data_[K2Al2Cr4]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  K  0.8200  2.2000  1.5200
  Al  1.6100  1.2500  0.6750
  Cr  1.6600  1.4000  0.9400
]
_symmetry_space_group_name_H-M [Immm]
_cell_length_a [3.0777]
_cell_length_b [5.7963]
_cell_length_c [10.6395]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [71]
_chemical_formula_structural [KAlCr2]
_chemical_formula_sum '[K2 Al2 Cr4]'
_cell_volume [189.7993]
_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
[
  K  K0  2  0.0000  0.5000  0.5000  1
  Al  Al1  2  0.0000  0.5000  0.0000  1
  Cr  Cr2  4  0.0000  0.0000  0.2963  1
]