data_[Na12Mg2Sn4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Mg  1.3100  1.5000  0.8600
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [10.5259]
_cell_length_b [5.5232]
_cell_length_c [9.3809]
_cell_angle_alpha [90.0000]
_cell_angle_beta [96.2176]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na6MgSn2]
_chemical_formula_sum '[Na12 Mg2 Sn4]'
_cell_volume [542.1642]
_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
[
  Na  Na0  4  0.0199  0.5000  0.7144  1.0
  Na  Na1  4  0.1732  0.0000  0.5965  1.0
  Na  Na2  4  0.1972  0.5000  0.0631  1.0
  Mg  Mg3  2  0.0000  0.0000  0.0000  1.0
  Sn  Sn4  4  0.1608  0.0000  0.2556  1.0
]