data_[Ca12Mg4Sn8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Mg  1.3100  1.5000  0.8600
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [Ibam]
_cell_length_a [6.8283]
_cell_length_b [15.9981]
_cell_length_c [6.7317]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [72]
_chemical_formula_structural [Ca3MgSn2]
_chemical_formula_sum '[Ca12 Mg4 Sn8]'
_cell_volume [735.3734]
_cell_formula_units_Z [4]
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
[
  Ca  Ca0  8  0.2262  0.1765  0.0000  1.0
  Ca  Ca1  4  0.0000  0.5000  0.2500  1.0
  Mg  Mg2  4  0.0000  0.0000  0.2500  1.0
  Sn  Sn3  8  0.2416  0.1233  0.5000  1.0
]