data_[Ca2Cr2C2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Cr  1.6600  1.4000  0.9400
  C  2.5500  0.7000  0.3000
]
_symmetry_space_group_name_H-M [P4/nmm]
_cell_length_a [3.3345]
_cell_length_b [3.3345]
_cell_length_c [8.6873]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [129]
_chemical_formula_structural [CaCrC]
_chemical_formula_sum '[Ca2 Cr2 C2]'
_cell_volume [96.5953]
_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
[
  Ca  Ca0  2  0.0000  0.5000  0.7964  1.0
  Cr  Cr1  2  0.0000  0.0000  0.5000  1.0
  C  C2  2  0.0000  0.5000  0.3561  1.0
]