data_[Ge8C8]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ge  2.0100  1.2500  0.7700
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [P4/m]
_cell_length_a [9.0011]
_cell_length_b [9.0011]
_cell_length_c [3.3318]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [83]
_chemical_formula_structural [GeC]
_chemical_formula_sum '[Ge8 C8]'
_cell_volume [269.9414]
_cell_formula_units_Z [8]
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
[
  Ge  Ge0  4  0.1122  0.3947  0.0000  1
  Ge  Ge1  4  0.2221  0.6279  0.5000  1
  C  C2  4  0.1051  0.6263  0.0000  1
  C  C3  4  0.2334  0.3898  0.5000  1
]