data_[Na4Mg6Sn4]
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 [11.0469]
_cell_length_b [4.6558]
_cell_length_c [7.9580]
_cell_angle_alpha [90.0000]
_cell_angle_beta [112.0479]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Mg3Sn2]
_chemical_formula_sum '[Na4 Mg6 Sn4]'
_cell_volume [379.3662]
_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  0.1442  0.0000  0.7856  1
  Mg  Mg1  4  0.1245  0.5000  0.4358  1
  Mg  Mg2  2  0.0000  0.5000  0.0000  1
  Sn  Sn3  4  0.1501  0.0000  0.2147  1
]