data_NaZn
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   5.97
_cell_length_b   5.97
_cell_length_c   5.51
_cell_angle_alpha   108.31
_cell_angle_beta   108.31
_cell_angle_gamma   29.62
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaZn
_chemical_formula_sum   'Na2 Zn2'
_cell_volume   91.72
_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
  Na  Na0  1  0.19  0.0  0.5  1.0
  Na  Na1  1  0.56  0.0  0.71  1.0
  Zn  Zn2  1  0.05  0.0  0.51  1.0
  Zn  Zn3  1  0.71  0.0  0.7  1.0

data_NaZn
_symmetry_space_group_name_H-M   P-1
_cell_length_a   3.05
_cell_length_b   5.51
_cell_length_c   5.97
_cell_angle_alpha   108.31
_cell_angle_beta   104.81
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   2
_chemical_formula_structural   NaZn
_chemical_formula_sum   'Na2 Zn2'
_cell_volume   91.72
_cell_formula_units_Z   2
loop_
 _symmetry_equiv_pos_site_id
 _symmetry_equiv_pos_as_xyz
  1  'x, y, z'
  2  '-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  Na0  2  0.0  0.4  0.82  1.0
  Zn  Zn1  2  0.0  0.4  0.67  1.0

Na Na Zn Zn