data_[Na8Sn4P8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sn  1.9600  1.4500  0.8300
  P  2.1900  1.0000  0.5500
]
_symmetry_space_group_name_H-M [Ibam]
_cell_length_a [7.1554]
_cell_length_b [10.9604]
_cell_length_c [6.8041]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [72]
_chemical_formula_structural [Na2SnP2]
_chemical_formula_sum '[Na8 Sn4 P8]'
_cell_volume [533.6193]
_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
[
  Na  Na0  8  0.1178  0.1410  0.5000  1.0
  Sn  Sn1  4  0.0000  0.5000  0.2500  1.0
  P  P2  8  0.2103  0.3927  0.5000  1.0
]