[CIF]
data_NaC
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.83503439
_cell_length_b   6.83503439
_cell_length_c   2.63205315
_cell_angle_alpha   90.00000000
_cell_angle_beta   90.00000000
_cell_angle_gamma   149.84800105
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaC
_chemical_formula_sum   'Na2 C2'
_cell_volume   61.76401565
_cell_formula_units_Z   2
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  1.77779286  -0.21143781  0.65801329  1
  C  C1  1  1.77779286  0.21143781  1.97403986  1
  Na  Na2  1  1.77779286  -4.81954487  0.65801329  1
  Na  Na3  1  1.77779286  4.81954487  1.97403986  1
[/CIF]
