data_Sr2SnPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   4.02
_cell_length_b   4.26
_cell_length_c   8.0
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Sr2SnPb
_chemical_formula_sum   'Sr2 Sn1 Pb1'
_cell_volume   136.94
_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  Sr2  1  0.01  0.13  0.95  1.0
  Sr  Sr3  1  0.01  0.13  0.05  1.0
  Sn  Sn1  1  0.0  0.0  0.0  1.0
  Pb  Pb0  1  0.0  0.0  0.0  1.0

data_Sr2SnPb
_symmetry_space_group_name_H-M   Pmm2
_cell_length_a   4.02
_cell_length_b   8.0
_cell_length_c   4.26
_cell_angle_alpha   90.0
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   25
_chemical_formula_structural   Sr2SnPb
_chemical_formula_sum   'Sr2 Sn1 Pb1'
_cell_volume   136.94
_cell_formula_units_Z   1
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-x, -y, z'
  3  '-x, y, z'
  4  '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  2  0.0  0.05  0.87  1.0
  Sn  Sn1  1  0.0  0.0  0.0  1.0
  Pb  Pb2  1  0.0  0.0  0.0  1.0

Sr Sr Sn Pb 0 3 o o + 0 2 o o + 0 1 o o + 1 3 o o o 1 2 o o o 2 3 o o o 