data_SrMgPb2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.92
_cell_length_b   5.92
_cell_length_c   5.92
_cell_angle_alpha   129.06
_cell_angle_beta   129.06
_cell_angle_gamma   74.92
_symmetry_Int_Tables_number   1
_chemical_formula_structural   SrMgPb2
_chemical_formula_sum   'Sr1 Mg1 Pb2'
_cell_volume   122.1
_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  Sr3  1  0.0  0.0  0.7  1.0
  Mg  Mg0  1  0.0  0.0  0.0  1.0
  Pb  Pb1  1  0.55  0.0  0.35  1.0
  Pb  Pb2  1  0.0  0.55  0.35  1.0

data_SrMgPb2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   7.21
_cell_length_b   7.21
_cell_length_c   5.92
_cell_angle_alpha   90.0
_cell_angle_beta   127.46
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   SrMgPb2
_chemical_formula_sum   'Sr2 Mg2 Pb4'
_cell_volume   244.19
_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  0.3  0.0  0.3  1.0
  Mg  Mg1  2  0.0  0.0  0.0  1.0
  Pb  Pb2  4  0.42  0.23  0.2  1.0

Sr Mg Pb Pb