data_[Ba1Sr2N2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ba  0.8900  2.1500  1.4900
  Sr  0.9500  2.0000  1.3200
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [P-6m2]
_cell_length_a [3.9559]
_cell_length_b [3.9559]
_cell_length_c [20.9416]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [187]
_chemical_formula_structural [BaSr2N2]
_chemical_formula_sum '[Ba1 Sr2 N2]'
_cell_volume [283.8197]
_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
[
  Ba  Ba0  1  0.6667  0.3333  0.5000  1
  Sr  Sr1  2  0.3333  0.6667  0.6419  1
  N  N2  2  0.0000  0.0000  0.4080  1
]