data_[Ca4Mg6U2N12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  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 [C2/m]
_cell_length_a [5.8686]
_cell_length_b [10.1327]
_cell_length_c [5.5174]
_cell_angle_alpha [90.0000]
_cell_angle_beta [111.2359]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Ca2Mg3UN6]
_chemical_formula_sum '[Ca4 Mg6 U2 N12]'
_cell_volume [305.8139]
_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
[
  Ca  Ca0  4  0.0000  0.3323  0.0000  1
  Mg  Mg1  4  0.0000  0.1661  0.5000  1
  Mg  Mg2  2  0.0000  0.5000  0.5000  1
  U  U3  2  0.0000  0.0000  0.0000  1
  N  N4  8  0.2403  0.1515  0.2605  1
  N  N5  4  0.2123  0.0000  0.7684  1
]