data_[Ca4Al2Cu2]
loop_
 _atom_type_symbol
 _atom_type_electronegativity
 _atom_type_radius
 _atom_type_ionic_radius
[
  Ca  1.0000  1.8000  1.1400
  Al  1.6100  1.2500  0.6750
  Cu  1.9000  1.3500  0.8200
]
_symmetry_space_group_name_H-M [Amm2]
_cell_length_a [4.3315]
_cell_length_b [4.4986]
_cell_length_c [10.9426]
_cell_angle_alpha [90.0000]
_cell_angle_beta [90.0000]
_cell_angle_gamma [90.0000]
_symmetry_Int_Tables_number [38]
_chemical_formula_structural [Ca2AlCu]
_chemical_formula_sum '[Ca4 Al2 Cu2]'
_cell_volume [213.2260]
_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  0.0000  0.1047  1.0
  Ca  Ca1  2  0.5000  0.0000  0.3952  1.0
  Al  Al2  2  0.5000  0.0000  0.6938  1.0
  Cu  Cu3  2  0.0000  0.0000  0.8053  1.0
]