data_NaNbZn2
_symmetry_space_group_name_H-M   'P 1'
_cell_length_a   10.2
_cell_length_b   10.2
_cell_length_c   10.2
_cell_angle_alpha   16.31
_cell_angle_beta   16.31
_cell_angle_gamma   16.31
_symmetry_Int_Tables_number   1
_chemical_formula_structural   NaNbZn2
_chemical_formula_sum   'Na1 Nb1 Zn2'
_cell_volume   72.87
_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  Na0  1  0.0  0.0  0.0  1.0
  Nb  Nb1  1  0.0  0.0  0.09  1.0
  Zn  Zn2  1  0.0  0.0  0.79  1.0
  Zn  Zn3  1  0.0  0.0  0.38  1.0

data_NaNbZn2
_symmetry_space_group_name_H-M   Cm
_cell_length_a   5.01
_cell_length_b   2.89
_cell_length_c   10.2
_cell_angle_alpha   90.0
_cell_angle_beta   99.43
_cell_angle_gamma   90.0
_symmetry_Int_Tables_number   8
_chemical_formula_structural   NaNbZn2
_chemical_formula_sum   'Na2 Nb2 Zn4'
_cell_volume   145.73
_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
  Nb  Nb1  2  0.0  0.0  0.91  1.0
  Zn  Zn2  2  0.0  0.0  0.21  1.0
  Zn  Zn3  2  0.0  0.0  0.62  1.0

Na Nb Zn Zn