data_K2CuSn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.05
_cell_length_b   4.69
_cell_length_c   6.76
_cell_angle_alpha   90.0
_cell_angle_beta   111.32
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2CuSn
_chemical_formula_sum   'K2 Cu1 Sn1'
_cell_volume   149.06
_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  K1  1  0.76  0.34  0.43  1.0
  K  K2  1  0.71  0.0  0.19  1.0
  Cu  Cu0  1  0.24  0.0  0.89  1.0
  Sn  Sn3  1  0.23  0.34  0.93  1.0

data_K2CuSn
_symmetry_space_group_name_H-M   P1
_cell_length_a   4.69
_cell_length_b   5.05
_cell_length_c   6.76
_cell_angle_alpha   111.32
_cell_angle_beta   90.0
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   1
_chemical_formula_structural   K2CuSn
_chemical_formula_sum   'K2 Cu1 Sn1'
_cell_volume   149.06
_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  0.0  0.29  0.81  1.0
  K  K1  1  0.66  0.24  0.57  1.0
  Cu  Cu2  1  0.0  0.76  0.11  1.0
  Sn  Sn3  1  0.66  0.77  0.07  1.0

K K Cu Sn