data_[Ta2Nb2C4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ta  1.5000  1.4500  0.8200
  Nb  1.6000  1.4500  0.8200
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [3.1004]
_cell_length_b [3.1270]
_cell_length_c [10.2191]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [TaNbC2]
_chemical_formula_sum '[Ta2 Nb2 C4]'
_cell_volume [99.0747]
_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
[
  Ta  Ta0  2  0.5000  0.0000  0.1470  1
  Nb  Nb1  2  0.0000  0.0000  0.8568  1
  C  C2  2  0.0000  0.0000  0.6376  1
  C  C3  2  0.5000  0.0000  0.3586  1
]