data_[Na2Sr4Sn4As8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Sr  0.9500  2.0000  1.3200
  Sn  1.9600  1.4500  0.8300
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [15.5955]
_cell_length_b [4.8609]
_cell_length_c [6.8649]
_cell_angle_alpha [90.0000]
_cell_angle_beta [106.5106]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [NaSr2(SnAs2)2]
_chemical_formula_sum '[Na2 Sr4 Sn4 As8]'
_cell_volume [498.9580]
_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  2  0.0000  0.0000  0.0000  1.0
  Sr  Sr1  4  0.1313  0.0000  0.5745  1.0
  Sn  Sn2  4  0.1576  0.5000  0.0173  1.0
  As  As3  4  0.0015  0.5000  0.3118  1.0
  As  As4  4  0.2189  0.0000  0.2106  1.0
]