data_K2AlCu
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   6.13
_cell_length_b   6.13
_cell_length_c   3.69
_cell_angle_alpha   90.78
_cell_angle_beta   90.78
_cell_angle_gamma   113.9
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2AlCu
_chemical_formula_sum   'K2 Al1 Cu1'
_cell_volume   126.74
_cell_formula_units_Z   1
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  K2  1  0.63  0.57  0.84  1.0
  K  K3  1  0.63  0.43  0.84  1.0
  Al  Al0  1  0.0  0.0  0.0  1.0
  Cu  Cu1  1  0.34  0.0  0.0  1.0

data_K2AlCu
_symmetry_space_group_name_H-M   P1
_cell_length_a   3.69
_cell_length_b   6.13
_cell_length_c   6.13
_cell_angle_alpha   113.9
_cell_angle_beta   90.78
_cell_angle_gamma   90.78
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2AlCu
_chemical_formula_sum   'K2 Al1 Cu1'
_cell_volume   126.74
_cell_formula_units_Z   1
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  1  0.84  0.63  0.43  1.0
  K  K1  1  0.84  0.63  0.57  1.0
  Al  Al2  1  0.0  0.0  0.0  1.0
  Cu  Cu3  1  0.0  0.34  0.0  1.0

K K Al Cu