data_Na2MnPb
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.05
_cell_length_b   6.05
_cell_length_c   6.05
_cell_angle_alpha   137.84
_cell_angle_beta   137.84
_cell_angle_gamma   61.15
_symmetry_Int_Tables_number   1
_chemical_formula_structural   Na2MnPb
_chemical_formula_sum   'Na2 Mn1 Pb1'
_cell_volume   98.58
_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  Na1  1  0.18  0.0  0.6  1.0
  Na  Na2  1  0.0  0.18  0.6  1.0
  Mn  Mn0  1  0.0  0.0  0.0  1.0
  Pb  Pb3  1  0.0  0.0  0.21  1.0

data_Na2MnPb
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.15
_cell_length_b   6.15
_cell_length_c   6.05
_cell_angle_alpha   90.0
_cell_angle_beta   120.57
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   Na2MnPb
_chemical_formula_sum   'Na4 Mn2 Pb2'
_cell_volume   197.15
_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
  Na  Na0  4  0.41  0.41  0.43  1.0
  Mn  Mn1  2  0.0  0.0  0.0  1.0
  Pb  Pb2  2  0.0  0.0  0.21  1.0

Na Na Mn Pb