data_Na2SrSe
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.93
_cell_length_b   7.93
_cell_length_c   4.34
_cell_angle_alpha   101.01
_cell_angle_beta   101.01
_cell_angle_gamma   32.03
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2SrSe
_chemical_formula_sum   'Na2 Sr1 Se1'
_cell_volume   141.82
_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  0.6  0.0  0.37  1.0
  Na  Na1  1  0.78  0.0  0.88  1.0
  Sr  Sr3  1  0.19  0.0  0.13  1.0
  Se  Se2  1  0.0  0.0  0.0  1.0

data_Na2SrSe
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.34
_cell_length_b   4.38
_cell_length_c   7.93
_cell_angle_alpha   106.01
_cell_angle_beta   101.01
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2SrSe
_chemical_formula_sum   'Na2 Sr1 Se1'
_cell_volume   141.82
_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  0.12  0.0  0.22  1.0
  Na  Na1  1  0.63  0.0  0.4  1.0
  Sr  Sr2  1  0.87  0.0  0.81  1.0
  Se  Se3  1  0.0  0.0  0.0  1.0

Na Na Sr Se