data_Na2AsP
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.57
_cell_length_b   3.93
_cell_length_c   5.58
_cell_angle_alpha   90.0
_cell_angle_beta   113.26
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2AsP
_chemical_formula_sum   'Na2 As1 P1'
_cell_volume   92.11
_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  Na1  1  0.33  0.0  0.48  1.0
  Na  Na2  1  0.73  0.96  0.34  1.0
  As  As0  1  0.05  0.96  0.24  1.0
  P  P3  1  0.02  0.0  0.63  1.0

data_Na2AsP
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.93
_cell_length_b   4.57
_cell_length_c   5.58
_cell_angle_alpha   113.26
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2AsP
_chemical_formula_sum   'Na2 As1 P1'
_cell_volume   92.11
_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  0.0  0.67  0.52  1.0
  Na  Na1  1  0.04  0.27  0.66  1.0
  As  As2  1  0.04  0.95  0.76  1.0
  P  P3  1  0.0  0.98  0.37  1.0

Na Na As P