data_[Sr6Al2N6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Al  1.6100  1.2500  0.6750
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [P6_3/m]
_cell_length_a [7.6614]
_cell_length_b [7.6614]
_cell_length_c [5.3903]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [176]
_chemical_formula_structural [Sr3AlN3]
_chemical_formula_sum '[Sr6 Al2 N6]'
_cell_volume [274.0028]
_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
[
  Sr  Sr0  6  0.0723  0.7130  0.2500  1.0
  Al  Al1  2  0.3333  0.6667  0.7500  1.0
  N  N2  6  0.1059  0.6954  0.7500  1.0
]