data_[Na4Co2As4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Na  0.9300  1.8000  1.1600
  Co  1.8800  1.3500  0.7683
  As  2.1800  1.1500  0.6600
]
_symmetry_space_group_name_H-M [P4/mbm]
_cell_length_a [6.1345]
_cell_length_b [6.1345]
_cell_length_c [4.9670]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [127]
_chemical_formula_structural [Na2CoAs2]
_chemical_formula_sum '[Na4 Co2 As4]'
_cell_volume [186.9190]
_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  0.1770  0.3230  0.5000  1.0
  Co  Co1  2  0.0000  0.0000  0.0000  1.0
  As  As2  4  0.1459  0.6459  0.0000  1.0
]