data_NaCuSn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.18
_cell_length_b   5.18
_cell_length_c   5.18
_cell_angle_alpha   125.92
_cell_angle_beta   125.92
_cell_angle_gamma   80.03
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaCuSn2
_chemical_formula_sum   'Na1 Cu1 Sn2'
_cell_volume   88.1
_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
  Na  Na1  1  0.0  0.0  0.0  1.0
  Cu  Cu0  1  0.0  0.0  0.97  1.0
  Sn  Sn2  1  0.36  0.0  0.98  1.0
  Sn  Sn3  1  0.0  0.36  0.98  1.0

data_NaCuSn2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   6.66
_cell_length_b   6.66
_cell_length_c   5.18
_cell_angle_alpha   90.0
_cell_angle_beta   130.01
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NaCuSn2
_chemical_formula_sum   'Na2 Cu2 Sn4'
_cell_volume   176.2
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  'x, -y, z'
  3  'x+1/2, y+1/2, z'
  4  'x+1/2, -y+1/2, 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
  Na  Na0  2  0.0  0.0  0.0  1.0
  Cu  Cu1  2  0.0  0.0  0.97  1.0
  Sn  Sn2  4  0.32  0.32  0.63  1.0

Na Cu Sn Sn
Na Cu Sn Sn 0 1 o o - 0 2 o o - 0 3 o o - 1 2 o o o 1 3 o o o 