data_[Sr6Mg3Cl3]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Sr  0.9500  2.0000  1.3200
  Mg  1.3100  1.5000  0.8600
  Cl  3.1600  1.0000  0.7800
]
_symmetry_space_group_name_H-M [R3m]
_cell_length_a [4.1808]
_cell_length_b [4.1808]
_cell_length_c [33.6406]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [160]
_chemical_formula_structural [Sr2MgCl]
_chemical_formula_sum '[Sr6 Mg3 Cl3]'
_cell_volume [509.2195]
_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
[
  Sr  Sr0  3  0.0000  0.0000  0.7687  1
  Sr  Sr1  3  0.0000  0.0000  0.9959  1
  Mg  Mg2  3  0.0000  0.0000  0.2501  1
  Cl  Cl3  3  0.0000  0.0000  0.4854  1
]