data_NaPt
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   2.77
_cell_length_b   4.43
_cell_length_c   5.93
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaPt
_chemical_formula_sum   'Na2 Pt2'
_cell_volume   73.01
_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  1  0.0  0.0  0.75  1.0
  Na  Na1  1  0.39  0.22  0.18  1.0
  Pt  Pt2  1  0.0  0.0  0.55  1.0
  Pt  Pt3  1  0.39  0.22  0.39  1.0

data_NaPt
_symmetry_space_group_name_H-M   P-1
_cell_length_a   2.77
_cell_length_b   4.43
_cell_length_c   5.93
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   NaPt
_chemical_formula_sum   'Na2 Pt2'
_cell_volume   73.01
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  0.19  0.11  0.72  1.0
  Pt  Pt1  2  0.19  0.11  0.92  1.0

Na Na Pt Pt
Na Na Pt Pt 0 2 o o o 1 3 o o o 