data_[Y2Cu2C2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Y  1.2200  1.8000  1.0400
  Cu  1.9000  1.3500  0.8200
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [Pmm2]
_cell_length_a [3.5484]
_cell_length_b [3.7035]
_cell_length_c [7.1767]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [25]
_chemical_formula_structural [YCuC]
_chemical_formula_sum '[Y2 Cu2 C2]'
_cell_volume [94.3116]
_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
[
  Y  Y0  1  0.0000  0.0000  0.5155  1
  Y  Y1  1  0.5000  0.5000  0.1463  1
  Cu  Cu2  1  0.0000  0.0000  0.9371  1
  Cu  Cu3  1  0.5000  0.5000  0.7467  1
  C  C4  1  0.0000  0.5000  0.8881  1
  C  C5  1  0.5000  0.5000  0.4708  1
]