The crystal structure described by Na2UO4 crystallizes in the orthorhombic Pbca space group. Na(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(2) atoms. U(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing UO6 octahedra. The corner-sharing octahedral tilt angles are 37°. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Na(1) and one U(1) atom to form distorted corner-sharing ONa3U tetrahedra. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Na(1) and two equivalent U(1) atoms. is represented by the CIF card [CIF]
data_Na2UO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.760
_cell_length_b   5.936
_cell_length_c   11.694
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   399.897
_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  0.003  0.058  0.335  1.0
  Na  Na1  1  0.503  0.442  0.665  1.0
  Na  Na2  1  0.997  0.558  0.165  1.0
  Na  Na3  1  0.497  0.942  0.835  1.0
  Na  Na4  1  0.503  0.058  0.165  1.0
  Na  Na5  1  0.003  0.442  0.835  1.0
  Na  Na6  1  0.497  0.558  0.335  1.0
  Na  Na7  1  0.997  0.942  0.665  1.0
  U  U8  1  0.000  0.000  0.000  1.0
  U  U9  1  0.500  0.500  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  0.612  0.959  0.346  1.0
  O  O13  1  0.112  0.541  0.654  1.0
  O  O14  1  0.388  0.459  0.154  1.0
  O  O15  1  0.888  0.041  0.846  1.0
  O  O16  1  0.388  0.041  0.654  1.0
  O  O17  1  0.888  0.459  0.346  1.0
  O  O18  1  0.612  0.541  0.846  1.0
  O  O19  1  0.112  0.959  0.154  1.0
  O  O20  1  0.800  0.206  0.548  1.0
  O  O21  1  0.300  0.294  0.452  1.0
  O  O22  1  0.200  0.706  0.952  1.0
  O  O23  1  0.700  0.794  0.048  1.0
  O  O24  1  0.300  0.206  0.952  1.0
  O  O25  1  0.800  0.294  0.048  1.0
  O  O26  1  0.700  0.706  0.548  1.0
  O  O27  1  0.200  0.794  0.452  1.0
[/CIF]
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The crystal structure described by Na2UO4 crystallizes in the orthorhombic Pbca space group. Na(1) is bonded in a 6-coordinate geometry to three equivalent O(1) and three equivalent O(2) atoms. U(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form corner-sharing UO6 octahedra. The corner-sharing octahedral tilt angles are 37°. There are two inequivalent O sites. In the first O site, O(1) is bonded to three equivalent Na(1) and one U(1) atom to form distorted corner-sharing ONa3U tetrahedra. In the second O site, O(2) is bonded in a 5-coordinate geometry to three equivalent Na(1) and two equivalent U(1) atoms. is represented by the CIF card [CIF]
data_Na2UO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.760
_cell_length_b   5.936
_cell_length_c   11.694
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   90.000
_symmetry_Int_Tables_number   1
_cell_volume   399.897
_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  0.003  0.058  0.335  1.0
  Na  Na1  1  0.503  0.442  0.665  1.0
  Na  Na2  1  0.997  0.558  0.165  1.0
  Na  Na3  1  0.497  0.942  0.835  1.0
  Na  Na4  1  0.503  0.058  0.165  1.0
  Na  Na5  1  0.003  0.442  0.835  1.0
  Na  Na6  1  0.497  0.558  0.335  1.0
  Na  Na7  1  0.997  0.942  0.665  1.0
  U  U8  1  0.000  0.000  0.000  1.0
  U  U9  1  0.500  0.500  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  0.612  0.959  0.346  1.0
  O  O13  1  0.112  0.541  0.654  1.0
  O  O14  1  0.388  0.459  0.154  1.0
  O  O15  1  0.888  0.041  0.846  1.0
  O  O16  1  0.388  0.041  0.654  1.0
  O  O17  1  0.888  0.459  0.346  1.0
  O  O18  1  0.612  0.541  0.846  1.0
  O  O19  1  0.112  0.959  0.154  1.0
  O  O20  1  0.800  0.206  0.548  1.0
  O  O21  1  0.300  0.294  0.452  1.0
  O  O22  1  0.200  0.706  0.952  1.0
  O  O23  1  0.700  0.794  0.048  1.0
  O  O24  1  0.300  0.206  0.952  1.0
  O  O25  1  0.800  0.294  0.048  1.0
  O  O26  1  0.700  0.706  0.548  1.0
  O  O27  1  0.200  0.794  0.452  1.0
[/CIF]
.