data_[Na1Sr2U1Se4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  U  1.3800  1.7500  0.9913
  Se  2.5500  1.1500  1.0133
]
_symmetry_space_group_name_H-M [P2/m]
_cell_length_a [7.4637]
_cell_length_b [4.3161]
_cell_length_c [7.5098]
_cell_angle_alpha [90.0000]
_cell_angle_beta [108.9220]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [10]
_chemical_formula_structural [NaSr2USe4]
_chemical_formula_sum '[Na1 Sr2 U1 Se4]'
_cell_volume [228.8495]
_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  0.0000  0.5000  0.5000  1
  Sr  Sr1  1  0.5000  0.0000  0.5000  1
  Sr  Sr2  1  0.5000  0.5000  0.0000  1
  U  U3  1  0.0000  0.0000  0.0000  1
  Se  Se4  2  0.2327  0.5000  0.2377  1
  Se  Se5  2  0.2374  0.0000  0.7580  1
]