data_[Pm4U2N6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  U  1.3800  1.7500  0.9913
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [3.5229]
_cell_length_b [5.0230]
_cell_length_c [10.5979]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [Pm2UN3]
_chemical_formula_sum '[Pm4 U2 N6]'
_cell_volume [187.5373]
_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
[
  Pm  Pm0  4  0.0000  0.5000  0.1667  1
  U  U1  2  0.0000  0.5000  0.5000  1
  N  N2  4  0.0000  0.0000  0.1387  1
  N  N3  2  0.0000  0.0000  0.5000  1
]