data_[Sr2Mg12Sn7]
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
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [P-3]
_cell_length_a [11.7212]
_cell_length_b [11.7212]
_cell_length_c [4.6095]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [147]
_chemical_formula_structural [Sr2Mg12Sn7]
_chemical_formula_sum '[Sr2 Mg12 Sn7]'
_cell_volume [548.4408]
_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
[
  Sr  Sr0  2  0.3333  0.6667  0.2555  1
  Mg  Mg1  6  0.0466  0.6183  0.7492  1
  Mg  Mg2  6  0.1100  0.8504  0.2514  1
  Sn  Sn3  6  0.1250  0.4178  0.7551  1
  Sn  Sn4  1  0.0000  0.0000  0.5000  1
]