data_[Mg8Pb4C4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Mg  1.3100  1.5000  0.8600
  Pb  2.3300  1.8000  1.1225
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [I-42d]
_cell_length_a [7.1938]
_cell_length_b [7.1938]
_cell_length_c [6.4396]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [122]
_chemical_formula_structural [Mg2PbC]
_chemical_formula_sum '[Mg8 Pb4 C4]'
_cell_volume [333.2529]
_cell_formula_units_Z [4]
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
[
  Mg  Mg0  8  0.1183  0.2500  0.6250  1
  Pb  Pb1  4  0.0000  0.0000  0.0000  1
  C  C2  4  0.0000  0.0000  0.5000  1
]