data_[Er4Tm4C6]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Er  1.2400  1.7500  1.0300
  Tm  1.2500  1.7500  1.0950
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [C2/m]
_cell_length_a [13.9720]
_cell_length_b [3.5730]
_cell_length_c [5.1351]
_cell_angle_alpha [90.0000]
_cell_angle_beta [96.2726]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [12]
_chemical_formula_structural [Er2Tm2C3]
_chemical_formula_sum '[Er4 Tm4 C6]'
_cell_volume [254.8221]
_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
[
  Er  Er0  4  0.0775  0.5000  0.7702  1
  Tm  Tm1  4  0.1886  0.0000  0.2449  1
  C  C2  4  0.1989  0.0000  0.7362  1
  C  C3  2  0.0000  0.0000  0.0000  1
]