data_Na2PtSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.01
_cell_length_b   5.01
_cell_length_c   5.35
_cell_angle_alpha   99.81
_cell_angle_beta   99.81
_cell_angle_gamma   36.35
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2PtSe
_chemical_formula_sum   'Na2 Pt1 Se1'
_cell_volume   78.13
_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  0.67  0.0  0.93  1.0
  Na  Na1  1  0.89  0.0  0.33  1.0
  Pt  Pt2  1  0.28  0.0  0.63  1.0
  Se  Se3  1  0.0  0.0  0.0  1.0

data_Na2PtSe
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.12
_cell_length_b   5.01
_cell_length_c   5.35
_cell_angle_alpha   99.81
_cell_angle_beta   90.0
_cell_angle_gamma   108.17
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2PtSe
_chemical_formula_sum   'Na2 Pt1 Se1'
_cell_volume   78.13
_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  0.11  0.67  1.0
  Na  Na1  1  0.0  0.33  0.07  1.0
  Pt  Pt2  1  0.0  0.72  0.37  1.0
  Se  Se3  1  0.0  0.0  0.0  1.0

Na Na Pt Se