The compound described by Na2UO4 crystallizes in the orthorhombic Cmmm space group. Na(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form distorted NaO6 octahedra that share corners with six equivalent Na(1)O6 octahedra, edges with four equivalent Na(1)O6 octahedra, and edges with four equivalent U(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 18-25°. U(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form UO6 octahedra that share edges with two equivalent U(1)O6 octahedra and edges with eight equivalent Na(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a see-saw-like geometry to two equivalent Na(1) and two equivalent U(1) atoms. In the second O site, O(2) is bonded to four equivalent Na(1) and one U(1) atom to form a mixture of distorted edge and corner-sharing ONa4U square pyramids. is represented by the CIF card [CIF]
data_Na2UO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.034
_cell_length_b   6.034
_cell_length_c   3.501
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   111.835
_symmetry_Int_Tables_number   1
_cell_volume   118.313
_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
  Na  Na0  1  0.500  0.000  0.500  1.0
  Na  Na1  1  0.000  0.500  0.500  1.0
  U  U2  1  0.000  0.000  0.000  1.0
  O  O3  1  0.192  0.192  0.500  1.0
  O  O4  1  0.196  0.804  0.000  1.0
  O  O5  1  0.808  0.808  0.500  1.0
  O  O6  1  0.804  0.196  0.000  1.0
[/CIF]
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The compound described by Na2UO4 crystallizes in the orthorhombic Cmmm space group. Na(1) is bonded to two equivalent O(1) and four equivalent O(2) atoms to form distorted NaO6 octahedra that share corners with six equivalent Na(1)O6 octahedra, edges with four equivalent Na(1)O6 octahedra, and edges with four equivalent U(1)O6 octahedra. The corner-sharing octahedral tilt angles range from 18-25°. U(1) is bonded to two equivalent O(2) and four equivalent O(1) atoms to form UO6 octahedra that share edges with two equivalent U(1)O6 octahedra and edges with eight equivalent Na(1)O6 octahedra. There are two inequivalent O sites. In the first O site, O(1) is bonded in a see-saw-like geometry to two equivalent Na(1) and two equivalent U(1) atoms. In the second O site, O(2) is bonded to four equivalent Na(1) and one U(1) atom to form a mixture of distorted edge and corner-sharing ONa4U square pyramids. is represented by the CIF card [CIF]
data_Na2UO4
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.034
_cell_length_b   6.034
_cell_length_c   3.501
_cell_angle_alpha   90.000
_cell_angle_beta   90.000
_cell_angle_gamma   111.835
_symmetry_Int_Tables_number   1
_cell_volume   118.313
_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
  Na  Na0  1  0.500  0.000  0.500  1.0
  Na  Na1  1  0.000  0.500  0.500  1.0
  U  U2  1  0.000  0.000  0.000  1.0
  O  O3  1  0.192  0.192  0.500  1.0
  O  O4  1  0.196  0.804  0.000  1.0
  O  O5  1  0.808  0.808  0.500  1.0
  O  O6  1  0.804  0.196  0.000  1.0
[/CIF]
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