[CIF]
data_MgC2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   14.89280613
_cell_length_b   14.89280613
_cell_length_c   14.89280613
_cell_angle_alpha   169.83478716
_cell_angle_beta   169.83478716
_cell_angle_gamma   14.39476318
_symmetry_Int_Tables_number   1
_chemical_formula_structural   MgC2
_chemical_formula_sum   'Mg4 C8'
_cell_volume   102.88266686
_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
  C  C0  1  1.31938228  0.00000000  14.76940974  1
  C  C1  1  1.31938228  -0.00000000  0.00604745  1
  C  C2  1  -0.00000000  0.00000000  22.15713834  1
  C  C3  1  0.00000000  0.00000000  7.39377604  1
  C  C4  1  1.31938228  0.00000000  10.71563703  1
  C  C5  1  1.31938228  0.00000000  4.05982016  1
  C  C6  1  0.00000000  -0.00000000  18.10336562  1
  C  C7  1  0.00000000  0.00000000  11.44754876  1
  Mg  Mg8  1  0.00000000  1.31938228  5.47602616  1
  Mg  Mg9  1  -0.00000000  1.31938228  9.29943103  1
  Mg  Mg10  1  0.00000000  0.00000000  27.63921195  1
  Mg  Mg11  1  -0.00000000  0.00000000  1.91170243  1
[/CIF]
