data_[Na1Ag3Sn7]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ag  1.9300  1.6000  1.0867
  Sn  1.9600  1.4500  0.8300
]
_symmetry_space_group_name_H-M [P3m1]
_cell_length_a [7.0285]
_cell_length_b [7.0285]
_cell_length_c [6.7265]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [120.0000]
_symmetry_Int_Tables_number [156]
_chemical_formula_structural [NaAg3Sn7]
_chemical_formula_sum '[Na1 Ag3 Sn7]'
_cell_volume [287.7728]
_cell_formula_units_Z [1]
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  1  0.0000  0.0000  0.4742  1.0
  Ag  Ag1  3  0.1899  0.3799  0.7855  1.0
  Sn  Sn2  3  0.3375  0.1688  0.0681  1.0
  Sn  Sn3  3  0.5182  0.0363  0.4799  1.0
  Sn  Sn4  1  0.3333  0.6667  0.1402  1.0
]