data_[Pm9Mg3U9N24]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Pm  1.1300  1.8500  1.1100
  Mg  1.3100  1.5000  0.8600
  U  1.3800  1.7500  0.9913
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [R-3m]
_cell_length_a [6.8416]
_cell_length_b [6.8416]
_cell_length_c [17.0801]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [166]
_chemical_formula_structural [Pm3MgU3N8]
_chemical_formula_sum '[Pm9 Mg3 U9 N24]'
_cell_volume [692.3743]
_cell_formula_units_Z [3]
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  9  0.0000  0.5000  0.0000  1
  Mg  Mg1  3  0.0000  0.0000  0.5000  1
  U  U2  9  0.0000  0.5000  0.5000  1
  N  N3  18  0.0066  0.5033  0.7669  1
  N  N4  6  0.0000  0.0000  0.2397  1
]