data_[Na4Mg2Sn4O12]
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
  O  3.4400  0.6000  1.2600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [5.4471]
_cell_length_b [9.5397]
_cell_length_c [5.8535]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.7532]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Na2Mg(SnO3)2]
_chemical_formula_sum '[Na4 Mg2 Sn4 O12]'
_cell_volume [291.2635]
_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  0.0000  0.1624  0.0000  1.0
  Mg  Mg1  2  0.0000  0.0000  0.5000  1.0
  Sn  Sn2  4  0.0000  0.3352  0.5000  1.0
  O  O3  8  0.2290  0.1743  0.6987  1.0
  O  O4  4  0.2300  0.5000  0.6899  1.0
]