramids. is represented by the CIF card [CIF]
data_Na2UO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.499
_cell_length_b   5.660
_cell_length_c   9.687
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   191.874
_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  0.500  0.443  0.185  1.0
  Na  Na1  1  0.500  0.057  0.685  1.0
  Na  Na2  1  0.500  0.943  0.315  1.0
  Na  Na3  1  0.500  0.557  0.815  1.0
  U  U4  1  0.000  0.000  0.000  1.0
  U  U5  1  0.000  0.500  0.500  1.0
  O  O6  1  0.000  0.353  0.679  1.0
  O  O7  1  0.500  0.288  0.446  1.0
  O  O8  1  0.000  0.853  0.821  1.0
  O  O9  1  0.500  0.712  0.554  1.0
  O  O10  1  0.000  0.647  0.321  1.0
  O  O11  1  0.500  0.212  0.946  1.0
  O  O12  1  0.000  0.147  0.179  1.0
  O  O13  1  0.500  0.788  0.054  1.0
[/CIF]
.
The material structure described by Na2UO4 crystallizes in the orthorhombic Pbam space group. Na(1) is bonded in a 7-coordinate geometry to three equivalent O(2) and four equivalent O(1) atoms. U(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form edge-sharing UO6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a 5-coordinate geometry to four equivalent Na(1) and one U(1) atom. In the second O site, O(2) is bonded to three equivalent Na(1) and two equivalent U(1) atoms to form a mixture of edge and corner-sharing ONa3U2 trigonal bipyramids. is represented by the CIF card [CIF]
data_Na2UO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   3.499
_cell_length_b   5.660
_cell_length_c   9.687
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   191.874
_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  0.500  0.443  0.185  1.0
  Na  Na1  1  0.500  0.057  0.685  1.0
  Na  Na2  1  0.500  0.943  0.315  1.0
  Na  Na3  1  0.500  0.557  0.815  1.0
  U  U4  1  0.000  0.000  0.000  1.0
  U  U5  1  0.000  0.500  0.500  1.0
  O  O6  1  0.000  0.353  0.679  1.0
  O  O7  1  0.500  0.288  0.446  1.0
  O  O8  1  0.000  0.853  0.821  1.0
  O  O9  1  0.500  0.712  0.554  1.0
  O  O10  1  0.000  0.647  0.321  1.0
  O  O11  1  0.500  0.212  0.946  1.0
  O  O12  1  0.000  0.147  0.179  1.0
  O  O13  1  0.500  0.788  0.054  1.0
[/CIF]
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