data_[Na4Sr2Sb4Pb2]
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
  Sb  2.0500  1.4500  0.8300
  Pb  2.3300  1.8000  1.1225
]
_symmetry_space_group_name_H-M [Pmc2_1]
_cell_length_a [4.8209]
_cell_length_b [9.6828]
_cell_length_c [8.5378]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [26]
_chemical_formula_structural [Na2SrSb2Pb]
_chemical_formula_sum '[Na4 Sr2 Sb4 Pb2]'
_cell_volume [398.5435]
_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  0.1832  0.3688  1.0
  Na  Na1  2  0.5000  0.0816  0.0507  1.0
  Sr  Sr2  2  0.0000  0.4245  0.9691  1.0
  Sb  Sb3  2  0.0000  0.1246  0.7680  1.0
  Sb  Sb4  2  0.5000  0.3908  0.2555  1.0
  Pb  Pb5  2  0.5000  0.2961  0.6334  1.0
]