data_Sr2Se
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   7.36
_cell_length_b   7.63
_cell_length_c   4.35
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2Se
_chemical_formula_sum   'Sr4 Se2'
_cell_volume   244.18
_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
  Sr  Sr2  1  0.82  0.11  0.0  1.0
  Sr  Sr3  1  0.55  0.53  0.0  1.0
  Sr  Sr4  1  0.5  0.34  0.17  1.0
  Sr  Sr5  1  0.87  0.29  0.17  1.0
  Se  Se0  1  0.0  0.0  0.0  1.0
  Se  Se1  1  0.68  0.82  0.17  1.0

data_Sr2Se
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.35
_cell_length_b   7.36
_cell_length_c   7.63
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2Se
_chemical_formula_sum   'Sr4 Se2'
_cell_volume   244.18
_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
  Sr  Sr0  1  0.0  0.55  0.53  1.0
  Sr  Sr1  1  0.0  0.82  0.11  1.0
  Sr  Sr2  1  0.17  0.5  0.34  1.0
  Sr  Sr3  1  0.17  0.87  0.29  1.0
  Se  Se4  1  0.0  0.0  0.0  1.0
  Se  Se5  1  0.17  0.68  0.82  1.0

Sr Sr Sr Sr Se Se