data_[Na2Si4P6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Si  1.9000  1.1000  0.5400
  P  2.1900  1.0000  0.5500
]
_symmetry_space_group_name_H-M [Cmm2]
_cell_length_a [3.3197]
_cell_length_b [10.3794]
_cell_length_c [20.2488]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [35]
_chemical_formula_structural [NaSi2P3]
_chemical_formula_sum '[Na2 Si4 P6]'
_cell_volume [697.7003]
_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  0.3459  1
  Si  Si1  4  0.0000  0.1548  0.4914  1
  P  P2  4  0.0000  0.1766  0.6051  1
  P  P3  2  0.0000  0.5000  0.4612  1
]