data_[Na2Sr2P2]
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
  P  2.1900  1.0000  0.5500
]
_symmetry_space_group_name_H-M [Pma2]
_cell_length_a [3.7111]
_cell_length_b [7.2069]
_cell_length_c [20.5780]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [28]
_chemical_formula_structural [NaSrP]
_chemical_formula_sum '[Na2 Sr2 P2]'
_cell_volume [550.3706]
_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  0.2500  0.7607  0.4718  1
  Sr  Sr1  2  0.2500  0.2468  0.6496  1
  P  P2  2  0.2500  0.4122  0.3786  1
]