data_[Sr4Pm4Si4N12]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Pm  1.1300  1.8500  1.1100
  Si  1.9000  1.1000  0.5400
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [12.7974]
_cell_length_b [3.8459]
_cell_length_c [7.3726]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.4552]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [SrPmSiN3]
_chemical_formula_sum '[Sr4 Pm4 Si4 N12]'
_cell_volume [348.0012]
_cell_formula_units_Z [4]
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
[
  Sr  Sr0  4  0.1477  0.5000  0.0717  1
  Pm  Pm1  4  0.1502  0.5000  0.5774  1
  Si  Si2  4  0.0027  0.0000  0.2659  1
  N  N3  4  0.0039  0.5000  0.2762  1
  N  N4  4  0.1431  0.0000  0.8080  1
  N  N5  4  0.1500  0.0000  0.3360  1
]