data_Sr2Sn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   8.28
_cell_length_b   8.28
_cell_length_c   8.28
_cell_angle_alpha   152.3
_cell_angle_beta   152.3
_cell_angle_gamma   39.57
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2Sn
_chemical_formula_sum   'Sr2 Sn1'
_cell_volume   122.25
_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
  Sr  Sr1  1  0.0  0.0  0.86  1.0
  Sr  Sr2  1  0.0  0.0  0.71  1.0
  Sn  Sn0  1  0.0  0.0  0.0  1.0

data_Sr2Sn
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.6
_cell_length_b   5.6
_cell_length_c   8.28
_cell_angle_alpha   90.0
_cell_angle_beta   109.79
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Sr2Sn
_chemical_formula_sum   'Sr4 Sn2'
_cell_volume   244.5
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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  2  0.21  0.5  0.71  1.0
  Sr  Sr1  2  0.36  0.5  0.86  1.0
  Sn  Sn2  2  0.0  0.0  0.0  1.0

Sr Sr Sn