data_[Na4Ta2P2N8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Ta  1.5000  1.4500  0.8200
  P  2.1900  1.0000  0.5500
  N  3.0400  0.6500  0.6300
]
_symmetry_space_group_name_H-M [Pmn2_1]
_cell_length_a [6.2547]
_cell_length_b [6.4359]
_cell_length_c [5.4557]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [31]
_chemical_formula_structural [Na2TaPN4]
_chemical_formula_sum '[Na4 Ta2 P2 N8]'
_cell_volume [219.6160]
_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  4  0.2499  0.6670  0.5147  1.0
  Ta  Ta1  2  0.0000  0.1376  0.4984  1.0
  P  P2  2  0.0000  0.8370  0.9975  1.0
  N  N3  4  0.2259  0.7070  0.0544  1.0
  N  N4  2  0.0000  0.0536  0.1617  1.0
  N  N5  2  0.0000  0.8999  0.7043  1.0
]